HPAVC/HPAVC CD-ROM.iso/INTER53A.ZIP/INTERRUP.C

Text File | 1997-01-12 | 325KB | 8,800 lines

Interrupt List, part 3 of 16
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997 Ralf Brown
--------T-1513-------------------------------
INT 15 - VMiX - "sys_wake" - WAKE SLEEPING PROCESS
    AH = 13h
    STACK:    WORD    process ID
Return: AX = status (SYS_OK or SYS_ERROR)
SeeAlso: AH=12h"VMiX"
--------T-1513-------------------------------
INT 15 - MultiDOS Plus - GET TASK CONTROL BLOCK
    AH = 13h
Return: BX:AX -> task control block (see #0360)
SeeAlso: AH=15h"MultiDOS"

Format of MultiDOS Plus v4.0 task control block:
Offset    Size    Description    (Table 0360)
 00h    DWORD    pointer to next TCB
 04h  8 BYTEs    ASCIZ task name
 0Ch  2 BYTEs    ???
 0Eh    WORD    task PSP segment
 10h    WORD    abort/suspend flags
 12h    WORD    current screen segment (see AH=0Bh,AH=0Ch)
 14h    WORD    priority level (0000h-FFFEh)
 16h    WORD    time slice counter
 18h  2 BYTEs    ???
 1Ah    WORD    suspend timer value
 1Ch    WORD    stack segment
 1Eh    WORD    stack pointer
 20h    WORD    display type
 22h    WORD    display memory
 24h  2 BYTEs    ???
 26h    WORD    termination count
 28h    WORD    equipment flag for BIO10 driver
 2Ah    BYTE    background CRT mode
 2Bh    WORD    screen width in columns
 2Dh    WORD    screen size in bytes
 2Fh    WORD    segment of physical screen memory
 31h 16 BYTEs    eight cursor positions
 41h    WORD    current cursor shape
 43h    BYTE    active display page
 44h    WORD    CRT controller I/O port base
 46h  2 BYTEs    ???
 48h    WORD    foreground task flag
 4Ah  6 BYTEs    ???
 50h    WORD    saved video segment (see AH=0Bh,AH=0Ch)
 52h    DWORD    old INT 22
 56h    DWORD    old INT 23
 5Ah    DWORD    old INT 24
 5Eh    WORD    top of memory for task
 60h  4 BYTEs    ???
 64h    WORD    DTA segment (see INT 21/AH=1Ah)
 66h    WORD    DTA offset
 68h  4 BYTEs    ???
 6Ch    BYTE    current ANSI.SYS attribute
 6Dh    BYTE    current ANSI.SYS column
 6Eh    BYTE    current ANSI.SYS row
 6Fh    BYTE    current ANSI.SYS display state
 70h    BYTE    maximum ANSI.SYS columns
 71h    BYTE    current ANSI.SYS page
 72h    WORD    saved ANSI.SYS cursor position
 74h    BYTE    ANSI.SYS parameter buffer index
 75h    BYTE    current ANSI.SYS screen mode
 76h    BYTE    ANSI.SYS wrap flag
 77h  6 BYTEs    ANSI.SYS parameter buffer
 7Dh    BYTE    ANSI.SYS keyboard DSR state
 7Eh  7 BYTEs    ANSI.SYS keyboard DSR buffer
 85h  3 BYTEs    ???
 88h 16 BYTEs    request header for DOS driver calls
 98h 14 BYTEs    ???
 A6h    WORD    segment of EMS map if EMS task
 A8h    WORD    flag: task makes EMS calls
 AAh    WORD    EMS handle for task
 ACh    WORD    keyboard shift state
 AEh 12 BYTEs    ???
 BAh    WORD    TCB of parent if child task
 BCh    WORD    termination code
 BEh    WORD    COM port number
 C0h  4 BYTEs    ???
 C4h    WORD    current IRQ number
 C6h  2 BYTEs    ???
 C8h    WORD    miscellaneous flag word
 CAh  2 BYTEs    ???
 CCh    DWORD    old INT 10
 D0h    WORD    EMS alternate map set number
 D2h 414 BYTEs    DOS current disk and directory context (optional)
--------T-1514-------------------------------
INT 15 - VMiX - "sys_clrwindow" - CLEAR WINDOW
    AH = 14h
    STACK:    WORD    top left corner of window (high byte = row, low = col)
        WORD    bottom right corner of window (high = row, low = col)
Return: AX = status (SYS_OK)
Note:    clears window to color set with "sys_setcolors" (AH=18h)
SeeAlso: AH=15h"VMiX",AH=16h"VMiX",AH=18h"VMiX",AH=1Fh"VMiX"
--------T-1514-------------------------------
INT 15 - MultiDOS Plus - CHECK IF MultiDOS FOREGROUND OR BACKGROUND
    AH = 14h
Return: AX = current state
        0000h MultiDOS Plus command prompt is background task
        0001h command prompt is foreground task
SeeAlso: AH=0Bh"MultiDOS"
--------T-1515-------------------------------
INT 15 - VMiX - "sys_setbwindow" - SET BANNER WINDOW MESSAGE
    AH = 15h
    STACK:    DWORD    pointer to ASCIZ banner message for top of screen
Return: AX = status (SYS_OK)
SeeAlso: AH=14h"VMiX",AH=16h"VMiX"
--------T-1515-------------------------------
INT 15 - MultiDOS Plus - GET SYSTEM BLOCK
    AH = 15h
Return: BX:AX -> system block (see #0361)
SeeAlso: AH=13h"MultiDOS"

Format of MultiDOS Plus 4.0 system block:
Offset    Size    Description    (Table 0361)
 00h    WORD    segment of system control block
 02h    WORD    redirection flag set by /NOREDIRECT
 04h    WORD    no-INT 10 flag set by /NO10
 06h    DWORD    old INT 10
 0Ah    DWORD    new INT 10
 0Eh    DWORD    pointer to WORD with current TCB offset (see #0360)
 12h    DWORD    pointer to WORD with idle task TCB offset
 16h    DWORD    pointer to WORD with foreground TCB offset (see #0360)
 1Ah    DWORD    pointer to WORD with MultiDOS TCB offset (see #0360)
 1Eh    WORD    Task Control Block size
 20h    WORD    number of TCBs
 22h    WORD    flag: EMS present
 24h    WORD    EMS page frame base segment
 26h    WORD    16K pages in EMS page frame
 28h    WORD    base segment for conventional memory tasks
 2Ah    WORD    conventional memory size in paragraphs
 2Ch    DWORD    pointer to list of queue pointers
--------T-1516-------------------------------
INT 15 - VMiX - "sys_setwindow" - SET ROOT WINDOW SIZE AND HOME CURSOR
    AH = 16h
    STACK:    DWORD    pointer to I/O Request Packet
        WORD    top left corner of window (high byte = row, low = col)
        WORD    bottom right corner of window (high = row, low = col)
Return: AX = status (SYS_OK or SYS_ERROR)
SeeAlso: AH=14h"VMiX",AH=17h"VMiX"
--------T-1516-------------------------------
INT 15 - MultiDOS Plus - INITIALIZATION
    AH = 16h
Note:    used internally during initialization; any other calls will cause
      unpredictable results
--------T-1517-------------------------------
INT 15 - VMiX - "sys_getcolors" - GET CONSOLE WINDOW COLORS
    AH = 17h
Return: AH = foreground color
    AL = background color
SeeAlso: AH=16h"VMiX",AH=18h"VMiX"
--------T-1517-------------------------------
INT 15 - MultiDOS Plus - MAP IRQ
    AH = 17h
    AL = IRQ to map (01h-0Fh)
    BX = offset of task control block (see #0360) to associate with IRQ
Return: AX = status
        0000h successful
        other invalid IRQ
Note:    the EMS map of the specified TCB is associated with the given interrupt
SeeAlso: AH=18h"MultiDOS",AH=19h"MultiDOS"
--------T-1518-------------------------------
INT 15 - VMiX - "sys_setcolors" - SET CONSOLE COLORS
    AH = 18h
    STACK:    WORD    new background/foreground colors
            bits 3-0: foreground
            bits 7-4: background
            bits 15-8: unused
Return: AX = color
SeeAlso: AH=14h"VMiX",AH=17h"VMiX",AH=19h"VMiX"
--------T-1518-------------------------------
INT 15 - MultiDOS Plus - UNMAP IRQ
    AH = 18h
    AL = IRQ to unmap (01h-0Fh)
Return: AX = status
        0000h successful
        0001h invalid IRQ
Note:    results are unpredictable if the IRQ has not been mapped
SeeAlso: AH=17h"MultiDOS",AH=19h"MultiDOS"
--------T-1519-------------------------------
INT 15 - VMiX v2+ - "sys_setconwn" - SET WINDOW COLORS
    AH = 19h
    STACK:    WORD    new background/foreground colors
            bits 3-0: foreground
            bits 7-4: background
            bits 15-8: unused
Return: AX = color
SeeAlso: AH=18h"VMiX"
--------T-1519-------------------------------
INT 15 - MultiDOS Plus - UNMAP ALL IRQs
    AH = 19h
Return: AX destroyed
Note:    for MultiDOS internal use only
SeeAlso: AH=17h"MultiDOS",AH=18h"MultiDOS"
--------T-151A-------------------------------
INT 15 - VMiX v2+ - "sys_sint" - INVOKE SOFTWARE INTERRUPT
    AH = 1Ah
    STACK:    WORD    interrupt number
        DWORD    pointer to register structure
Return: AX = returned flags
--------T-151A-------------------------------
INT 15 - MultiDOS Plus - MAP SEMAPHORE NAME TO NUMBER
    AH = 1Ah
    DS:SI -> 8-byte name
Return: AL = status
        00h successful
        AH = semaphore number (20h-3Fh)
        04h out of string space
Notes:    all eight bytes of the name are significant
    if the name does not already exist, it is added to the name table and
      associated with a free semaphore number
    names cannot be destroyed
SeeAlso: AH=1Bh"MultiDOS",AH=1Ch"MultiDOS",AH=1Dh"MultiDOS"
--------T-151B-------------------------------
INT 15 - VMiX v2+ - "sys_blkmov" - MOVE MEMORY BLOCK
    AH = 1Bh
    STACK:    DWORD    source address
        DWORD    destination address
        WORD    number of words to move
Return: nothing
--------T-151B-------------------------------
INT 15 - MultiDOS Plus - REQUEST RESOURCE SEMAPHORE BY NAME
    AH = 1Bh
    DS:SI -> 8-byte name
Return: AH = status
        00h successful
        02h invalid semaphore number
        03h caller already owns semaphore
        04h out of string space
Notes:    (see AH=01h"MultiDOS")
    equivalent to AH=1Ah followed by AH=01h
SeeAlso: AH=01h"MultiDOS",AH=1Ah"MultiDOS",AH=1Ch"MultiDOS",AH=1Dh"MultiDOS"
--------T-151C-------------------------------
INT 15 - VMiX v2+ - "sys_bitblt" - PUT GRAPHICAL OBJECT AT CURSOR POSITION
    AH = 1Ch
    STACK:    WORD    AND/OR pixel with background (00h = OR, 01h = AND)
        DWORD    pointer to object bitmap
        WORD    object width in pixels
        WORD    object height in pixels
Return: nothing
SeeAlso: AH=1Dh"VMiX"
--------T-151C-------------------------------
INT 15 - MultiDOS Plus - RELEASE RESOURCE SEMAPHORE BY NAME
    AH = 1Ch
    DS:SI -> 8-byte name
Return: AH = status
        00h successful
        01h not semaphore owner
        02h invalid semaphore number
        04h out of string space
Notes:    (see AH=02h"MultiDOS")
    equivalent to AH=1Ah followed by AH=02h
SeeAlso: AH=02h"MultiDOS",AH=1Ah"MultiDOS",AH=1Bh"MultiDOS",AH=1Dh"MultiDOS"
--------T-151D-------------------------------
INT 15 - VMiX v2+ - "sys_getfont" - GET CURRENT CONSOLE GRAPHICS FONT
    AH = 1Dh
Return: AX = current font number (00h-03h)
SeeAlso: AH=1Ch"VMiX",AH=1Eh"VMiX"
--------T-151D-------------------------------
INT 15 - MultiDOS Plus - TEST RESOURCE SEMAPHORE BY NAME
    AH = 1Dh
    DS:SI -> 8-byte name
Return: AH = status
        00h semaphore not in use
        01h semaphore owned by another task
        02h invalid semaphore number
        03h caller owns semaphore
        04h out of string space
Notes:    (see AH=10h"MultiDOS")
    equivalent to AH=1Ah followed by AH=10h
SeeAlso: AH=10h"MultiDOS",AH=1Ah"MultiDOS",AH=1Bh"MultiDOS",AH=1Ch"MultiDOS"
--------T-151E-------------------------------
INT 15 - VMiX v2+ - "sys_setfont" - SET CONSOLE GRAPHICS FONT
    AH = 1Eh
    STACK: WORD new font number (00h-03h)
Return: AX = current font number (00h-03h)
SeeAlso: AH=1Dh"VMiX"
--------T-151E00-----------------------------
INT 15 - MultiDOS Plus - CLEAR EVENT COUNTER
    AX = 1E00h
    DX = event/trigger number (00h-3Fh)
Return: AH = status
        00h successful
SeeAlso: AX=1E01h,AX=1E02h
--------T-151E01-----------------------------
INT 15 - MultiDOS Plus - TRIGGER EVENT
    AX = 1E01h
    DX = event/trigger number (00h-3Fh)
Return: AH = status
        00h successful
        01h invalid event/trigger number
Notes:    schedules any task waiting for event; if no task is waiting, the event
      counter is incremented (and will roll over if it was 65535)
    may be invoked by interrupt handler
SeeAlso: AX=1E00h,AX=1E02h
--------T-151E02-----------------------------
INT 15 - MultiDOS Plus - WAIT FOR EVENT
    AX = 1E02h
    DX = event/trigger number (00h-3Fh)
Return: AH = status
        00h successful
        01h invalid event/trigger number
Note:    if the event counter is zero, the task is suspended until the event is
      triggered with AX=1E01h; else, the counter is decremented and the
      call returns immediately
SeeAlso: AX=1E00h,AX=1E01h
--------T-151E08-----------------------------
INT 15 - MultiDOS Plus 4.01 - SET CONTEXT-SWITCH FUNCTIONS
    AX = 1E08h
    DX:BX -> context save handler (see #0362)
    DX:CX -> context restore handler (see #0362)
Return: nothing
Note:    handlers may be removed by setting addresses to 0000h:0000h

(Table 0362)
Values MultiDOS Plus context-switch handlers are called with:
    ES:BX -> task's TCB
Return: all registers preserved
--------T-151F-------------------------------
INT 15 - VMiX v2.???+ - "sys_scrollwin" - SCROLL WINDOW
    AH = 1Fh
    STACK:    WORD    top left corner of window (high byte = row, low = col)
        WORD    bottom right corner of window
Return: AX = status (SYS_OK)
SeeAlso: AH=14h"VMiX",AH=18h"VMiX"
--------T-151F-------------------------------
INT 15 - MultiDOS Plus v4.01 - GET MEMORY PARAMETERS
    AH = 1Fh
Return: BX = first segment of conventional memory
    DX = first segment of EMS swap frame into which MultiDOS will load
        programs
--------T-1520-------------------------------
INT 15 - MultiDOS Plus v4.01 - CHECK IF MULTITASKING ENABLED
    AH = 20h
Return: AX = current state
        0000h multitasking enabled
        other TCB of task that disabled multitasking
SeeAlso: AH=0Dh"MultiDOS",AH=13h"MultiDOS"
--------c-152000-----------------------------
INT 15 U - DOS 3.0+ PRINT.COM - DISABLE CRITICAL REGION FLAG
    AX = 2000h
Return: nothing
Desc:    stop setting user flag on entry to PRINT critical region
Note:    also supported by PC Network v1.00 RECEIVER.COM
SeeAlso: AX=2001h
--------c-152001-----------------------------
INT 15 U - DOS 3.0+ PRINT.COM - SET CRITICAL REGION FLAG
    AX = 2001h
    ES:BX -> byte which is to be incremented while in a DOS call
Return: nothing
Desc:    specify a user flag which PRINT should set to let an interested
      application know it is in a critical region
Note:    also supported by PC Network v1.00 RECEIVER.COM
SeeAlso: AX=2000h
--------O-152010-----------------------------
INT 15 - OS HOOK - SETUP SYSREQ ROUTINE (AT,XT286,PS50+)
    AX = 2010h
    ???
Return: ???
SeeAlso: AX=2011h
--------O-152011-----------------------------
INT 15 - OS HOOK - COMPLETION OF SYSREQ FUNCTION (AT,XT286,PS50+)
    AX = 2011h
    ???
Return: ???
SeeAlso: AX=2010h
--------B-1521-------------------------------
INT 15 - SYSTEM - POWER-ON SELF-TEST ERROR LOG (PS50+)
    AH = 21h
    AL = subfunction
        00h read POST log
        01h write POST log
        BH = device ID
        BL = error code
Return: CF set on error
    AH = status (00h OK, 01h list full, 80h invalid cmd, 86h unsupported)
    if function 00h:
       BX = number of error codes stored
       ES:DI -> error log
Notes:    the log is a series of words, the first byte of which identifies the
      error code and the second the device.
    supported by AMI PCI BIOS
--------B-1522-------------------------------
INT 15 - SYSTEM - later PS/2s - LOCATE ROM BASIC
    AH = 22h
Return: CF set on error
        AH = status (86h if function not supported)
    CF clear on success
        AH = 00h
        ES:BX -> ROM BASIC
Note:    if this function is not supported, ROM BASIC is at F600h:0000h
SeeAlso: INT 86"BASIC",INT F0"BASIC"
--------B-152300-----------------------------
INT 15 U - SYSTEM - PS/1s - GET ??? CMOS DATA
    AX = 2300h
Return: CF clear if successful
        CL = value of CMOS location 2Dh
        CH = value of CMOS location 2Eh
    CF set on error
        AH = error code (80h,86h)
SeeAlso: AX=2301h,AX=2304h,AX=2305h
--------B-152301-----------------------------
INT 15 U - SYSTEM - PS/1s - SET ??? CMOS DATA
    AX = 2301h
    CL = new value for CMOS location 2Dh
    CH = new value for CMOS location 2Eh
Return: CF clear if successful
    CF set on error
        AH = error code (80h,86h)
Note:    sets the contents of CMOS locations 2Dh and 2Eh
SeeAlso: AX=2300h,AX=2304h,AX=2305h
--------B-152302-----------------------------
INT 15 U - SYSTEM - PS/1s - GET ROM STARTUP VIDEO REGISTER TABLES
    AX = 2302h
    BL = data index (00h-0Dh) (see #0363)
Return: ES:BX -> table for register (see #0364,#0365)
    CX = size of table in bytes (may be 0000h)

(Table 0363)
Values for PS/1 ROM startup video register tables:
 00h    DAC registers
 01h    ???
 02h    Palette registers
 03h-0Dh ???

Format of PS/1 ROM startup DAC register table:
Offset    Size    Description    (Table 0364)
 00h    WORD    number of DAC registers in table
 02h    var    array of 3-byte DAC register values, starting at register 00h
SeeAlso: #0363

Format of PS/1 ROM startup Palette register table:
Offset    Size    Description    (Table 0365)
 00h 16 BYTEs    colors for palette registers 00h through 0Fh
 10h    BYTE    border color
SeeAlso: #0363,#0017
--------B-152303-----------------------------
INT 15 U - SYSTEM - PS/1s - ???
    AX = 2303h
    BX = ??? ('x')
    DX = 'y' and 'z'
        bits 15-7 = 'y'
        bits 6-3 unused
        bits 2-0 = 'z'
    DI = ??? (0352h)
Return: ???
Note:    performs graphics functions, writes to segment A000h and VGA I/O ports
--------B-152304-----------------------------
INT 15 U - SYSTEM - PS/1s - SYSTEM SETUP
    AX = 2304h
    DX = segment of 32K buffer
Return: CF clear if successful
        AX = 0003h (left over from setting video mode 3)
        BX,CX,DX,BP,DS,ES destroyed
    CF set on error
        AH = error code (80h,86h)
Desc:    run system setup utility, and optionally save any changed settings to
      CMOS RAM
SeeAlso: AX=2301h,AX=2305h
--------B-152305-----------------------------
INT 15 U - SYSTEM - PS/1s - GET PROCESSOR SPEED
    AX = 2305h
Return: CF clear if successful
        AL = processor speed in MHz
    CF set on error
        AL = FFh (speed unknown or >80 MHz)
        AL = error code (80h,86h = unsupported function)
SeeAlso: AX=2301h,AX=2304h,AH=BCh
--------b-152400-----------------------------
INT 15 - SYSTEM - later PS/2s - DISABLE A20 GATE
    AX = 2400h
Return: CF clear if successful
        AH = 00h
    CF set on error
        AH = status
        01h keyboard controller is in secure mode
        86h function not supported
Note:    also supported by AMI PCI BIOS and Qualitas 386MAX v6.01+
BUG:    AMI BIOS v1.00.03.AV0M never reports an error on failure to disable
      the A20 gate; it simply writes 0 to PORT 0092h
SeeAlso: AX=2401h,AX=2402h,AX=2403h,PORT 0092h
--------b-152401-----------------------------
INT 15 - SYSTEM - later PS/2s - ENABLE A20 GATE
    AX = 2401h
Return: CF clear if successful
        AH = 00h
    CF set on error
        AH = status
        01h keyboard controller is in secure mode
        86h function not supported
Note:    also supported by AMI PCI BIOS and Qualitas 386MAX v6.01+
SeeAlso: AX=2400h,AX=2402h,PORT 0092h
--------b-152402-----------------------------
INT 15 - SYSTEM - later PS/2s - GET A20 GATE STATUS
    AX = 2402h
Return: CF clear if successful
        AH = 00h
        AL = current state (00h disabled, 01h enabled)
        CX = ??? (set to 0000h-000Bh or FFFFh by AMI BIOS v1.00.03.AV0M)
        FFFFh if keyboard controller does not become ready within C000h
             read attempts
    CF set on error
        AH = status
        01h keyboard controller is in secure mode
        86h function not supported
Note:    also supported by AMI PCI BIOS and Qualitas 386MAX v6.01+
SeeAlso: AX=2400h,AX=2401h
--------b-152403-----------------------------
INT 15 - SYSTEM - later PS/2s - QUERY A20 GATE SUPPORT
    AX = 2403h
Return: CF clear if successful
        AH = 00h
        BX = status of A20 gate support (see #0366)
    CF set on error
        AH = status
        01h keyboard controller is in secure mode
        86h function not supported
Note:    also supported by AMI PCI BIOS and Qualitas 386MAX v6.01+
BUG:    at one point early in processing INT 15/AH=24h, the AMI PCI BIOS
      version 1.00.05.AX1 compares whether AL==03h instead of AL>=03h,
      thus causing a random branch on any value of AL greater than 3.
SeeAlso: AX=2402h

Bitfields for A20 gate support status:
Bit(s)    Description    (Table 0366)
 0    supported on keyboard controller
 1    supported with bit 1 of I/O port 92h
 15    additional data is available (location not yet defined)
--------T-153000-----------------------------
INT 15 - Object Kernel for DOS - INSTALLATION CHECK
    AX = 3000h
Return: AX:BX = 4F42h:4A21h ('OBJ!') if installed
        CX = resident segment
Program: the Object Kernel is a program by M.W. Pieters which is currently
      under development
Note:    Central Point's CPBACKUP v9 calls INT 15/AX=3000h at startup, but it
      may be checking for a different program's presence
SeeAlso: AX=3001h,AX=3008h
--------T-153001-----------------------------
INT 15 - Object Kernel for DOS - GET STATUS BLOCK
    AX = 3001h
Return: AX = FFFFh
    ES:DI -> status block
SeeAlso: AX=3000h,AX=3008h
--------T-153002-----------------------------
INT 15 - Object Kernel for DOS - KILL PROCESS
    AX = 3002h
    (not yet implemented)
SeeAlso: AX=3000h
--------T-153003-----------------------------
INT 15 - Object Kernel for DOS - STOP PROCESS
    AX = 3003h
    (not yet implemented)
SeeAlso: AX=3000h
--------T-153004-----------------------------
INT 15 - Object Kernel for DOS - START PROCESS
    AX = 3004h
    (not yet implemented)
SeeAlso: AX=3000h
--------T-153005-----------------------------
INT 15 - Object Kernel for DOS - RESTART PROCESS
    AX = 3005h
    (not yet implemented)
SeeAlso: AX=3000h
--------T-153006-----------------------------
INT 15 - Object Kernel for DOS - EXECUTE PROCESS
    AX = 3006h
    (not yet implemented)
SeeAlso: AX=3000h
--------T-153007-----------------------------
INT 15 - Object Kernel for DOS - LIST PROCESSES
    AX = 3007h
    (not yet implemented)
SeeAlso: AX=3000h
--------T-153008-----------------------------
INT 15 - Object Kernel for DOS - SWITCH ObjectKernel ON/OFF
    AX = 3008h
    BH = new state (00h disabled, 01h enabled)
Return: AX = FFFFh
SeeAlso: AX=3000h,AX=3009h
--------T-153009-----------------------------
INT 15 - Object Kernel for DOS - RESERVED FOR FUTURE USE
    AX = 3009h to 30FFh
SeeAlso: AX=3000h
Program: the Object Kernel is a program by M.W. Pieters which is currently
      under development
--------B-1540-------------------------------
INT 15 - SYSTEM - READ/MODIFY PROFILES (CONVERTIBLE)
    AH = 40h
    AL = subfunction
        00h get system profile in CX and BX
        01h set system profile from CX and BX
        02h get internal modem profile in BX
        03h set internal modem profile from BX
Return: CF clear if successful
        AH = 00h
    CF set on error
        AH = status (80h = profile execution failed)
--------V-154000-----------------------------
INT 15 - Compaq SLT/286 or Portable 386 - READ LCD/PLASMA TIMEOUT
    AX = 4000h
Return: AX = 4000h
    CL = timeout in minutes, 00h if disabled
SeeAlso: AX=4001h,AX=4600h
--------V-154001-----------------------------
INT 15 - Compaq SLT/286 or Portable 386 - SET LCD/PLASMA TIMEOUT
    AX = 4001h
    CL = timeout in minutes, 00h to disable
Return: AL = status
        00h timeout modified
        01h timeout cannot be modified
        40h timeout cannot be modified
    CL = timeout in minutes, 00h if disabled
SeeAlso: AX=4000h,AX=4601h
--------B-1541-------------------------------
INT 15 - SYSTEM - WAIT ON EXTERNAL EVENT (CONVERTIBLE and some others)
    AH = 41h
    AL = condition type (see #0367)
    BH = condition compare or mask value
    BL = timeout value times 55 milliseconds
        00h means no timeout
    DX = I/O port address if AL bit 4 set
    ES:DI -> user byte if AL bit 4 clear
Return: after event or timeout occurs
Note:    call AH=C0h and examine bit 3 of feature byte 1 to determine whether
      this function is supported
SeeAlso: AH=83h,AH=86h,AH=C0h

Bitfields for external event wait condition type:
Bit(s)    Description    (Table 0367)
 0-2    condition to wait for
    0 any external event
    1 compare and return if equal
    2 compare and return if not equal
    3 test and return if not zero
    4 test and return if zero
 3    reserved
 4    1=port address, 0=user byte
 5-7    reserved
--------B-1542-------------------------------
INT 15 - SYSTEM - REQUEST POWER OFF (CONVERTIBLE,HP 95LX)
    AH = 42h
    AL = suspend type
        00h to use system profile
        01h to force suspend regardless of system profile
Return: nothing
Note:    the HP 95LX apparently suspends regardless of the value in AL; on
      power-up, execution will resume following the instruction calling
      this function
SeeAlso: AH=44h
--------b-154280-----------------------------
INT 15 - Compaq SLT/286 - ENTER STANDBY
    AX = 4280h
Return: AH = 42h
    CF clear if successful
    CF set if unable to enter standby
SeeAlso: AX=4600h,AX=5307h/CX=0001h"STAND-BY"
--------B-1543-------------------------------
INT 15 - SYSTEM - READ SYSTEM STATUS (CONVERTIBLE)
    AH = 43h
Return: AL = status bits (see #0368)

Bitfields for Convertible system status:
Bit(s)    Description    (Table 0368)
 7    power low
 6    external power in use
 5    standby power lost
 4    power activated by alarm
 3    internal modem powered on
 2    RS232/parallel adapter powered on
 1    reserved
 0    LCD detached
--------B-1544-------------------------------
INT 15 - SYSTEM - (DE)ACTIVATE INTERNAL MODEM POWER (CONVERTIBLE)
    AH = 44h
    AL = new modem power state (00h power off, 01h power on)
Return: nothing
SeeAlso: AH=42h
--------b-1544C0-----------------------------
INT 15 - Olivetti Quaderno - INITIALIZE DIGITAL SIGNAL PROCESSING???
    AX = 44C0h
    ES:DI -> new DSP procedure (exchanged with CMOS[28h])
    ES:SI -> ??? buffer
Return: ES:DI -> old DSP procedure
    ES:SI buffer filled with ten bytes from CMOS (addresses 14h-1Ch)
      followed by 00h (addresses 15h-1Ch copied only if less than 21h)
Note:    this function is also supported by XBIOS.COM
SeeAlso: AX=44C9h
--------b-1544C1-----------------------------
INT 15 - Olivetti Quaderno - ???
    AX = 44C1h
    ???
Return: ???
Note:    this function is also supported by XBIOS.COM
SeeAlso: AX=44C9h
--------b-1544C2-----------------------------
INT 15 - Olivetti Quaderno - ???
    AX = 44C2h
    DL = byte to be written to I/O port 350h
Note:    this function is also supported by XBIOS.COM
SeeAlso: AX=44C3h,AX=44C9h
--------b-1544C3-----------------------------
INT 15 - Olivetti Quaderno - GET ???
    AX = 44C3h
Return: DH = bitfields (see #0369)
    DL = value read from I/O port 350h
Note:    this function is also supported by XBIOS.COM
SeeAlso: AX=44C2h,AX=44C9h

Bitfields for Olivetti Quaderno ???:
Bit(s)    Description    (Table 0369)
 5-7    5-7 read from I/O port 351h
 2-4    zero
 1-0    "tres complique"
--------b-1544C4-----------------------------
INT 15 - Olivetti Quaderno - ???
    AX = 44C4h and 44C5h
    ???
Return: ???
Note:    this function is also supported by XBIOS.COM
SeeAlso: AX=44C9h
--------b-1544C6-----------------------------
INT 15 - Olivetti Quaderno - READ LCD
    AX = 44C6h
Return: DX = FFFFh clock is displayed on LCD display
    DX = other: hex number displayed in first four positions of display
    BH = left alphanumeric character on display (see #0370)
    BL = right alphanumeric character on display (see #0370)
    CL = colon flags (see #0371)
Notes:    the LCD display has the format HH:HH:AA, where H is a hex digit and A
      is an alphanumeric character
    this function is also supported by XBIOS.COM
SeeAlso: AX=44C7h,AX=44C9h

(Table 0370)
Values for Olivetti Quaderno LCD alphanumeric characters:
 00h-0Fh hex digit
 2Bh    "+"
 2Dh    "-"
 30h-39h "0" to "9"
 41h-5Ah "A" to "Z"
 61h-6Ah "a" to "z"
 else    blank

Bitfields for Olivetti Quaderno LCD colon flags:
Bit(s)    Description    (Table 0371)
 0    left colon on
 1    right colon on
 2-7    unused
--------b-1544C7-----------------------------
INT 15 - Olivetti Quaderno - WRITE LCD
    AX = 44C7h
    DX = hex display
        FFFFh display clock and "HI", "Md", or "Lo"
        BH,BL,CL unused
        other: display specified hex number in first four positions
        BH = left alphanumeric character on display (see #0370)
        BL = right alphanumeric character on display (see #0370)
        CL = colon flags (see #0371)
Return: nothing
Note:    this function is also supported by XBIOS.COM
SeeAlso: AX=44C6h
--------b-1544C8-----------------------------
INT 15 - Olivetti Quaderno - ???
    AX = 44C8h
    CL = ??? (00h,02h,21h)
    CH = ???
    ???
Return: ???
Note:    this function is also supported by XBIOS.COM
SeeAlso: AX=44C9h
--------b-1544C9-----------------------------
INT 15 - Olivetti Quaderno - GET XBIOS VERSION
    AX = 44C9h
Return: AL = major version
    AH = minor version
Note:    this function is also supported by XBIOS.COM
--------B-1544F1-----------------------------
INT 15 U - Toshiba laptops - SECURITY LEVEL CHECK
    AX = 44F1h
    DS:DX -> byte with 00h ???
Return: ???
Note:    used by Toshiba BIOS setup utility TSETUP.EXE to distinguish
      between USER and SUPERVISOR security level
SeeAlso: AX=44F2h,AX=44F3h
--------B-1544F2BX0604-----------------------
INT 15 U - Toshiba laptops - SECURITY LEVEL CHECK
    AX = 44F2h
    BX = 0604h ???
Return: CF = ???
    AH = ???
    DX = ???
Note:    used by Toshiba BIOS setup utility TSETUP.EXE to distinguish
      between USER and SUPERVISOR security level
SeeAlso: AX=44F1h,AX=44F3h
--------B-1544F3-----------------------------
INT 15 U - Toshiba laptops - SECURITY LEVEL CHECK
    AX = 44F3h
    DS:DX -> byte with 00h or 01h ???
Return: DS:DX -> changed ???
Note:    used by Toshiba BIOS setup utility TSETUP.EXE to distinguish
      between USER and SUPERVISOR security level
SeeAlso: AX=44F1h,AX=44F2h
--------b-1545-------------------------------
INT 15 U - HP 100LX/200LX - SET DISPLAY CONTROL STATUS
    AH = 45h
    AL = new display control status
        bit 0: DISPCTL flag +C instead of -C
        bit 1: DISPCTL flag +K instead of -K
SeeAlso: AH=46h"HP",AH=47h"HP"
--------b-1546-------------------------------
INT 15 U - HP 100LX/200LX - SET POWER OFF TIMEOUT
    AH = 46h
    BX = timeout value in ticks
        0000h inhibit auto power off
Note:    the 200LX default timeout is 0CCDh = 3277 ticks = approx. 3 min.
SeeAlso: AH=45h"HP",AH=47h"HP"
--------b-154600-----------------------------
INT 15 - Compaq SLT/286 - READ POWER CONSERVATION/MODEM CONFIGURATION
    AX = 4600h
Return: AH = modem configuration information (see #0372)
    AL = power conservation status information (see #0373)
    BH = default system inactivity timeout (1-21 minutes)
    BL = current system inactivity timeout (1-21 minutes)
    CH = default video display inactivity timeout (1-63 minutes)
    CL = current video display inactivity timeout (1-63 minutes)
    DH = default fixed disk drive inactivity timeout (1-21 minutes)
    DL = current fixed disk drive inactivity timeout (1-21 minutes)
SeeAlso: AX=4280h,AX=4601h,INT 77

Bitfields for Compaq SLT/286 modem configuration information:
Bit(s)    Description    (Table 0372)
 0    powerup state (0 off, 1 on)
 1    modem installed
 2    IRQ line assignment (0 IRQ 4, 1 IRQ 3)
 3    COM port assignment (0 = COM 2, 1 = COM 1)
 4    modem state (0 not assigned, 1 assigned)
 5    modem is on

Bitfields for Compaq SLT/286 power conservation status:
Bit(s)    Description    (Table 0373)
 0    power source (0 internal, 1 external)
 1-2    low battery state
    00 no low battery condition
    01 low battery 1
    10 reserved
    11 low battery 2
 3-4    power conservation mode
    00 automatic, 01 on, 10 off, 11 reserved
--------b-154601-----------------------------
INT 15 - Compaq SLT/286 - MODIFY POWER CONSERVATION/MODEM CONFIGURATION
    AX = 4601h
    BL = system inactivity timeout (1-21 minutes)
        FFh do not change
    CL = video display inactivity timeout (1-63 minutes)
        FFh do not change
    DL = current fixed disk drive inactivity timeout (1-21 minutes)
        FFh do not change
    DH = new modem state (00h turn off, 01h turn on, FFh don't change)
Return: CF clear if successful
        AH = 00h
        BL = current system inactivity timeout (1-21 minutes)
        CL = current video display inactivity timeout (1-63 minutes)
        DL = current fixed disk drive inactivity timeout (1-21 minutes)
        DH = modem state (FFh unchanged, 00h turned off, 01h turned on)
    CF set on error
        AH = error code
        01h input is out of range
        02h no modem present
SeeAlso: AX=4600h,INT 77
--------b-154604-----------------------------
INT 15 - Compaq Contura 486 and "Alladin" 08/05/93 ROMs - GET ???
    AX = 4604h
Return: CF clear if successful
        AL = byte read from I/O port 03F8h
    CF set on error (not supported)
        AH = 86h (unsupported function)
Note:    also supported by 7/26/93 LTE Lite 386 ROM
--------b-154605-----------------------------
INT 15 - Compaq Contura 486 and "Alladin" 08/05/93 ROMs - ???
    AX = 4605h
Return: CF clear if successful
    CF set on error (not supported)
        AH = 86h (unsupported function)
Note:    this function is a NOP (other than clearing CF) in the 08/05/93 version
      of the Contura 486/486c/486cx and "Aladdin" ROM, and the 7/26/93
      LTE Lite 386 ROM
--------b-1547-------------------------------
INT 15 U - HP 100LX/200LX - GET/SET DISPLAY CONTRAST
    AH = 47h
    AL = subfunction
       00h set contrast
        BL = new contrast
            (00h-0Fh, 0Fh is darkest, 10h-FFh are same as 0Fh)
       other get current contrast
Return: AL = contrast (00h-0Fh, 0Fh is darkest)
Note:    may be for backward compatibility with HP95LX, as INT 15/AH=62h does
      substantially the same thing as this function
SeeAlso: AH=45h"HP",AH=48h"HP",AH=62h"HP"
--------b-1548-------------------------------
INT 15 U - HP 100LX/200LX - SET BUZZER VOLUME
    AH = 48h
    AL = volume (00h-03h; 03h is loudest, 04h-FFh are same as 03h)
SeeAlso: AH=47h"HP"
--------S-1549-------------------------------
INT 15 U - HP 100LX/200LX - SERIAL INTERFACE SELECT
    AH = 49h
    AL = serial interface
        00h wired (COM1)
        01h infrared
Note:    interface should only be changed in deactivated state (see AH=4Ah)
SeeAlso: AH=4Ah"HP"
--------J-154900-----------------------------
INT 15 - Far East MS-DOS - GET BIOS TYPE
    AX = 4900h
Return: CF clear if successful
        AH = 00h
        BL = BIOS mode
        00h DOS/V
        01h standard DBCS DOS (hardware DBCS support)
    CF set on error
        AH = 86h (function not supported)
Note:    in practice, DOS/J returns AH=86h; AX DOS does not support this call
SeeAlso: AH=50h,INT 21/AH=30h
--------S-154A-------------------------------
INT 15 U - HP 100LX/200LX - SERIAL INTERFACE CONTROL
    AH = 4Ah
    AL = control
        00h deactivate
        01h activate
Note:    interface selected with AH=49h will be (de)activated
SeeAlso: AH=49h"HP",AH=4Bh"HP"
--------b-154B-------------------------------
INT 15 U - HP 100LX/200LX - ADJUST SYSTEM TIME
    AH = 4Bh
Desc:    adjust system time based on real-time clock
SeeAlso: AH=4Ah"HP",INT 1A/AH=02h,INT 21/AH=2Ch
--------b-154DD4-----------------------------
INT 15 - HP 95LX/100LX/200LX - INSTALLATION CHECK
    AX = 4DD4h
Return: BX = 4850h ("HP") if HP 95LX/100LX/200LX
        CX = model
        0101h HP 95LX
        0102h HP 100LX/200LX
        DH = ???
        02h HP 200LX 2MB BIOS 1.01 A D german
        DL = ???
        00h HP 95LX
        01h HP 200LX 2MB BIOS 1.01 A D german
SeeAlso: INT 0B"HP 95LX",INT 0F"HP 95LX",INT 5F/AH=00h,INT 60/DI=0100h
SeeAlso: INT 61"HP 95LX"
--------b-154E-------------------------------
INT 15 - HP 95LX - ENABLE/DISABLE LIGHT SLEEP
    AH = 4Eh
    AL = light sleep
        00h disabled
        01h enabled
Note:    when light sleep is disabled, the system will continue running at full
      speed; when enabled, it may automatically slow to conserve batteries
SeeAlso: INT 06"HP 95LX",INT 60/DI=0100h
--------B-154F-------------------------------
INT 15 C - KEYBOARD - KEYBOARD INTERCEPT (AT model 3x9,XT2,XT286,CONV,PS)
    AH = 4Fh
    AL = hardware scan code (see #0005)
    CF set
Return: CF set to continue processing scan code
       AL = possibly-altered hardware scan code (see #0005)
    CF clear
       scan code should be ignored
Notes:    called by INT 09 handler to translate scan codes; the INT 09 code does
      not examine the scan code it reads from the keyboard until after
      this function returns.  This permits software to rearrange the
      keyboard; for example, swapping the CapsLock and Control keys, or
      turning the right Shift key into Enter.
    DOS 6 KEYB.COM will not pass through this function if Ctrl-Alt-Del is
      pressed and a SmartDrive v4-compatible cache is installed which has
      dirty cache buffers; some other disk caches such as HyperDisk
      operate similarly in order to prevent loss of cached data which has
      not yet been written to disk
SeeAlso: INT 09,INT 15/AH=C0h
--------J-1550-------------------------------
INT 15 - DOS/V - FONT SUBSYSTEM ACCESS
    AH = 50h
    AL = which function address to retrieve
        00h "read font" function
        01h "write font" function
    BL = 00h
    BH = character size (00h single-byte, 01h double-byte)
    DH = width of character cell
    DL = height of character cell
    BP = code page (see #0374)
Return: CF clear if successful
        AH = 00h
        ES:BX -> requested function's address
    CF set on error
        AH = error code (see #0375)
SeeAlso: AH=49h

(Table 0374)
Values for DOS/V code page:
 0    default
 437    US English
 932    Japanese
 934    Korea
 936    China
 938    Taiwan
SeeAlso: #1099

(Table 0375)
Values for DOS/V error code:
 01h    invalid font type in BH
 02h    BL not zero
 03h    invalid font size
 04h    invalid code page
 80h    unsupported function (PC)
 86h    unsupported function (XT)
SeeAlso: #1020
--------T-1550-------------------------------
INT 15 - VMIX v2.???+ - "sys_vm_page" - SET NEW VIRTUAL PAGE TABLE
    AH = 50h
    BX = segment of page directory table
    CX = page number of page table
SeeAlso: AH=10h"VMiX",AH=51h"VMiX",AH=52h"VMiX"
--------T-1551-------------------------------
INT 15 - VMiX v2.???+ - "sys_vm_func" - EXECUTE FUNCTION IN PROTECTED MODE
    AH = 51h
    STACK:    DWORD    selector:offset of function
Return: registers as returned by function
Note:    executes function with privilege level 0 (highest privilege)
SeeAlso: AH=10h"VMiX",AH=52h"VMiX"
--------B-155101-----------------------------
INT 15 - SYSTEM - later PS/2s - EXPANSION UNIT, RETURN CONFIGURATION NUMBER
    AX = 5101h
Return: CF set if successful
        AH = 00h
        AL = current configuration number
        00h system unit only
        FFh configuration not recognized
        BX = status flag
        bits 0-14: reserved
        bit 15: additional data is available (location TBD)
    CF clear on error
        AH = status
        01h expansion unit is not present
        86h function not supported
Note:    CF convention is the reverse of the standard convention for this
      interrupt.  (Perhaps a typo in the IBM BIOS Tech Ref?)
--------T-1552-------------------------------
INT 15 - VMiX v2.???+ - "sys_vm_init" - INITIALIZE PROTECTED-MODE ENVIRONMENT
    AH = 52h
SeeAlso: AH=50h"VMiX",AH=51h"VMiX"
--------d-1552-------------------------------
INT 15 C - IBM/MS INT 13 Extensions - MEDIA EJECT INTERCEPT
    AH = 52h
    DL = drive number
Return: CF clear if OK to eject media
        AH = 00h
    CF set if ejection disallowed
        AH = error code (B1h,B3h) (see #0144)
Note:    called by the IBM/MS INT 13 Extensions driver/BIOS when an ejection
      request is made
SeeAlso: INT 13/AH=46h"INT 13 Extensions"
--------p-155300-----------------------------
INT 15 - Advanced Power Management v1.0+ - INSTALLATION CHECK
    AX = 5300h
    BX = device ID of system BIOS (0000h)
Return: CF clear if successful
        AH = major version (BCD)
        AL = minor version (BCD)
        BX = 504Dh ("PM")
        CX = flags (see #0376)
    CF set on error
        AH = error code (06h,09h,86h) (see #0377)
BUG:    early versions of the Award Modular BIOS with built-in APM support
      reportedly do not set BX on return

Bitfields for APM flags:
Bit(s)    Description    (Table 0376)
 0    16-bit protected mode interface supported
 1    32-bit protected mode interface supported
 2    CPU idle call reduces processor speed
 3    BIOS power management disabled
 4    BIOS power management disengaged (APM v1.1)
 5-7    reserved

(Table 0377)
Values for APM error code:
 01h    power management functionality disabled
 02h    interface connection already in effect
 03h    interface not connected
 04h    real-mode interface not connected
 05h    16-bit protected-mode interface already connected
 06h    16-bit protected-mode interface not supported
 07h    32-bit protected-mode interface already connected
 08h    32-bit protected-mode interface not supported
 09h    unrecognized device ID
 0Ah    invalid parameter value in CX
 0Bh    (APM v1.1) interface not engaged
 0Ch    (APM v1.2) function not supported
 0Dh    (APM v1.2) Resume Timer disabled
 0Eh-1Fh reserved for other interface and general errors
 20h-3Fh reserved for CPU errors
 40h-5Fh reserved for device errors
 60h    can't enter requested state
 61h-7Fh reserved for other system errors
 80h    no power management events pending
 81h-85h reserved for other power management event errors
 86h    APM not present
 87h-9Fh reserved for other power management event errors
 A0h-FEh reserved
 FFh    undefined
--------p-155301-----------------------------
INT 15 - Advanced Power Management v1.0+ - CONNECT REAL-MODE INTERFACE
    AX = 5301h
    BX = device ID of system BIOS (0000h)
Return: CF clear if successful
    CF set on error
        AH = error code (02h,05h,07h,09h) (see #0377)
Note:    on connection, an APM v1.1 or v1.2 BIOS switches to APM v1.0
      compatibility mode until it is informed that the user supports a
      newer version of APM (see AX=530Eh)
SeeAlso: AX=5302h,AX=5303h,AX=5304h
--------p-155302-----------------------------
INT 15 R - Advanced Power Management v1.0+ - CONNECT 16-BIT PROTMODE INTERFACE
    AX = 5302h
    BX = device ID of system BIOS (0000h)
Return: CF clear if successful
        AX = real-mode segment base address of protected-mode 16-bit code
        segment
        BX = offset of entry point
        CX = real-mode segment base address of protected-mode 16-bit data
        segment
        ---APM v1.1---
        SI = APM BIOS code segment length
        DI = APM BIOS data segment length
    CF set on error
        AH = error code (02h,05h,06h,07h,09h) (see #0377)
Notes:    the caller must initialize two consecutive descriptors with the
      returned segment base addresses; these descriptors must be valid
      whenever the protected-mode interface is called, and will have
      their limits arbitrarily set to 64K.
    the protected mode interface is invoked by making a far call with the
      same register values as for INT 15; it must be invoked while CPL=0,
      the code segment descriptor must have a DPL of 0, the stack must be
      in a 16-bit segment and have enough room for BIOS use and possible
      interrupts, and the current I/O permission bit map must allow access
      to the I/O ports used for power management.
    functions 00h-03h are not available from protected mode
    on connection, an APM v1.1 or v1.2 BIOS switches to APM v1.0
      compatibility mode until it is informed that the user supports a
      newer version of APM (see AX=530Eh)
SeeAlso: AX=5301h,AX=5303h,AX=5304h
--------p-155303-----------------------------
INT 15 - Advanced Power Management v1.0+ - CONNECT 32-BIT PROTMODE INTERFACE
    AX = 5303h
    BX = device ID of system BIOS (0000h)
Return: CF clear if successful
        AX = real-mode segment base address of protected-mode 32-bit code
        segment
        EBX = offset of entry point
        CX = real-mode segment base address of protected-mode 16-bit code
        segment
        DX = real-mode segment base address of protected-mode 16-bit data
        segment
        ---APM v1.1---
        SI = APM BIOS code segment length
        DI = APM BIOS data segment length
    CF set on error
        AH = error code (02h,05h,07h,08h,09h) (see #0377)
Notes:    the caller must initialize three consecutive descriptors with the
      returned segment base addresses for 32-bit code, 16-bit code, and
      16-bit data, respectively; these descriptors must be valid whenever
      the protected-mode interface is called, and will have their limits
      arbitrarily set to 64K.
    the protected mode interface is invoked by making a far call to the
      32-bit code segment with the same register values as for INT 15; it
      must be invoked while CPL=0, the code segment descriptor must have a
      DPL of 0, the stack must be in a 32-bit segment and have enough room
      for BIOS use and possible interrupts, and the current I/O permission
      bit map must allow access to the I/O ports used for power management.
    functions 00h-03h are not available from protected mode
    on connection, an APM v1.1 or v1.2 BIOS switches to APM v1.0
      compatibility mode until it is informed that the user supports a
      newer version of APM (see AX=530Eh)
SeeAlso: AX=5301h,AX=5302h,AX=5304h
--------p-155304-----------------------------
INT 15 - Advanced Power Management v1.0+ - DISCONNECT INTERFACE
    AX = 5304h
    BX = device ID of system BIOS (0000h)
Return: CF clear if successful
    CF set on error
        AH = error code (03h,09h) (see #0377)
SeeAlso: AX=5301h,AX=5302h,AX=5303h
--------p-155305-----------------------------
INT 15 - Advanced Power Management v1.0+ - CPU IDLE
    AX = 5305h
Return: CF clear if successful (after system leaves idle state)
    CF set on error
        AH = error code (03h,0Bh) (see #0377)
Notes:    call when the system is idle and should be suspended until the next
      system event or interrupt
    should not be called from within a hardware interrupt handler to avoid
      reentrance problems
    if an interrupt causes the system to resume normal processing, the
      interrupt may or may not have been handled when the BIOS returns
      from this call; thus, the caller should allow interrupts on return
    interrupt handlers may not retain control if the BIOS allows
      interrupts while in idle mode even if they are able to determine
      that they were called from idle mode
    the caller should issue this call continuously in a loop until it needs
      to perform some processing of its own
SeeAlso: AX=1000h,AX=5306h,INT 2F/AX=1680h
--------p-155306-----------------------------
INT 15 - Advanced Power Management v1.0+ - CPU BUSY
    AX = 5306h
Return: CF clear if successful
    CF set on error
        AH = error code (03h,0Bh) (see #0377)
Notes:    called to ensure that the system runs at full speed even on systems
      where the BIOS is unable to recognize increased activity (especially
      if interrupts are hooked by other programs and not chained to the
      BIOS)
    this call may be made even when the system is already running at full
      speed, but it will create unnecessary overhead
    should not be called from within a hardware interrupt handler to avoid
      reentrance problems
SeeAlso: AX=5305h
--------p-155307-----------------------------
INT 15 - Advanced Power Management v1.0+ - SET POWER STATE
    AX = 5307h
    BX = device ID (see #0378)
    CX = system state ID (see #0379)
Return: CF clear if successful
    CF set on error
        AH = error code (01h,03h,09h,0Ah,0Bh,60h) (see #0377)
Note:    should not be called from within a hardware interrupt handler to avoid
      reentrance problems
SeeAlso: AX=530Ch

(Table 0378)
Values for APM device IDs:
 0000h    system BIOS
 0001h    all devices for which the system BIOS manages power
 01xxh    display (01FFh for all attached display devices)
 02xxh    secondary storage (02FFh for all attached secondary storage devices)
 03xxh    parallel ports (03FFh for all attached parallel ports)
 04xxh    serial ports (04FFh for all attached serial ports)
---APM v1.1+ ---
 05xxh    network adapters (05FFh for all attached network adapters)
 06xxh    PCMCIA sockets (06FFh for all)
 0700h-7FFFh reserved
 80xxh    system battery devices (APM v1.2)
 8100h-DFFFh reserved
 Exxxh    OEM-defined power device IDs
 F000h-FFFFh reserved

(Table 0379)
Values for system state ID:
 0000h    ready (not supported for device ID 0001h)
 0001h    stand-by
 0002h    suspend
 0003h    off (not supported for device ID 0001h)
---APM v1.1---
 0004h    last request processing notification (only for device ID 0001h)
 0005h    last request rejected (only for device ID 0001h)
 0006h-001Fh reserved system states
 0020h-003Fh OEM-defined system states
 0040h-007Fh OEM-defined device states
 0080h-FFFFh reserved device states
--------p-155307CX0001-----------------------
INT 15 - Advanced Power Management v1.0+ - SYSTEM STAND-BY
    AX = 5307h
    CX = 0001h
    BX = 0001h (device ID for all power-managed devices)
Return: CF clear
Notes:    puts the entire system into stand-by mode; normally called in response
      to a System Stand-by Request notification after any necessary
      processing, but may also be invoked at the caller's discretion
    should not be called from within a hardware interrupt handler to avoid
      reentrance problems
    the stand-by state is typically exited on an interrupt
SeeAlso: AX=4280h,AX=5307h/CX=0002h"SUSPEND",AX=530Bh
--------p-155307CX0002-----------------------
INT 15 - Advanced Power Management v1.0+ - SUSPEND SYSTEM
    AX = 5307h
    CX = 0002h
    BX = 0001h (device ID for all power-managed devices)
Return: after system is resumed
    CF clear
Notes:    puts the entire system into a low-power suspended state; normally
      called in response to a Suspend System Request notification after
      any necessary processing, but may also be invoked at the caller's
      discretion
    should not be called from within a hardware interrupt handler to avoid
      reentrance problems
    the caller may need to update its date and time values because the
      system could have been suspended for a long period of time
SeeAlso: AX=5307h/CX=0001h"STAND-BY",AX=530Bh
--------p-155308-----------------------------
INT 15 - Advanced Power Management v1.0+ - ENABLE/DISABLE POWER MANAGEMENT
    AX = 5308h
    BX = device ID for all devices power-managed by APM
        0001h (APM v1.1+)
        FFFFh (APM v1.0)
    CX = new state
        0000h disabled
        0001h enabled
Return: CF clear if successful
    CF set on error
        AH = error code (01h,03h,09h,0Ah,0Bh) (see #0377)
Notes:    when power management is disabled, the system BIOS will not
      automatically power down devices, enter stand-by or suspended mode,
      or perform any power-saving actions in response to AX=5305h calls
    should not be called from within a hardware interrupt handler to avoid
      reentrance problems
    the APM BIOS should never be both disabled and disengaged at the same
      time
SeeAlso: AX=5309h,AX=530Dh,AX=530Fh
--------p-155309-----------------------------
INT 15 - Advanced Power Management v1.0+ - RESTORE POWER-ON DEFAULTS
    AX = 5309h
    BX = device ID for all devices power-managed by APM
        0001h (APM v1.1)
        FFFFh (APM v1.0)
Return: CF clear if successful
    CF set on error
        AH = error code (03h,09h,0Bh) (see #0377)
Note:    should not be called from within a hardware interrupt handler to avoid
      reentrance problems
SeeAlso: AX=5308h
--------p-15530A-----------------------------
INT 15 - Advanced Power Management v1.0+ - GET POWER STATUS
    AX = 530Ah
    BX = device ID
        0001h all devices power-managed by APM
        80xxh specific battery unit number XXh (01h-FFh) (APM v1.2)
Return: CF clear if successful
        BH = AC line status
        00h off-line
        01h on-line
        02h on backup power (APM v1.1)
        FFh unknown
        other reserved
        BL = battery status (see #0380)
        CH = battery flag (APM v1.1+) (see #0381)
        CL = remaining battery life, percentage
        00h-64h (0-100) percentage of full charge
        FFh unknown
        DX = remaining battery life, time (APM v1.1) (see #0382)
        ---if specific battery unit specified---
        SI = number of battery units currently installed
    CF set on error
        AH = error code (09h,0Ah) (see #0377)
Notes:    should not be called from within a hardware interrupt handler to avoid
      reentrance problems
    supported in real mode (INT 15) and both 16-bit and 32-bit protected
      mode

(Table 0380)
Values for APM v1.0+ battery status:
 00h    high
 01h    low
 02h    critical
 03h    charging
 FFh    unknown
 other    reserved
SeeAlso: #0381,#0382

Bitfields for APM v1.1+ battery flag:
Bit(s)    Description    (Table 0381)
 0    high
 1    low
 2    critical
 3    charging
 4    selected battery not present (APM v1.2)
 5-6    reserved (0)
 7    no system battery
Note:    all bits set (FFh) if unknown
SeeAlso: #0380,#0382

Bitfields for APM v1.1+ remaining battery life:
Bit(s)    Description    (Table 0382)
 15    time units: 0=seconds, 1=minutes
 14-0    battery life in minutes or seconds
Note:    all bits set (FFFFh) if unknown
SeeAlso: #0380,#0381
--------p-15530B-----------------------------
INT 15 - Advanced Power Management v1.0+ - GET POWER MANAGEMENT EVENT
    AX = 530Bh
Return: CF clear if successful
        BX = event code (see #0383)
        CX = event information (APM v1.2) if BX=0003h or BX=0004h
        bit 0: PCMCIA socket was powered down in suspend state
    CF set on error
        AH = error code (03h,0Bh,80h) (see #0377)
Notes:    although power management events are often asynchronous, notification
      will not be made until polled via this call to permit software to
      only receive event notification when it is prepared to process
      power management events; since these events are not very time-
      critical, it should be sufficient to poll once or twice per second
    the critical resume notification is made after the system resumes
      from an emergency suspension; normally, the system BIOS only notifies
      its partner that it wishes to suspend and relies on the partner to
      actually request the suspension, but no notification is made on an
      emergency suspension
    should not be called from within a hardware interrupt handler to avoid
      reentrance problems
SeeAlso: AX=5307h,AX=5307h/CX=0001h"STAND-BY",AX=5307h/CX=0002h"SUSPEND"

(Table 0383)
Values for APM event code:
 0001h    system stand-by request
 0002h    system suspend request
 0003h    normal resume system notification
 0004h    critical resume system notification
 0005h    battery low notification
---APM v1.1---
 0006h    power status change notification
 0007h    update time notification
 0008h    critical system suspend notification
 0009h    user system standby request notification
 000Ah    user system suspend request notification
 000Bh    system standby resume notification
---APM v1.2---
 000Ch    capabilities change notification (see AX=5310h)
------
 000Dh-00FFh reserved system events
 01xxh    reserved device events
 02xxh    OEM-defined APM events
 0300h-FFFFh reserved
--------p-15530C-----------------------------
INT 15 - Advanced Power Management v1.1+ - GET POWER STATE
    AX = 530Ch
    BX = device ID (see #0378)
Return: CF clear if successful
        CX = system state ID (see #0379)
    CF set on error
        AH = error code (01h,09h) (see #0377)
SeeAlso: AX=5307h
--------p-15530D-----------------------------
INT 15 - Advanced Power Management v1.1+ - EN/DISABLE DEVICE POWER MANAGEMENT
    AX = 530Dh
    BX = device ID (see #0378)
    CX = function
        0000h disable power management
        0001h enable power management
Return: CF clear if successful
    CF set on error
        AH = error code (01h,03h,09h,0Ah,0Bh) (see #0377)
Desc:    specify whether automatic power management should be active for a
      given device
SeeAlso: AX=5308h,AX=530Fh
--------p-15530E-----------------------------
INT 15 - Advanced Power Management v1.1+ - DRIVER VERSION
    AX = 530Eh
    BX = device ID of system BIOS (0000h)
    CH = APM driver major version (BCD)
    CL = APM driver minor version (BCD) (02h for APM v1.2)
Return: CF clear if successful
        AH = APM connection major version (BCD)
        AL = APM connection minor version (BCD)
    CF set on error
        AH = error code (03h,09h,0Bh) (see #0377)
SeeAlso: AX=5300h,AX=5303h
--------p-15530F-----------------------------
INT 15 - Advanced Power Management v1.1+ - ENGAGE/DISENGAGE POWER MANAGEMENT
    AX = 530Fh
    BX = device ID (see #0378)
    CX = function
        0000h disengage power management
        0001h engage power management
Return: CF clear if successful
    CF set on error
        AH = error code (01h,09h) (see #0377)
Notes:    unlike AX=5308h, this call does not affect the functioning of the APM
      BIOS
    when cooperative power management is disengaged, the APM BIOS performs
      automatic power management of the system or device
SeeAlso: AX=5308h,AX=530Dh
--------p-155310-----------------------------
INT 15 - Advanced Power Management v1.2 - GET CAPABILITIES
    AX = 5310h
    BX = device ID (see #0378)
        0000h (APM BIOS)
        other reserved
Return: CF clear if successful
        BL = number of battery units supported (00h if no system batteries)
        CX = capabilities flags (see #0384)
    CF set on error
        AH = error code (01h,09h,86h) (see #0377)
Notes:    this function is supported via the INT 15, 16-bit protected mode, and
      32-bit protected mode interfaces; it does not require that a
      connection be established prior to use
    this function will return the capabilities currently in effect, not
      any new settings which have been made but do not take effect until
      a system restart
SeeAlso: AX=5300h,AX=530Fh,AX=5311h,AX=5312h,AX=5313h

Bitfields for APM v1.2 capabilities flags:
Bit(s)    Description    (Table 0384)
 0    can enter global standby state
 1    can enter global suspend state
 2    resume timer will wake up system from standby mode
 3    resume timer will wake up system from suspend mode
 4    Resume on Ring Indicator will wake up system from standby mode
 5    Resume on Ring Indicator will wake up system from suspend mode
 6    PCMCIA Ring Indicator will wake up system from standby mode
 7    PCMCIA Ring Indicator will wake up system from suspend mode
--------p-155311-----------------------------
INT 15 - Advanced Power Management v1.2 - GET/SET/DISABLE RESUME TIMER
    AX = 5311h
    BX = device ID (see #0378)
        0000h (APM BIOS)
        other reserved
    CL = function
        00h disable Resume Timer
        01h get Resume Timer
        02h set Resume Timer
        CH = resume time, seconds (BCD)
        DL = resume time, minutes (BCD)
        DH = resume time, hours (BCD)
        SI = resume date (BCD), high byte = month, low byte = day
        DI = resume date, year (BCD)
Return: CF clear if successful
        ---if getting timer---
        CH = resume time, seconds (BCD)
        DL = resume time, minutes (BCD)
        DH = resume time, hours (BCD)
        SI = resume date (BCD), high byte = month, low byte = day
        DI = resume date, year (BCD)
    CF set on error
        AH = error code (03h,09h,0Ah,0Bh,0Ch,0Dh,86h) (see #0377)
Notes:    this function is supported via the INT 15, 16-bit protected mode, and
      32-bit protected mode interfaces
SeeAlso: AX=5300h,AX=5310h,AX=5312h,AX=5313h
--------p-155312-----------------------------
INT 15 - Advanced Power Management v1.2 - ENABLE/DISABLE RESUME ON RING
    AX = 5312h
    BX = device ID (see #0378)
        0000h (APM BIOS)
        other reserved
    CL = function
        00h disable Resume on Ring Indicator
        01h enable Resume on Ring Indicator
        02h get Resume on Ring Indicator status
Return: CF clear if successful
        CX = resume status (0000h disabled, 0001h enabled)
    CF set on error
        AH = error code (03h,09h,0Ah,0Bh,0Ch,86h) (see #0377)
Notes:    this function is supported via the INT 15, 16-bit protected mode, and
      32-bit protected mode interfaces
SeeAlso: AX=5300h,AX=5310h,AX=5311h,AX=5313h
--------p-155313-----------------------------
INT 15 - Advanced Power Management v1.2 - ENABLE/DISABLE TIMER-BASED REQUESTS
    AX = 5313h
    BX = device ID (see #0378)
        0000h (APM BIOS)
        other reserved
    CL = function
        00h disable timer-based requests
        01h enable timer-based requests
        02h get timer-based requests status
Return: CF clear if successful
        CX = timer-based requests status (0000h disabled, 0001h enabled)
    CF set on error
        AH = error code (03h,09h,0Ah,0Bh,86h) (see #0377)
Notes:    this function is supported via the INT 15, 16-bit protected mode, and
      32-bit protected mode interfaces
SeeAlso: AX=5300h,AX=5310h,AX=5311h,AX=5312h
--------p-155380BH00-------------------------
INT 15 - APM SL Enhanced v1.0 - GET SUSPEND/GLOBAL STANDBY MODE
    AX = 5380h
    BH = 00h
Return: CF clear if successful
        AL = 82360SL Auto Power Off Timer High Count (APWR_TMRH)
        BL = sustdbymode (see #0385)
SeeAlso: AX=5380h/BH=01h,AX=5380h/BH=02h,AX=5380h/BH=7Fh

Bitfields for APM SL sustdbymode:
Bit(s)    Description    (Table 0385)
 2    ???
 1    Auto Power Off Timer Enable (APWR_TMR_EN)
 0    ???
--------p-155380BH01-------------------------
INT 15 - APM SL Enhanced v1.0 - SET SUSPEND/GLOBAL STANDBY MODE
    AX = 5380h
    BH = 01h
    BL = sustdbymode (see #0385)
Return: CF clear if successful
SeeAlso: AX=5380h/BH=00h,AX=5380h/BH=7Fh
--------p-155380BH02-------------------------
INT 15 - APM SL Enhanced v1.0 - GET GLOBAL STANDBY TIMER
    AX = 5380h
    BH = 02h
Return: CF clear if successful
    SI:DI = timer count in seconds (actually 1.024 seconds)
Desc:    reads the value of 82360SL GSTDBY_TMRH & GSTDBY_TMRL registers
SeeAlso: AX=5380h/BH=00h,AX=5380h/BH=03h,AX=5380h/BH=04h,AX=5380h/BH=7Fh
--------p-155380BH03-------------------------
INT 15 - APM SL Enhanced v1.0 - SET GLOBAL STANDBY TIMER
    AX = 5380h
    BH = 03h
    SI:DI = timer count in seconds (actually 1.024 seconds)
Return: CF clear if successful
Desc:    sets the value of 82360SL GSTDBY_TMRH & GSTDBY_TMRL registers
Note:    the maximum timer count is 268431 seconds
SeeAlso: AX=5380h/BH=02h,AX=5380h/BH=7Fh
--------p-155380BH04-------------------------
INT 15 - APM SL Enhanced v1.0 - GET AUTO POWER OFF TIMER
    AX = 5380h
    BH = 04h
Return: CF clear if successful
    SI:DI = timer count in seconds (actually 1.024 seconds)
Desc:    reads the value of 82360SL APWR_TMRH & APWR_TMRL registers
SeeAlso: AX=5380h/BH=02h,AX=5380h/BH=05h,AX=5380h/BH=06h,AX=5380h/BH=7Fh
--------p-155380BH05-------------------------
INT 15 - APM SL Enhanced v1.0 - SET AUTO POWER OFF TIMER
    AX = 5380h
    BH = 05h
    SI:DI = timer count in seconds (actually 1.024 seconds)
Return: CF clear if successful
Desc:    sets the value of 82360SL APWR_TMRH & APWR_TMRL registers
Note:    the maximum timer count is 134213 seconds
SeeAlso: AX=5380h/BH=04h,AX=5380h/BH=7Fh
--------p-155380BH06-------------------------
INT 15 - APM SL Enhanced v1.0 - GET RESUME CONDITION
    AX = 5380h
    BH = 06h
Return: CF clear if successful
        BL = resume condition (see #0386)
Desc:    reads the value of 82360SL RESUME_MASK register
SeeAlso: AX=5380h/BH=04h,AX=5380h/BH=07h,AX=5380h/BH=08h,AX=5380h/BH=7Fh

Bitfields for APM SL resume condition:
Bit(s)    Description    (Table 0386)
 7-2    reserved (0)
 1    alarm enabled (resume on CMOS alarm)
 0    ring enabled
--------p-155380BH07-------------------------
INT 15 - APM SL Enhanced v1.0 - SET RESUME CONDITION
    AX = 5380h
    BH = 07h
    BL = resume condition (see #0386)
Return: CF clear if successful
Desc:    sets the value of 82360SL RESUME_MASK register
SeeAlso: AX=5380h/BH=06h,AX=5380h/BH=7Fh
--------p-155380BH08-------------------------
INT 15 - APM SL Enhanced v1.0 - GET CALENDAR EVENT TIME
    AX = 5380h
    BH = 08h
Return: CF clear if successful
        CH = hours
        CL = minutes
        SI = seconds
    CF set on error
        AH = error code (see #0387)
Desc:    gets calendar event time from CMOS ram
SeeAlso: AX=5380h/BH=06h,AX=5380h/BH=09h,AX=5380h/BH=0Ah,AX=5380h/BH=7Fh

(Table 0387)
Values for APM SL error code:
 02h    no alarm set
 03h    no battery
--------p-155380BH09-------------------------
INT 15 - APM SL Enhanced v1.0 - SET CALENDAR EVENT TIME
    AX = 5380h
    BH = 09h
    CH = hours
    CL = minutes
    SI = seconds
Return: CF clear if successful
    CF set on error
        AH = error code (see #0387)
Desc:    sets calendar event time in CMOS ram, enables Alarm resume
SeeAlso: AX=5380h/BH=08h,AX=5380h/BH=7Fh
--------p-155380BH0A-------------------------
INT 15 - APM SL Enhanced v1.0 - GET CALENDAR EVENT DATE
    AX = 5380h
    BH = 0Ah
Return: CF clear if successful
        SI = century
        DI = year
        CH = month
        CL = day
    CF set on error
        AH = error code (see #0387)
Desc:    reads calendar event date from Extended CMOS ram
SeeAlso: AX=5380h/BH=08h,AX=5380h/BH=0Bh,AX=5380h/BH=0Ch,AX=5380h/BH=7Fh
--------p-155380BH0B-------------------------
INT 15 - APM SL Enhanced v1.0 - SET CALENDAR EVENT DATE
    AX = 5380h
    BH = 0Bh
    SI = century
    DI = year
    CH = month
    CL = day
Return: CF clear if successful
    CF set on error
        AH = error code (see #0387)
Desc:    sets calendar event date in Extended CMOS ram
SeeAlso: AX=5380h/BH=0Ah,AX=5380h/BH=7Fh
--------p-155380BH0C-------------------------
INT 15 - APM SL Enhanced v1.0 - GET CPU SPEED MODE
    AX = 5380h
    BH = 0Ch
Return: CF clear if successful
    CL = CPU clock divider (1,2,4 or 8)
    BL = autocpumode ???
Desc:    reads bits 4-5 of CPUPWRMODE register
SeeAlso: AX=5380h/BH=0Ah,AX=5380h/BH=0Dh,AX=5380h/BH=7Fh
--------p-155380BH0D-------------------------
INT 15 - APM SL Enhanced v1.0 - SET CPU SPEED MODE
    AX = 5380h
    BH = 0Dh
    CL = CPU clock divider (1,2,4 or 8)
    BL = autocpumode ???
Return: CF clear if successful
Desc:    writes bits 4-5 of CPUPWRMODE register
SeeAlso: AX=5380h/BH=0Ch,AX=5380h/BH=7Eh,AX=5380h/BH=7Fh
--------p-155380BH7E-------------------------
INT 15 - APM SL Enhanced v1.0 - SL HW PARAMETER
    AX = 5380h
    BH = 7Eh
Return: AL = ???
        03h on A-Step 386SL BIOSes
        12h on later steps
    BX = Control port (00B0h)
SeeAlso: AX=5380h/BH=00h,AX=5380h/BH=7Fh
--------p-155380BH7F-------------------------
INT 15 - Advanced Power Management v1.1 - OEM APM INSTALLATION CHECK
    AX = 5380h
    BH = 7Fh
Return: CF clear if successful
        BX = OEM identifier
        all other registers OEM-defined
        ---Intel SL Enhanced Option BIOS---
        BX = 534Ch ('SL')
        CL = 4Fh ('O')
        AL = version (10h = 1.0)
        ---HP APM BIOS---
        BX = 4850h ('HP')
        CX = version (0001h)
    CF set on error
        AH = error code (03h) (see #0377)
SeeAlso: AX=5380h/BH=00h
--------p-155380-----------------------------
INT 15 - Advanced Power Management v1.1 - OEM APM FUNCTIONS
    AX = 5380h
    BH <> 7Fh
    all other registers OEM-defined
Return: OEM-defined
SeeAlso: AX=5380h/BH=7Fh
--------X-1553B0BH00-------------------------
INT 15 - Intel System Management Bus - RESERVED
    AX = 53B0h
    BH = 00h
Program: the SMBus is a variant of ACCESS.bus being used by Intel and Duracell
      for the Smart Battery proposal, but designed to be generic enough to
      handle other devices besides batteries
--------X-1553B0BH01-------------------------
INT 15 - Intel System Management Bus - INSTALLATION CHECK
    AX = 53B0h
    BH = 01h
    BL = 72h ('r')
    CX = 6164h ('ad')
Return: CF clear if installed
        AH = SMBus BIOS Interface Specification major version (01h)
        AL = SMBus BIOS Interface Specification minor version (00h)
        BL = number of SMBus devices present
        CX = 6941h ('iA')
        DX = vendor-specified SMBus hardware code
        0000h means undefined hardware type
    CF set if error
        AH = Error code 0Ah, 86h (see #0388)
Note:    this function is only supported in INT 15h mode
SeeAlso: AX=53B0h/BH=02h,AX=53B0h/BH=03h,AX=53B0h/BH=04h,AX=53B0h/BH=06h

(Table 0388)
Values for Intel System Management Bus error codes:
 00h    SMBus OK
 01h    SMBus connect failed
 02h    SMBus already connected (see also #0389)
 03h    SMBus disconnect failed
 04h    SMBus not connected
 05h    SMBus INT 15 interface disabled
 06h    SMBus device address request out of range
 07h    SMBus unknown failure
 08h    SMBus message list empty
 09h    SMBus message list overflow
 0Ah    SMBus invalid signature
 10h    SMBus device address not acknowledged
 11h    SMBus device error detected
 12h    SMBus device command access denied
 13h    SMBus unknown error
 14h    SMBus transaction pending
 15h    SMBus no transaction pending
 16h    SMBus request does not match pending transaction
 17h    SMBus device access denied
 18h    SMBus timeout
 19h    SMBus protocol not supported
 1Ah    SMBus busy
 1Bh    SMBus SMI detected
 80h    SMBus OK (previously unreported SMI occurred)
 86h    SMBus not supported

(Table 0389)
Values for Intel System Management Bus Already Connected sub-error codes:
 01h    real mode connect already established
 02h    16-bit PMode connect already established
 03h    32-bit PMode connect already established
SeeAlso: #0388
--------X-1553B0BH02-------------------------
INT 15 - Intel System Management Bus - REAL MODE CONNECT
    AX = 53B0h
    BH = 02h
    CX = 6941h ('iA')
Return: CF clear if successful
        AX = SMBus Real mode code segment
        BX = offset of entry point into SMBus BIOS Interface
        CX = SMBus Real mode data segment
    CF set if error
        AH = error code (01h,02h,0Ah,86h) (see #0388)
        AL = sub-error code if error code is 02h (see #0389)
Desc:    connect to SMBus interface; once connected, all SMBus calls are made
      to the supplied entry point instead of INT 15 (with registers
      identical to those described here for INT 15)
Notes:    Support for this function is optional
    this function is only supported in INT 15 mode when implemented
SeeAlso: AX=53B0h/BH=01h,AX=53B0h/BH=03h,AX=53B0h/BH=04h,AX=53B0h/BH=05h
--------X-1553B0BH03-------------------------
INT 15 - Intel System Management Bus - 16-BIT PROTECTED-MODE CONNECT
    AX = 53B0h
    BH = 03h
    CX = 6941h ('iA')
Return: CF clear if successful
        AX = SMBus 16-bit code segment (real mode base address)
        BX = offset of entry point into SMBus BIOS Interface
        CX = SMBus 16-bit data segment (real mode base address)
        SI = code segment length in bytes
        DI = data segment length in bytes
    CF set if error
        AH = error code (01h,02h,0Ah,86h) (see #0388)
        AL = sub-error code if error code is 02h (see #0389)
Desc:    connect to SMBus interface; once connected, all SMBus calls are made
      to the supplied entry point instead of INT 15 (with registers
      identical to those described here for INT 15)
Notes:    before calling the entry point, two descriptors must be initialized
      in the GDT or LDT.  They must be consecutive and be in the order of
      code, then data.  At the time    of the call, the descriptors must be
      valid and have CPL=0.
    the code descriptor must be ring-0 privilege
    this function is only supported in INT 15 mode
SeeAlso: AX=53B0h/BH=01h,AX=53B0h/BH=02h,AX=53B0h/BH=04h,AX=53B0h/BH=05h
--------X-1553B0BH04-------------------------
INT 15 - Intel System Management Bus - 32-BIT PROTECTED-MODE CONNECT
    AX = 53B0h
    BH = 04h
    CX = 6941h ('iA')
Return: CF clear if successful
        AX = SMBus 32-bit code segment (real mode base address)
        EBX = offset of entry point into SMBus BIOS Interface
        CX = SMBus 16-bit code segment (real mode base address)
        DX = SMBus data segment (real mode base address)
        SI = code segment length in bytes
        DI = data segment length in bytes
    CF set if error
        AH = error code (01h,02h,0Ah,86h) (see #0388)
        AL = sub-error code if error code is 02h (see #0389)
Desc:    connect to SMBus interface; once connected, all SMBus calls are made
      to the supplied entry point instead of INT 15 (with registers
      identical to those described here for INT 15)
Notes:    before calling the entry point, two descriptors must be initialized in
      the GDT or LDT.  They must be consecutive and be in the order of
      32-bit code, 16-bit code, then data.    At the time of the call, the
      descriptors must be valid and have CPL=0.
    the code descriptors must be ring-0 privilege
    this function is supported only in INT 15 mode
SeeAlso: AX=53B0h/BH=01h,AX=53B0h/BH=02h,AX=53B0h/BH=03h,AX=53B0h/BH=05h
--------X-1553B0BH05-------------------------
INT 15 - Intel System Management Bus - DISCONNECT
    AX = 53B0h
    BH = 05h
    CX = 6941h ('iA')
Return: CF clear if successful
        AH = 00h (SMBus OK)
    CF set if error
        AH = error code (03h,04h,05h,0Ah,86h) (see #0388)
Note:    this function is supported in connected mode (far CALL entry point)
      only
SeeAlso: AX=53B0h/BH=01h,AX=53B0h/BH=02h,AX=53B0h/BH=03h,AX=53B0h/BH=04h
--------X-1553B0BH06-------------------------
INT 15 - Intel System Management Bus - GET DEVICE ADDRESSES
    AX = 53B0h
    BH = 06h
    BL = position in list to report
    CH = 6941h ('iA')
Return: CF clear if successful
        AH = 00h (SMBus OK)
        BH = number of SMBus devices
        BL = SMBus Device Address of device at position BL in list
        (see #0390)
    CF set if error
        AH = error code (06h,0Ah,86h) (see #0388)
Desc:    retrieves already assigned SMBus device addresses
Notes:    this function is supported in INT 15h mode only
    bit 0 of the device address indicates read/write, so a device may
      be listed at both xxxxxxx0b and xxxxxxx1b

(Table 0390)
Values for System Management Bus predefined device addresses:
 10h    SMBus host
 12h    Smart Battery charger
 14h    Smart Battery selector
 16h    Smart Battery
 18h    SMBus Alert response
 50h    ACCESS.bus host
 58h    LCD contrast controller
 5Ah    CCFL backlight driver
 6Eh    ACCESS.bus default address
 80h-86h PCMCIA socket controllers
 88h    VGA graphics controller
 90h-96h unrestricted addresses
 82h    SMBus device default address
--------X-1553B0BH07-------------------------
INT 15 - Intel System Management Bus - RETRIEVE CRITICAL MESSAGES
    AX = 53B0h
    BH = 07h
    CX = 6941h ('iA')
Return: CF clear if successful
        AH = 00h (SMBus OK)
        AL = device address
        BX = device message
    CF set if error
        AH = error code (05h,07h,08h,09h,0Ah,86h) (see #0388)
Desc:    retrieves oldest queued critical message from an SMBus device to the
      host
Notes:    up to five messages are queued; if the queue is full, messages will be
      lost and error 09h returned
--------X-1553B0BH08-------------------------
INT 15 - Intel System Management Bus - RESERVED
    AX = 53B0h
    BH = 08h-0Fh
--------X-1553B0BH10-------------------------
INT 15 - Intel System Management Bus - REQUEST
    AX = 53B0h
    BH = 10h
    BL = protocol (see #0391)
    CH = device address
    CL = device command (see #0392)
    DH = MSB Data or block length (for BlockWrite)
    DL = LSB Data or first byte of block (for BlockWrite)
Return: CF clear if successful
        AH = 00h or 80h (SMBus OK)
         (80h indicates a previously unreported SMI took place)
    CF set if error
        AH = error code (05h,10h,11h,12h,13h,14h,17h,19h,1Ah,86h)
          (see #0388)
Desc:    request access to a device on the SMBus
SeeAlso: AX=53B0h/BH=11h, AX=53B0h/BH=13h

(Table 0391)
Values for Intel System Management Bus protocol codes:
 00h    Quick Command
 01h    Send Byte
 02h    Receive Byte
 03h    Write Byte
 04h    Read Byte
 05h    Write Word
 06h    Read Word
 07h    Block Write
 08h    Block Read
 09h    Process Call
 0Ah-FFh reserved
SeeAlso: #0392

(Table 0392)
Values for Intel System Management Bus Smart Battery command codes:
 Cmd    Protocol(s)    Description
 00h    Rd/Wr Word    "ManufacturerAccess" implementation-specific
 01h    Rd/Wr Word    get/set Low Capacity Alarm threshold
 02h    Rd/Wr Word    get/set Remaining Time Alarm value (in minutes)
 03h    Rd/Wr Word    get/set battery characteristics (see #0393)
 04h    Rd/Wr Word    "AtRate" indicate charge/discharge rate
 05h    Read Word    "AtRateTimeToFull" time to completely charge (in min.)
 06h    Read Word    "AtRateTimeToEmpty" time to entirely discharge (min.)
 07h    Read Word    "AtRateOK" boolean: can battery supply another 10sec?
 08h    Read Word    internal battery temperature (in 0.1 Kelvins)
 09h    Read Word    current battery voltage in millivolts
 0Ah    Read Word    current flowing through battery in milliamperes
            (positive if charging, negative if discharging)
 0Bh    Read Word    average current over the past minute
 0Ch    Read Word    expected error margin in capacity computations in %
 0Dh    Read Word    predicted remaining charge as % of full charge
 0Eh    Read Word    predicted remaining charge as % of design capacity
 0Fh    Read Word    predicted remaining charge in mAh or 10mWh
 10h    Read Word    predicted full charge capacity in mAh or 10mWh
 11h    Read Word    predicted remaining battery life in minutes
            FFFFh = not discharging
 12h    Read Word    rolling average of predicted life over past minute
 13h    Read Word    rolling average of predicted charge time over past min.
            FFFFh = not charging
 14h    Read Word    get battery's desired charging current in mA
 14h    Write Word    set charging current in mA
 15h    Read Word    get battery's desired charging current in mV
 15h    Write Word    set desired charging voltage in mV
 16h    Read Word    get current battery status (see #0394)
 17h    Read Word    get number of charge/discharge cycles for battery
 18h    Read Word    get design capacity in mAh or 10mWh
 19h    Read Word    get design voltage
 1Ah    Read Word    get specification information (see #0395)
 1Bh    Read Word    get manufacture date (see #1005 at INT 21/AX=5700h)
 1Ch    Read Word    get serial number
 1Dh-1Fh        reserved
 20h    Read Block    get manufacturer's name
 21h    Read Block    get device name
 22h    Read Block    get device chemistry (see #0396)
 23h    Read Block    get manufacturer data
 24h-2Eh        reserved
 2Fh            manufacturer-specific
 30h-3Bh        reserved
 3Ch-3Fh        manufacturer-specific
Note:    bits 7-6 are reserved for addressing multiple batteries in a future
      version of the specification
SeeAlso: #0391

Bitfields for Smart Battery battery characteristics:
Bit(s)    Description    (Table 0393)
 0    battery has internal charge controller (read-only)
 1    primary/secondary battery support (read-only)
 6-2    reserved
 7    conditioning cycle requested
 8    internal charge controller enabled
 9    battery operating in primary mode
 13-10    reserved
 14    disable broadcast to charger
 15    report capacity in units of 10mW / 10mWh instead of mA / mAh
SeeAlso: #0392,#0394

Bitfields for Smart Battery battery status:
Bit(s)    Description    (Table 0394)
 15    overcharged
 14    terminate-charge alarm
 13    reserved
 12    over-temperature alarm
 11    terminate-discharge alarm
 10    reserved
 9    remaining-capacity alarm
 8    remaining-time alarm
 7    initialized
 6    charging
 5    fully charged
 4    fully discharged
 3-0    error codes
    0000 OK
    0001 busy
    0010 reserved command
    0011 unsupported command
    0100 access denied (tried to write to read-only value)
    0101 overflow/underflow
    0110 bad size
    0111 unknown error
SeeAlso: #0392,#0393,#0395

Bitfields for Smart Battery specification information:
Bit(s)    Description    (Table 0395)
 3-0    SmartBattery specification minor revision number
 7-4    SmartBattery specification version number
 11-8    voltage scaling (0-3, multiply voltages by 10^scale)
 15-12    current scaling (0-3, multiply currents by 10^scale)
SeeAlso: #0392,#0394

(Table 0396)
Values for Smart Battery device chemistry (not case-sensitive):
 "LION"    Lithium ion
 "NiMH"    Nickel metal hydride
 "PbAc"    lead-acid
 "NiCd" Nickel Cadmium
 "NiZn" Nickel Zinc
 "RAM"    rechargeable Alkaline Manganese
 "ZnAr" Zinc-Air
SeeAlso: #0392
--------X-1553B0BH11-------------------------
INT 15 - Intel System Management Bus - REQUEST CONTINUATION
    AX = 53B0h
    BH = 11h
    BL = protocol (see #0391)
    CH = device address
    CL = number of valid bytes in DX (1 or 2)
    DH = MSB Data (CL = 1 or 2)
    DL = LSB Data (CL = 2)
Return: CF clear if successful
        AH = 00h (SMBus OK)
        CL = SMBus status
        00h SMBus hardware not ready for more data
        01h SMBus hardware ready for 2 more data bytes
    CF set if error
        AH = error code (05h,11h,13h,15h,16h,18h,1Bh,86h) (see #0388)
Desc:    continue WriteBlock protocol started with function 10h
SeeAlso: AX=53B0h/BH=10h, AX=53B0h/BH=13h
--------X-1553B0BH12-------------------------
INT 15 - Intel System Management Bus - REQUEST ABORT
    AX = 53B0h
    BH = 12h
    BL = protocol (see #0391)
    CH = device address
    CL = device command
Return: CF clear if successful
        AH = 00h (SMBus OK)
    CF set if error
        AH = error code (05h,13h,15h,16h,86h) (see #0388)
Desc:    stop the currently pending SMBus request; usually used to terminate
      a request after an SMI Detected error
--------X-1553B0BH13-------------------------
INT 15 - Intel System Management Bus - REQUEST DATA AND STATUS
    AX = 53B0h
    BH = 13h
    BL = protocol (see #0391)
    CH = device address
    CL = device command
Return: CF clear if successful
        AH = 00h (SMBus OK)
        CH = status
        00h no data pending, transaction complete
        01h no data pending, transaction continues
        02h data pending
        CL = number of valid bytes in DX (0-2)
        DH = MSB data
        DL = LSB data
    CF set if error
        AH = error code (05h,10h,11h,13h,15h,16h,18h,1Bh,86h) (see #0388)
Desc:    determine when a transaction is complete, gather data returned by read
      transactions
Note:    for Block Read protocol (08h), first call returns block    length in DH
      and the first byte of the block in DL
--------T-155400-----------------------------
INT 15 C - Omniview Multitasker - INSTALLATION NOTIFICATION
    AX = 5400h
    ES:BX -> device information tables
    DI:DX -> dispatcher entry point
Note:    called by OmniView to notify programs loaded before OmniView of state
      changes inside OmniView
SeeAlso: AX=5407h,INT 2F/AX=DE00h
--------T-155401-----------------------------
INT 15 C - Omniview Multitasker - PROCESS CREATION
    AX = 5401h
    ES:BX = process handle
Note:    called by OmniView to notify programs loaded before OmniView of state
      changes inside OmniView
SeeAlso: AX=5402h,INT 2F/AX=DE04h
--------T-155402-----------------------------
INT 15 C - Omniview Multitasker - PROCESS DESTRUCTION
    AX = 5402h
    ES:DX = process handle
Note:    called by OmniView to notify programs loaded before OmniView of state
      changes inside OmniView
SeeAlso: AX=5401h,INT 2F/AX=DE05h
--------T-155403-----------------------------
INT 15 C - Omniview Multitasker - SAVE
    AX = 5403h
    ES:DX = process swapping out
Note:    called by OmniView to notify programs loaded before OmniView of state
      changes inside OmniView
SeeAlso: AX=5404h,INT 2F/AX=DE08h
--------T-155404-----------------------------
INT 15 C - Omniview Multitasker - RESTORE
    AX = 5404h
    ES:DX = process swapping in
Note:    called by OmniView to notify programs loaded before OmniView of state
      changes inside OmniView
SeeAlso: AX=5403h,INT 2F/AX=DE09h
--------T-155405-----------------------------
INT 15 C - Omniview Multitasker - SWITCHING TO BACKGROUND
    AX = 5405h
    ES:DX = process swapping in
Note:    called by OmniView to notify programs loaded before OmniView of state
      changes inside OmniView
SeeAlso: AX=5406h
--------T-155406-----------------------------
INT 15 C - Omniview Multitasker - SWITCHING TO FOREGROUND
    AX = 5406h
    ES:DX = process swapping in
Note:    called by OmniView to notify programs loaded before OmniView of state
      changes inside OmniView
SeeAlso: AX=5405h
--------T-155407-----------------------------
INT 15 C - Omniview Multitasker - EXIT NOTIFICATION
    AX = 5407h
Note:    called by OmniView to notify programs loaded before OmniView of state
      changes inside OmniView
SeeAlso: AX=5400h,INT 2F/AX=DE03h
--------b-1560------------------------------------
INT 15 - HUNTER 16 - SET SYSTEM CLOCK SPEED
    AH = 60h
    AL = new speed
        00h normal (8 MHz)
        01h Slow Mode 1 (4 MHz)
        02h Slow Mode 2 (2 MHz)
Note:    the Husky Hunter 16 is an 8088-based ruggedized laptop.     Other family
      members are the Husky Hunter, Husky Hunter 16/80, and Husky Hawk.
SeeAlso: AX=6301h
--------p-156000-----------------------------
INT 15 U - HP 100LX/200LX - GET MAIN BATTERY LEVEL
    AX = 6000h
Return: AX = battery level
Note:    multiply the returned value with 1Bh and add 622h to get millivolts
SeeAlso: AX=6001h,AX=6002h,AX=6003h,AX=6004h
--------p-156001-----------------------------
INT 15 U - HP 100LX/200LX - GET BACKUP BATTERY LEVEL
    AX = 6001h
Return: AX = battery level
Note:    multiply the returned value with 1Bh and add 622h to get millivolts
SeeAlso: AX=6000h,AX=6002h
--------p-156002-----------------------------
INT 15 U - HP 100LX/200LX - GET POWER INFO
    AX = 6002h
Return: AL = power settings (see #0397)
SeeAlso: AX=6000h,AX=6003h,AX=6004h

Bitfields for power settings:
Bit(s)    Description    (Table 0397)
 0-1    unused ???
 2    card battery status low (OK if bit clear)
 3    battery charging off (disabled if bits 3-5 clear)
 4    battery charging slow
 5    battery charging fast
 6    power adaptor active
 7    battery type NiCad (alkaline if bit clear)
--------p-156003-----------------------------
INT 15 U - HP 100LX/200LX - SET MAIN BATTERY TYPE
    AX = 6003h
    BL = battery type
        00h alkaline
        01h NiCad
SeeAlso: AX=6000h,AX=6004h
--------p-156004-----------------------------
INT 15 U - HP 100LX/200LX - SET BATTERY CHARGING MODE
    AX = 6004h
    BL = charging
        00h disabled
        01h enabled
SeeAlso: AX=6000h,AX=6003h
--------b-1561------------------------------------
INT 15 - HUNTER 16 - GET POWER LEVEL
    AH = 61h
Return: AH = percentage of full power left (0..100)
Desc:    determine how much battery power is left
SeeAlso: AH=62h,AH=66h,AH=73h"HUNTER"
--------b-1561-------------------------------
INT 15 U - HP 100LX/200LX - SET ANNOUNCIATORS POSITION
    AH = 61h
    AL = position (20h = left, 60h = right)
Note:    The announciators are the indicator symbols for the Shift and Fn keys
      in the bottom line
SeeAlso: AH=62h"HP",INT 16/AH=02h
--------b-1562------------------------------------
INT 15 - HUNTER 16 - SET LOW POWER THRESHOLD
    AH = 62h
    AL = level (00h 5%, 01h 10%, ... 12h 95%)
    BX = interval between power low warnings in seconds (1..600)
Return: AH = Status
Desc:    set the level (relative to full power) when power-low warnings begin
      and the interval between the warnings
SeeAlso: AH=61h,AH=65h,AH=66h
--------b-1562-------------------------------
INT 15 U - HP 100LX/200LX - SET DISPLAY CONTRAST
    AH = 62h
    BL = contrast (00h-1Fh, 1Fh is the darkest)
SeeAlso: AH=47h"HP",AH=61h"HP"
--------b-156300----------------------------------
INT 15 - HUNTER 16 - GET IDLE TIMEOUT
    AX = 6300h
Return: AH = status
    BX = timeout in seconds (0-3600)
Desc:    get the idle timeout value, the interval without keyboard or
       communications activity before the system shuts down
SeeAlso: AX=6301h
--------b-156301----------------------------------
INT 15 - HUNTER 16 - SET IDLE TIMEOUT
    AX = 6301h
    BX = timeout in seconds (0-3600)
Desc:    sets the idle timeout value, the interval without keyboard or
      communications activity before the system shuts down
SeeAlso: AX=6300h
--------b-1564------------------------------------
INT 15 - HUNTER 16 - CONTROL RESUME MODE
    AH = 64h
    AL = new state
        00h disable Resume mode
        01h enable Resume mode
Return: AH = status
Desc:    turn Resume mode on or off. In Resume mode the system starts in
      the application that was running when it shut down as if nothing
      had happened.
SeeAlso: AH=67h,AH=68h,AH=69h
--------b-1565------------------------------------
INT 15 - HUNTER 16 - AUTHORISE CHARGING
    AH = 65h
    AL = charging level
        01h charging not allowed
        02h charging allowed until power down
        03h charging allowed until batteries changed or fail.
        Ask user if charging is still allowed on next poweron
        04h charging allowed indefinitely
    BX = 0203h
    CX = 0405h
    DX = 0607h
Return: AH = status
SeeAlso: AH=66h,AH=68h
--------b-1566------------------------------------
INT 15 - HUNTER 16 - SET BATTERY LEVEL
    AH = 66h
    AL = level in percent of maximum (0..100)
Return: AH = status
SeeAlso: AH=61h,AH=65h
--------b-1567------------------------------------
INT 15 - HUNTER 16 - CONTROL STOP MODE
    AH = 67h
    AL = mode when waiting for input
        00h use STOP mode (allows communication)
        01h use HALT mode (disallows communication)
Return: AH = status
Desc:    select the power save mode to use when waiting for input
SeeAlso: AH=69h
--------b-1568------------------------------------
INT 15 - HUNTER 16 - REQUEST POWER DOWN
    AH = 68h
Desc:    turns off the Hunter 16 if power down is allowed (see AH=69h)
SeeAlso: AH=69h
--------b-1569------------------------------------
INT 15 - HUNTER 16 - CONTROL POWER DOWN AVAILABILITY
    AH = 69h
    AL = mode
        00h inhibit power down
        01h allow power down
Return: AH = status
SeeAlso: AH=67h,AH=68h,AH=6Ah
--------b-156A------------------------------------
INT 15 - HUNTER 16 - CONTROL SLOW MODE
    AH = 6Ah
    AL = mode
        00h inhibit Slow mode
        01h allow Slow mode
Return: AH = status
SeeAlso: AH=69h
--------b-156B------------------------------------
INT 15 - HUNTER 16 - GET ROM BIOS VERSION
    AH = 6Bh
Return: BH = version number (ASCII)
    BL = release number (ASCII)
    CH = major??? release number (ASCII)
    CL = minor??? release number (ASCII)
SeeAlso: AH=6Ch
--------b-156C------------------------------------
INT 15 - HUNTER 16 - GET SERIAL NUMBER
    AH = 6Ch
Return: BL:CX = BCD serial number
Note:    when shipped, all Hunter 16s have the same Serial Number, but a
      different number can be stored (see AH=72h)
SeeAlso: AH=6Bh,AH=72h
--------b-156D------------------------------------
INT 15 - HUNTER 16 - GET EVENT DETAIL
    AH = 6Dh
Return: AH = 00h if successful
    CX:BX = event flags bit 0..31 (see #0398)
Note:    this function allows testing for events
SeeAlso: AH=6Eh,AH=6Fh

Bitfields for HUNTER 16 events:
Bit(s)    Description    (Table 0398)
 6    RI received
 5    RTC Alarm
 4    data received on COM2
 3    data received on COM1
 2    error on COM2
 1    error on COM1
 0    PWR button pressed
--------b-156E------------------------------------
INT 15 - HUNTER 16 - ENABLE/TRAP EVENT
    AH = 6Eh
    AL = Software Interrupt
          00h  do not trap event
          else trap as software interrupt number AL
    BH = event number (see AH=6Dh)
    BL = enable mask
        00h disable event
        01h enable event
Return: AH = 00h if successful
SeeAlso: AH=6Dh,AH=6Fh
--------b-156F------------------------------------
INT 15 - HUNTER 16 - ACKNOWLEDGE EVENT
    AH = 6Fh
    AL = event number (see AH=6Dh)
Return: AH = 00h if successful
Desc:    Acknowledges the event, so the next similar event can be detected
SeeAlso: AH=6Dh"HUNTER",AH=6Eh
--------b-1570------------------------------------
INT 15 - HUNTER 16 - CONTROL SOUND
    AH = 70h
    AL = new state
        00h disable sound
        else enable sound
Note:    the Husky Hunter 16 is an 8088-based ruggedized laptop.     Other family
      members are the Husky Hunter, Husky Hunter 16/80, and Husky Hawk.
--------x-157000-----------------------------
INT 15 - Tandy 1000SL/TL - READ FROM EEPROM
    AX = 7000h
    BL = number of word to read (00h-3Fh)
Return: CF clear if function supported
        DX = contents of EEPROM word
Note:    newer Tandy 1000-series machines use EEPROM instead of CMOS RAM in
      the clock chip to store system configuration information
SeeAlso: AX=7001h
--------x-157001-----------------------------
INT 15 - Tandy 1000SL/TL - WRITE TO EEPROM
    AX = 7001h
    BL = number of word to read (00h-3Fh)
    DX = new value for EEPROM word
Return: CF clear if function supported
Note:    the EEPROMs are normally written only by the system setup program;
      changing the values can badly mess up a Tandy
SeeAlso: AX=7000h
----------157002-----------------------------
INT 15 U - Tandy 1000 Model ??? - GET ROM PAGE
    AX = 7002h
Return: AL = ROM page mapped at 0E0000h (0-6 (13?))
Note:    some Tandy machines have DOS and DeskMate in a 512k paged ROM.    The
      BIOS uses this call to determine what ROM page is mapped in the 64k
      segment at 0E0000h.
    the 1000TL has 8 64k ROM pages; page 7 is permanently mapped at
      0F0000h.  There may be 16 32k ROM pages on other systems.
SeeAlso: AX=7003h,INT E0"DeskMate"
----------157003-----------------------------
INT 15 U - Tandy 1000 Model ??? - SET ROM PAGE
    AX = 7003h
    DL = ROM page to be mapped at 0E0000h (0-6 (13?))
Return: CF clear if valid ROM page specified
Note:    Some Tandy machines have DOS and DeskMate in a 512k paged ROM.    The
      BIOS uses this call to map ROM pages in the 64k segment at 0E0000h.
    The 1000TL has 8 64k ROM pages; page 7 is permanently mapped at
      0F0000h.  There may be 16 32k ROM pages on other systems.
SeeAlso: AX=7002h,INT E0"DeskMate"
--------b-1571------------------------------------
INT 15 - HUNTER 16 - SELECT POWER UP KEYS
    AH = 71h
    BL = column
    BH = row
    AL = column switch (00h disable, 01h enable)
    CL = row switch (00h disable, 01h enable)
Return: AH = status
SeeAlso: AH=7Bh,AH=88h
--------b-157200----------------------------------
INT 15 - HUNTER 16 - RESET SERIAL NUMBER
    AX = 7200h
Return: AH = 00h if successful
Desc:    reset the serial number to the default serial number present when the
      Hunter 16 was shipped
SeeAlso: AH=6Ch,AH=72h
--------b-1572------------------------------------
INT 15 - HUNTER 16 - REDIRECT SERIAL NUMBER
    AH = 72h
    AL nonzero
    DS:BX -> new serial number (6 ASCII digits)
Return: AH = 00h if successful
Desc:    install a new serial number
SeeAlso: AH=6Ch,AX=7200h
--------b-1573------------------------------------
INT 15 - HUNTER 16 - GET ORACLE GT POWER LEVEL
    AH = 73h
    AL = drive (0: A:, 1: B:)
Return: AH = status
        00h successful
        FFh Oracle GT drive not connected
    AL = power level in percent of maximum (0..100)
Desc:    get the power remaining in the Oracle GT batteries
SeeAlso: AH=61h
--------b-1574------------------------------------
INT 15 - HUNTER 16 - SET BACKLIGHT POWER UP STATE
    AH = 74h
    AL = new level
        01h off
        02h unchanged
        03h change level
        BL = desired level (00h-7Fh)
Return: AH = status
Desc:    select the backlight level to use when the Hunter is next turned on
SeeAlso: AH=64h,AH=75h,INT 10/AH=64h,INT 10/AH=78h
--------b-1575------------------------------------
INT 15 - HUNTER 16 - SET CONTRAST POWER UP STATE
    AH = 75h
    AL = new level
        01h off
        02h unchanged
        03h change level
        BL = desired level (00h-7Fh)
Return: AH = status
Desc:    select the LCD contrast level to use when the Hunter is next turned on
SeeAlso: AH=63h,AH=74h
--------b-1576------------------------------------
INT 15 - HUNTER 16 - CONTROL POWER SAVE
    AH = 76h
    BX = power save control (see #0399)
SeeAlso: AH=74h

Bitfields for HUNTER 16 power save control:
Bit(s)    Description    (Table 0399)
 0    power save enabled
 1    inhibit power save when waiting for COM1 data
 2    inhibit power save when waiting for COM2 data
 3    inhibit power save when waiting for data from barcode wand
 4    inhibit power up on timer tick
--------b-1579------------------------------------
INT 15 - HUNTER 16 - REDIRECT LPT1
    AH = 79h
    AL = port to which to redirect (00h COM1, 01h COM2)
--------b-157A------------------------------------
INT 15 - HUNTER 16 - INVOKE HOT KEY
    AH = 7Ah
Desc:    this function has the same effect as pressing the HOT key
SeeAlso: AH=7Bh
--------b-157B------------------------------------
INT 15 - HUNTER 16 - CONTROL HOT KEY
    AH = 7Bh
    AL = 00h prevent HOT key
        else allow HOT key
Desc:    Allow or prevent the HOT key function which is used to examine and
      change the Hunter setup
SeeAlso: AH=71h,AH=7Ah,AH=7Ch
--------b-157C------------------------------------
INT 15 - HUNTER 16 - CONTROL HOT KEY POWER OPTION
    AH = 7Ch
    AL = 00h prevent HOT key power option
        else allow HOT key power option
Desc:    allow or prevent changing the power options
SeeAlso: AH=7Bh,AH=7Dh
--------b-157D------------------------------------
INT 15 - HUNTER 16 - OVERRIDE LOW POWER TURN OFF
    AH = 7Dh
    AL = 00h turn off after 10 warnings
        else never turn off
Desc:    specify whether the Hunter 16 turns off after 10 low power warnings
SeeAlso: AH=7Ch
--------b-157E------------------------------------
INT 15 - HUNTER 16 - CONTROL BATTERY CHANGE FACILITIES (APM)
    AH = 7Eh
    AL = 00h do not prompt
        else prompt
Desc:    select whether the user is prompted for the battery state if the
      battery cap has been off when the system is turned on
SeeAlso: AH=7Fh
--------b-157F------------------------------------
INT 15 - HUNTER 16 - SET BATTERY TYPE (APM)
    AH = 7Fh
    AL = battery type
        00h     non-rechargeable
        else rechargeable
SeeAlso: AH=7Eh
--------B-1580-------------------------------
INT 15 C - OS HOOK - DEVICE OPEN (AT,XT286,PS)
    AH = 80h
    BX = device ID
    CX = process ID
    CF clear
Return: CF clear if successful
        AH = 00h
    CF set on error
        AH = status (see #0400)
Note:    this function should be hooked by a multitasker which wishes to keep
      track of device ownership; the default BIOS handler merely returns
      successfully
SeeAlso: AH=81h,AH=82h

(Table 0400)
Values for status:
 80h    invalid command (PC,PCjr)
 86h    function not supported (XT)
--------b-1580------------------------------------
INT 15 - HUNTER 16 - GET/SET BATTERY CAPACITY (APM)
    AH = 80h
    AL = function
        00h get
        Return: AL = capacity (500mA + AL * 50mA, max 40 = 2500mA)
        else set
        BL = battery capacity (same as AL above)
SeeAlso: AH=61h"HUNTER",AH=81h"HUNTER"
--------B-1581-------------------------------
INT 15 C - OS HOOK - DEVICE CLOSE
    AH = 81h
    BX = device ID
    CX = process ID
    CF clear
Return: CF clear if successful
        AH = 00h
    CF set on error
        AH = status (see #0400)
Note:    this function should be hooked by a multitasker which wishes to keep
      track of device ownership; the default BIOS handler merely returns
      successfully
SeeAlso: AH=80h,AH=82h
--------b-1581------------------------------------
INT 15 - HUNTER 16 - CONTROL POWER OUTPUT
    AH = 81h
    AL = new state of power output (00h off, nonzero on)
Desc:    turn the +5V low power output on or off
SeeAlso: AH=80h"HUNTER"
--------B-1582-------------------------------
INT 15 C - OS HOOK - PROGRAM TERMINATION
    AH = 82h
    BX = process ID
    CF clear
Return: CF clear if successful
        AH = 00h
    CF set on error
        AH = status (see #0400)
Notes:    closes all devices opened by the given process ID with function 80h
    this function should be hooked by a multitasker which wishes to keep
      track of device ownership; the default BIOS handler merely returns
      successfully
SeeAlso: AH=80h,AH=81h
--------b-1582------------------------------------
INT 15 - HUNTER 16 - SOUND OUTPUT
    AH = 82h
    DX = length (duration in seconds = DX * 666670 / frequency)
    BX = pitch (see #0401)
Desc:    Sound the tone specified in BX for the duration in DX
SeeAlso: AX=1019h

(Table 0401)
Values for HUNTER 16 sound pitch:
BX(dec)     Note    Frequency    BX(dec)     Note    Frequency
  425    G    1568.000     1515    A     440.000
  451    F#    1479.503     1605    G#     415.307
  477    F    1396.900     1701    G     392.000
  506    E    1318.500     1802    F#     369.998
  536    D#    1244.523     1909    F     349.230
  568    D    1174.700     2022    E     329.630
  601    C#    1108.749     2143    D#     311.127
  637    C    1046.500     2270    D     293.660
  675    B     958.770     2405    C#     277.183
  715    A#     932.329     2548    MID C     261.630
  758    A     880.000     2700    B     246.940
  803    G#     830.609     2860    A#     233.081
  850    G     783.990     3030    A     220.000
  901    F#     739.990     3210    G#     207.654
  954    F     698.460     3401    G     196.000
 1011    E     659.260     3604    F#     184.996
 1071    D#     622.257     3818    F     174.610
 1135    D     587.330     4045    E     164.810
 1203    C#     554.365     4286    D#     155.560
 1274    C     523.250     4540    D     146.830
 1350    B     493.880     4668    C#     142.827
 1430    A#     466.162     4803    C     138.810
--------B-1583-------------------------------
INT 15 - BIOS - SET EVENT WAIT INTERVAL (AT,PS50+)
    AH = 83h
    AL = subfunction
        00h set interval
        CX:DX = microseconds to delay
        ES:BX -> byte whose high bit is to be set at end of interval
        01h cancel wait interval
Return: CF set on error or function already busy
        AH = status
        80h invalid command (PC,PCjr)
        86h function not supported (XT and later)
    CF clear if successful
Notes:    the resolution of the wait period is 977 microseconds on most systems
      because most BIOSes use the 1/1024 second fast interrupt from the AT
      real-time clock chip which is available on INT 70
    IBM AT 1/10/84 BIOS ignores AL and always performs subfunction 00h
SeeAlso: AH=41h,AH=86h,INT 70
--------b-1583------------------------------------
INT 15 - HUNTER 16 - CONTROL SCREEN SYNCHRONISATION
    AH = 83h
    AL = state of LCD window (00h disabled, nonzero enabled)
Desc:    Enable/disable the facility where the displayed window tracks the
      cursor output to keep the focus visible
--------B-1584-------------------------------
INT 15 - BIOS - JOYSTICK SUPPORT (XT after 11/8/82,AT,XT286,PS)
    AH = 84h
    DX = subfunction
        0000h read joystick switches
        Return: AL bits 7-4 = switch settings
        0001h read positions of joysticks
        Return: AX = X position of joystick A
            BX = Y position of joystick A
            CX = X position of joystick B
            DX = Y position of joystick B
Return: CF set on error
        AH = status (see #0400)
    CF clear if successful
Notes:    if no game port is installed, subfunction 0000h returns AL=00h (all
      switches open) and subfunction 0001h returns AX=BX=CX=DX=0000h
    a 250kOhm joystick typically returns 0000h-01A0h
SeeAlso: AH=84h"V20-XT-BIOS"
--------b-1584-------------------------------
INT 15 - V20-XT-BIOS - JOYSTICK SUPPORT
    AH = 84h
    DX = subfunction
        0000h read joystick switches
        Return: AL bits 7-4 = switch settings
        other: read positions of joysticks as indicated by bits 0-3
        Return: AX = X position of joystick A (if DX bit 0 set)
            BX = Y position of joystick A (if DX bit 1 set)
            CX = X position of joystick B (if DX bit 2 set)
            DX = Y position of joystick B (if DX bit 3 set)
Return: CF set on error
        AH = status (see #0400)
    CF clear if successful
Program: V20-XT-BIOS is a ROM BIOS replacement with extensions by Peter
       Koehlmann / c't magazine
SeeAlso: AH=84h"PS",INT 10/AH=0Eh/CX=ABCDh
--------b-158400----------------------------------
INT 15 - HUNTER 16 - GET DISKETTE PORT
    AX = 8400h
    BH = Drive (0: A:, 1: B:)
Return: AL = Port (0: COM1, >0: COM2)
Desc:    return the COM port used for the floppy drive
SeeAlso: AX=8401h
--------b-158401----------------------------------
INT 15 - HUNTER 16 - SET DISKETTE PORT
    AX = 8401h
    BH = Drive (0: A:, 1: B:)
    BL = Port (0: COM1, >0: COM2)
Desc:    set the COM port used for the floppy drive
SeeAlso: AX=8400h
--------B-1585-------------------------------
INT 15 C - OS HOOK - SysReq KEY ACTIVITY (AT,PS)
    AH = 85h
    AL = SysReq key action (00h pressed, 01h released)
    CF clear
Return: CF clear if successful
        AH = 00h
    CF set on error
        AH = status (see #0400)
Notes:    called by keyboard decode routine
    the default handler simply returns successfully; programs which wish
      to monitor the SysReq key must hook this call
    the SysReq key is often labeled SysRq
SeeAlso: INT 09
--------b-158500----------------------------------
INT 15 - HUNTER 16 - RESTORE POWER MENU (APM)
    AX = 8500h
Desc:    restore the standard power menu
SeeAlso: AX=8501h"HUNTER"
--------b-158501----------------------------------
INT 15 - HUNTER 16 - SET POWER MENU (APM)
    AX = 8501h
    BL = user software interrupt number
Desc:    install an alternate power menu routine
SeeAlso: AX=8500h"HUNTER"
--------B-1586-------------------------------
INT 15 - BIOS - WAIT (AT,PS)
    AH = 86h
    CX:DX = interval in microseconds
Return: CF clear if successful (wait interval elapsed)
    CF set on error or AH=83h wait already in progress
        AH = status (see #0400)
Note:    the resolution of the wait period is 977 microseconds on most systems
      because most BIOSes use the 1/1024 second fast interrupt from the AT
      real-time clock chip which is available on INT 70
SeeAlso: AH=41h,AH=83h,INT 1A/AX=FF01h,INT 70
--------b-1586------------------------------------
INT 15 - HUNTER 16 - GET/SET SCREEN ATTRIBUTE TABLE
    AH = 86h
    AL = function (00h get, nonzero set)
    BX = 1234h
    DS:SI -> 256-byte Attribute buffer
Note:    In text modes each character has its attribute byte XOR'd with the
      corresponding byte in the attribute table.  If the attribute is 15,
      15 is XOR'd with Table[15]
--------B-1587-------------------------------
INT 15 - SYSTEM - COPY EXTENDED MEMORY
    AH = 87h
    CX = number of words to copy (max 8000h)
    ES:SI -> global descriptor table (see #0403)
Return: CF set on error
    CF clear if successful
    AH = status (see #0402)
Notes:    copy is done in protected mode with interrupts disabled by the default
      BIOS handler; many 386 memory managers perform the copy with
      interrupts enabled
    this function is incompatible with the OS/2 compatibility box
SeeAlso: AH=88h,AH=89h,INT 1F/AH=90h

(Table 0402)
Values for extended-memory copy status:
 00h    source copied into destination
 01h    parity error
 02h    interrupt error
 03h    address line 20 gating failed
 80h    invalid command (PC,PCjr)
 86h    unsupported function (XT,PS30)

Format of global descriptor table:
Offset    Size    Description    (Table 0403)
 00h 16 BYTEs    zeros (used by BIOS)
 10h    WORD    source segment length in bytes (2*CX-1 or greater)
 12h  3 BYTEs    24-bit linear source address, low byte first
 15h    BYTE    source segment access rights (93h)
 16h    WORD    zero
 18h    WORD    destination segment length in bytes (2*CX-1 or greater)
 1Ah  3 BYTEs    24-bit linear destination address, low byte first
 1Dh    BYTE    destination segment access rights (93h)
 1Eh 18 BYTEs    zeros (used by BIOS)
--------b-1587------------------------------------
INT 15 - HUNTER 16 - SET INT 72h VECTOR
    AH = 87h
    DS:DX = new service routine
Desc:    set the INT 72h vector which is called in 2 cases:
      - when the machine is about to turn off or reboot, INT 72h is called
        with AH=0
      - when the machine is powering up INT 72h is called with AH=01h
Note:    the actual INT 72h vector must also be changed with INT 21/AH=25h
--------B-1588-------------------------------
INT 15 - SYSTEM - GET EXTENDED MEMORY SIZE (286+)
    AH = 88h
Return: CF clear if successful
        AX = number of contiguous KB starting at absolute address 100000h
    CF set on error
        AH = status
        80h invalid command (PC,PCjr)
        86h unsupported function (XT,PS30)
Notes:    TSRs which wish to allocate extended memory to themselves often hook
      this call, and return a reduced memory size.    They are then free to
      use the memory between the new and old sizes at will.
    the standard BIOS only returns memory between 1MB and 16MB; use AH=C7h
      for memory beyond 16MB
    not all BIOSes correctly return the carry flag, making this call
      unreliable unless one first checks whether it is supported through
      a mechanism other than calling the function and testing CF
SeeAlso: AH=87h,AH=8Ah"Phoenix",AH=C7h,AX=DA88h
--------b-1588------------------------------------
INT 15 - HUNTER 16 - GET POWER UP KEYS
    AH = 88h
Return: AH = 00h
    BX = column
    CL = row
SeeAlso: AH=71h
--------B-1589-------------------------------
INT 15 - SYSTEM - SWITCH TO PROTECTED MODE
    AH = 89h
    BL = interrupt number of IRQ0 (IRQ1-7 use next 7 interrupts)
    BH = interrupt number of IRQ8 (IRQ9-F use next 7 interrupts)
    ES:SI -> GDT for protected mode (see #0404)
Return: CF set on error
       AH = FFh  error enabling address line 20
    CF clear if successful
       AH = 00h
       in protected mode at specified address
Notes:    BL and BH must be multiples of 8
    the protected-mode CS must reference the same memory as the CS this
      function is called from because execution continues with the address
      following the interrupt call
SeeAlso: AH=87h,AH=88h,INT 67/AX=DE0Ch

Format of BIOS switch-to-protected-mode Global Descriptor Table:
Offset    Size    Description    (Table 0404)
 00h  8 BYTEs    null descriptor (initialize to zeros)
 08h  8 BYTEs    GDT descriptor (see #0405)
 10h  8 BYTEs    IDT descriptor
 18h  8 BYTEs    DS descriptor
 20h  8 BYTEs    ES
 28h  8 BYTEs    SS
 30h  8 BYTEs    CS
 38h  8 BYTEs    uninitialized, used to build descriptor for BIOS CS

Format of segment descriptor table entry:
Offset    Size    Description    (Table 0405)
 00h    WORD    segment limit, low word
 02h  3 BYTEs    segment base address, low 24 bits
 05h    BYTE    access mode (see #0406)
 06h    BYTE    386+ extended access mode (see #0407)
 07h    BYTE    386+ segment base address, high 8 bits
SeeAlso: #0404,INT 2C/AX=0002h,INT 31/AX=0009h

Bitfields for segment descriptor table access mode field:
Bit(s)    Description    (Table 0406)
 3-0    segment type
 4    descriptor type (1 = application, 0 = system)
 6-5    descriptor privilege level
 7    segment is present in RAM
SeeAlso: #0405,#0407

Bitfields for 386+ segment descriptor table extended access mode field:
Bit(s)    Description    (Table 0407)
 3-0    high 4 bits of segment limit
 4    available
 5    reserved (0)
 6    default operation size (1 = 32 bits, 0 = 16 bits)
 7    granularity (1 = 4K, 0 = byte)
SeeAlso: #0405,#0406,#1892
--------b-158900----------------------------------
INT 15 - HUNTER 16 - GET POWER MODE
    AX = 8900h
Return: AH = 00h
    BL = current power mode
        00h Standard Power Mode (SPM)
        01h Advanced Power Mode (APM)
SeeAlso: AX=8901h
--------b-158901----------------------------------
INT 15 - HUNTER 16 - SET POWER MODE
    AX = 8901h
    BL = new mode
        00h Standard Power Mode (SPM)
        01h Advanced Power Mode (APM)
Return: AH = 00h
SeeAlso: AX=8900h
--------b-158A------------------------------------
INT 15 - HUNTER 16 - CONTROL POWER INPUT (SPM)
    AH = 8Ah
    AL = new state of Power Input (00h disabled, nonzero enabled)
    SI = 1234h
    DI = 5678h
Return: AH = status
        00h success
        FFh failure
Desc:    Enable or disable Power Input. When Power Input is disabled the AC
      adapter will neither charge the batteries nor supply power to the
      Hunter 16. Disable Power Input if using Alkaline batteries.
--------b-158A-------------------------------
INT 15 - Phoenix BIOS v4.0 - GET BIG MEMORY SIZE
    AH = 8Ah
Return: DX:AX = extended memory size in K
SeeAlso: AH=88h,AX=E801h,AX=E820h
--------b-158B------------------------------------
INT 15 - HUNTER 16 - GET/SET CHARGER TEMPERATURE OVERRIDE
    AH = 8Bh
    AL = function
        00h get
        Return:    BH = Maximum charging temperature
                Temp = -20 + (n * 0.63) degrees Centigrade
            BL = Minimum charging temperature
        else set
        BH = maximum charging temperature (as above)
        BL = minimum charging temperature (as above)
Return: AH = status
        00h success
        FFh failure
Desc:    get/set the temperature interval within which the charger should
      operate
--------b-158C------------------------------------
INT 15 - HUNTER 16 - GET/SET POWER SAVE ENTRY FLAG
    AH = 8Ch
    AL = function
        00h get
        Return: BX = which operations disable power save (see #0408)
        else set
        BX = which operations should disable power save (see #0408)
SeeAlso: AH=8Dh

Bitfields for HUNTER 16 operations disabling power save:
Bit(s)    Description    (Table 0408)
 0    INT 10h prevents power save
 1    INT 13h prevents power save
 2    INT 14h prevents power save
 3    INT 15h prevents power save
 4    INT 1Ah prevents power save
 5    INT 21h prevents power save
 6    direct write to video RAM prevents power save
 7    access to 8250 UART prevents power save
 8    access to 8253 (Sound) prevents power save
--------b-158D------------------------------------
INT 15 - HUNTER 16 - GET/SET BOOST CHARGE (SPM)
    AH = 8Dh
    AL = function
        00h get
        Return: AL = Fast Charge state (00h prevented, else allowed)
        nonzero set
        BH = Fast Charge state (00h prevent, nonzero allow)
Return: AH = status
        00h success
        FFh failure
Desc:    control whether Fast Charging (200ma rather than 70ma) is allowed
SeeAlso: AH=8Ch
--------B-1590-------------------------------
INT 15 - OS HOOK - DEVICE BUSY (AT,PS)
    AH = 90h
    AL = device type (see #0409)
    ES:BX -> request block for type codes 80h through BFh
    CF clear
Return: CF set if wait time satisfied
    CF clear if driver must perform wait
        AH = 00h
Notes:    type codes are allocated as follows:
      00-7F non-reentrant devices; OS must arbitrate access
      80-BF reentrant devices; ES:BX points to a unique control block
      C0-FF wait-only calls, no complementary INT 15/AH=91h call
    floppy and hard disk BIOS code uses this call to implement a timeout;
      for device types 00h and 01h, a return of CF set means that the
      timeout expired before the disk responded.
    this function should be hooked by a multitasker to allow other tasks
      to execute while the BIOS is waiting for I/O completion; the default
      handler merely returns with AH=00h and CF clear
SeeAlso: AH=91h,INT 13/AH=00h,INT 17/AH=00h,INT 1A/AH=83h

(Table 0409)
Values for device type:
 00h    disk
 01h    diskette
 02h    keyboard
 03h    PS/2 pointing device
 21h    waiting for keyboard input (Phoenix BIOS)
 80h    network
 FBh    digital sound (Tandy)
 FCh    disk reset (PS)
 FDh    diskette motor start
 FEh    printer
--------B-1591-------------------------------
INT 15 - OS HOOK - DEVICE POST (AT,PS)
    AH = 91h
    AL = device type (see #0409)
    ES:BX -> request block for type codes 80h through BFh
    CF clear
Return: AH = 00h
Note:    this function should be hooked by a multitasker to allow other tasks
      to execute while the BIOS is waiting for I/O completion; the default
      handler merely returns with AH=00h and CF clear
SeeAlso: AH=90h
--------x-15A100-----------------------------
INT 15 U - AMI PCI BIOS - SET ??? FLAG
    AX = A100h
Return: AX = 0000h
    CF clear
    BX,CX,DI may be destroyed
Desc:    sets bit 7 of CMOS RAM location 37h and updates the CMOS checksum in
      locations 3Eh and 3Fh
Notes:    in the examined version of the BIOS, nonzero values in AL cause it to
      drop through to checking the next possible value of AH, i.e. only
      subfunction 00h is supported
    also supported by Dell XPS P90 and IBM PS/PV 6384, which also use
      AMI BIOSes
----------15B001CX5354-----------------------
INT 15 - Stac ??? - INSTALLATION CHECK
    AX = B001h
    CX = 5354h ('ST')
    DX = 4143h ('AC')
Return: AX = 4F4Bh ('OK') if installed
Note:    this function is called by Novell DOS 7 NWCACHE v1.01
--------n-15BA10-----------------------------
INT 15 - HP OmniShare - Pen Driver - REPORT PEN CONTROL AREA EVENT
    AX = BA10h
    BL = event
       00h the pen left control areas
       01h the pen entered the Brightness- area
       02h the pen entered the Brightness+ area
       03h the pen entered the Contrast- area
       04h the pen entered the Contrast+ area
Return: CF clear if successfully processed
    CF set on error (function not supported, ie. not an OmniShare BIOS)
Note:    The pen driver is responsible for detecting when the pen enters and
      leaves control areas of the OmniShare tablet, and notifying the BIOS.
    The BIOS manages the events, including the autorepetition, and sets
      the status LEDs.
SeeAlso: AX=BA20h,AX=BA13h
--------n-15BA11-----------------------------
INT 15 - HP OmniShare - Pen Driver - SET THE COMMUNICATION LED STATE
    AX = BA11h
    BL = new LED state (00h steady, 01h flashing)
Return: CF clear if successful
    CF set on error
Note:    this function is for use by communication software to give visual
      feedback of active communications even if the display is in standby
      mode.
SeeAlso: AX=BA10h,AX=BA24h
--------n-15BA12-----------------------------
INT 15 - HP OmniShare - Pen Driver - STORE PEN BATTERY CHARGE
    AX = BA12h
    BL = new battery state (00h good, 01h low charge)
Return: CF set on error
    CF clear if successfully stored in CMOS
Note:    The last report will be displayed by the Power-On Self Test the next
      time the OmniShare boots.  This allows something meaningful to be
      reported even if the pen is not detected during the POST.
SeeAlso: AX=BA13h
--------n-15BA13-----------------------------
INT 15 - HP OmniShare - Pen Driver - GET PEN BATTERY CHARGE
    AX = BA13h
Return: CF clear if successful
        BL = pen battery state (00h good, 01h low charge)
    CF set on error
Note:    returns the last value set by AX=BA12h.
SeeAlso: AX=BA12h
--------p-15BA20-----------------------------
INT 15 - HP OmniShare - STANDBY.COM - INSTALLATION CHECK
    AX = BA20h
Return: CF clear if successful (installed)
    CF set on error (not installed)
Notes:    The display controller can enter a standby mode after a given timeout,
      to conserve power or (for the OmniShare) to increase the life of
      the backlight.
    A side effect of standby mode is that the communications LED turns on
      automatically when the display is in standby mode.  This is done in
      hardware, and is intended to show that the unit is still on.
SeeAlso: AX=BA10h,AX=BA20h,AX=BA22h,AX=BA24h,AX=BA26h
--------p-15BA21-----------------------------
INT 15 - HP OmniShare - STANDBY.COM - SET STANDBY DURATION
    AX = BA21h
    BL = new timeout before standby mode in minutes (01h-0Fh)
        00h to disable automatic switch to standby mode
Return: CF clear if successful
    CF set on error (function not supported)
Note:    The actual timeout with a GD6205 controller is ((N*64)-32) seconds,
      instead of (N*60) seconds as documented.
SeeAlso: AX=BA20h,AX=BA22h
--------p-15BA22-----------------------------
INT 15 - HP OmniShare - STANDBY.COM - GET STANDBY DURATION
    AX = BA22h
Return: CF clear if successful
       BL = standy duration in minutes (01h-0Fh), or 00h if disabled
    CF set on error (function not supported)
Note:    The actual timeout with a GD6205 controller is ((N*64)-32) seconds,
      instead of (N*60) seconds as documented.
SeeAlso: AX=BA20h,AX=BA21h
--------p-15BA23-----------------------------
INT 15 - HP OmniShare - STANDBY.COM - TURN ON THE SCREEN IMMEDIATELY
    AX = BA23h
Return: CF clear if successful
    CF set on error
SeeAlso: AX=BA11h,AX=BA20h,AX=BA24h
--------p-15BA24-----------------------------
INT 15 - HP OmniShare - STANDBY.COM - TURN OFF THE SCREEN IMMEDIATELY
    AX = BA24h
Return: CF clear if successful
    CF set on error
Note:    This function is not implemented yet. Reserved for future versions
      of the OmniShare.
SeeAlso: AX=BA11h,AX=BA20h,AX=BA23h
--------p-15BA25-----------------------------
INT 15 - HP OmniShare - STANDBY.COM - PREPARE FOR UNINSTALL
    AX = BA25h
Return: CF clear if successful
        AX = 25BAh
        BX = PSP of STANDBY.COM resident portion
        DX:CX -> previous INT 15 handler
    CF set on error
Note:    This function is used internally by the STANDBY.COM /u option, and
      should not be used by application programs.
SeeAlso: AX=BA20h
--------p-15BA26-----------------------------
INT 15 - HP OmniShare - STANDBY.COM - IS THE DISPLAY IN STANDBY MODE?
    AX = BA26h
Return: CF clear if successful
        AL    = display state (00h active, 01h in standby mode)
    CF set on error (function not supported)
SeeAlso: AX=BA20h,AX=BA23h
--------p-15BA27-----------------------------
INT 15 - HP OmniShare - STANDBY.COM - RESERVED FUNCTIONS
    AX = BA27h to BA2Fh
Desc:    reserved for future use
--------b-15BC-------------------------------
INT 15 - Phoenix 386 BIOS - DETERMINE CPU SPEED FOR DELAY LOOPS
    AH = BCh
Return: CF clear
    (Phoenix 1.10 10a) BYTE 0040h:00B0h set to delay loop count
    (Dell 4xxDE BIOS A11) WORD 0040h:00ECh set to delay loop count
Note:    this function reads system timer channel 0 twice, then does
      calculations on the returned values to determine the delay loop
      counter needed by the BIOS for beeps and floppy timeouts
SeeAlso: AX=2305h
--------E-15BF00-----------------------------
INT 15 - Rational Systems DOS/16M - ???
    AX = BF00h
    ???
Return: ???
Note:    under DESQview/X 1.02 DVDOS4GX.DVR, this call is identical to AX=BF02h
SeeAlso: AX=BF02h
--------E-15BF01-----------------------------
INT 15 - Rational Systems DOS/16M - ???
    AX = BF01h
    ???
Return: ???
Notes:    under DESQview/X 1.02 DVDOS4GX.DVR, this call is identical to AX=BF02h
    called by DOS/4GW
SeeAlso: AX=BF00h,AX=BF02h
--------E-15BF02DX0000-----------------------
INT 15 - Rational Systems DOS/16M - INSTALLATION CHECK
    AX = BF02h
    DX = 0000h
Return: DX = nonzero if installed
        DX:SI -> XBRK structure (see #0410)
Note:    this function is also supported by DOS/4G
SeeAlso: AX=BF01h,AX=BFDCh,AX=BFDEh/BX=0000h
SeeAlso: INT 21/AH=FFh/DH=0Eh,INT 2F/AH=A1h,INT 2F/AX=F100h,INT 2F/AX=FBA1h

Format of DOS/16M XBRK structure:
Offset    Size    Description    (Table 0410)
 00h    DWORD    linear address of first available byte
 04h    DWORD    linear address of last available byte + 1 ???
 08h    DWORD    real-mode address of XBRK structure???
 0Ch    DWORD    ???
 10h  2 BYTEs    ???
 12h    WORD    segment of ???
 14h  8 BYTEs    ???
 1Ch 512 BYTEs    protected-mode IDT
21Ch  N BYTEs    protected-mode GDT
--------E-15BF03-----------------------------
INT 15 - Rational Systems DOS/4GW - UNINSTALL???
    AX = BF03h
    BX = PSP segment of extender
    ???
Return: ???
Note:    if BX is not the PSP segment of the extender, it passes the call down
      the INT 15 chain; this allows nested instances of the extender
SeeAlso: AX=BF06h
--------E-15BF04-----------------------------
INT 15 - Rational Systems DOS/4GW - ???
    AX = BF04h
    BX = PSP segment of extender
Return: nothing???
Notes:    if BX is not the PSP segment of the extender, it passes the call down
      the INT 15 chain; this allows nested instances of the extender
    grabs INT 2Fh and installs handlers for INT 2F/AX=1605h-1607h
SeeAlso: INT 2F/AX=1607h/BX=22C0h
--------E-15BF05-----------------------------
INT 15 - Rational Systems DOS/4GW - INITIALIZE PROTECTED-MODE INTERFACE
    AX = BF05h
    BX = PSP segment of extender
Return: nothing???
Notes:    if BX is not the PSP segment of the extender, it passes the call down
      the INT 15 chain; this allows nested instances of the extender
    calls INT 67/AX=DE01h if ???
--------E-15BF06-----------------------------
INT 15 - Rational Systems DOS/4GW - ???
    AX = BF06h
    BX = PSP segment of extender
    ???
Return: ???
Note:    if BX is not the PSP segment of the extender, it passes the call down
      the INT 15 chain; this allows nested instances of the extender
SeeAlso: AX=BF03h
--------E-15BFDCDX0000-----------------------
INT 15 - Rational Systems DOS/4GW - INSTALLATION CHECK
    AX = BFDCh
    DX = 0000h
    SI = 0000h
Return: DX = nonzero if installed
        DX:SI -> XBRK structure (see #0410)
SeeAlso: AX=BF02h
--------E-15BFDEBX0000-----------------------
INT 15 - DESQview/X - DVDOS4GX.DVR - INSTALLATION CHECK
    AX = BFDEh
    BX = 0000h
Return: AX = ??? (0003h)
    BX = FFFFh
SeeAlso: AX=BF02h
--------E-15BFDEBX0001-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET PROCESS MANAGER NAME
    AX = BFDEh
    BX = 0001h
Return: BX = 0000h (success)
    CX:DX -> name of process manager executable
SeeAlso: AX=BFDEh/BX=0000h
--------E-15BFDEBX0002-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - SET ???
    AX = BFDEh
    BX = 0002h
    CX:DX -> ???
Return: BX = 0000h (success)
SeeAlso: AX=BFDEh/BX=0000h,AX=BFDEh/BX=0003h
--------E-15BFDEBX0003-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET ???
    AX = BFDEh
    BX = 0003h
Return: BX = 0000h (success)
    CX:DX -> ???
SeeAlso: AX=BFDEh/BX=0000h,AX=BFDEh/BX=0002h
--------E-15BFDEBX0004-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - ???
    AX = BFDEh
    BX = 0004h
    CL = ???
Return: BX = 0000h (success)
    CX:DX -> XBRK structure (see #0410)
SeeAlso: AX=BFDEh/BX=0000h
--------E-15BFDEBX0005-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - ???
    AX = BFDEh
    BX = 0005h
    CX = new value for ???
Return: BX = 0000h (success)
    AX = old value of ???
    DS:SI -> ??? (if AX nonzero on return)
    ES:DI -> ??? (if AX zero on return)
Note:    called by DOS4GW.EXE
SeeAlso: AX=BFDEh/BX=0000h
--------E-15BFDEBX0006-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET ???
    AX = BFDEh
    BX = 0006h
Return: BX = 0000h (success)
    AH = interrupt number??? (BEh)
    CX:DX = ???
SeeAlso: AX=BFDEh/BX=0000h,AX=BFDEh/BX=0007h,INT BE"DESQview"
--------E-15BFDEBX0007-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - SET ???
    AX = BFDEh
    BX = 0007h
    CX:DX = ???
Return: BX = 0000h (success)
SeeAlso: AX=BFDEh/BX=0000h,AX=BFDEh/BX=0006h
--------E-15BFDEBX0008-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - ???
    AX = BFDEh
    BX = 0008h
    CX = segment of ???
    DS = ???
Return: BX = status
        0000h successful
        AL = ??? (80h or C0h)
        DX = ??? (0603h) if AL=C0h
        0001h failed
        AX = 0000h
Note:    called by DOS4GW.EXE
SeeAlso: AX=BFDEh/BX=0000h
--------E-15BFDEBX0009-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET PROTECTED MODE PROGRAM LOADER
    AX = BFDEh
    BX = 0009h
Return: BX = 0000h (success)
    CX:DX -> full pathname to LOAD32.EXP
SeeAlso: AX=BFDEh/BX=0000h
--------E-15BFDEBX000A-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - DECREMENT ???
    AX = BFDEh
    BX = 000Ah
Return: BX = 0000h (success)
    AX = new value of ??? counter
Notes:    also resets a variety of values if the counter goes negative
    called by DOS4GW.EXE
SeeAlso: AX=BFDEh/BX=0000h,AX=BFDEh/BX=000Bh
--------E-15BFDEBX000B-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - INCREMENT ???
    AX = BFDEh
    BX = 000Bh
Return: AX = new value of ??? counter
Note:    called by DOS4GW.EXE
SeeAlso: AX=BFDEh/BX=0000h,AX=BFDEh/BX=000Ah
--------E-15BFDEBX000C-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - ???
    AX = BFDEh
    BX = 000Ch
    CL = ???
        00h
        nonzero
Return: ???
SeeAlso: AX=BFDEh/BX=0000h
--------E-15BFDEBX000D-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - ???
    AX = BFDEh
    BX = 000Dh
    ???
Return: ???
SeeAlso: AX=BFDEh/BX=0000h
--------E-15BFDEBX000E-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - ???
    AX = BFDEh
    BX = 000Eh
    DX:CX -> ???
Return: AX = segment of handle for calling task
    BX = ??? (probably destroyed)
    DX:CX -> ???
SeeAlso: AX=BFDEh/BX=0000h,AX=BFDEh/BX=000Fh,AX=BFDEh/BX=0013h
--------E-15BFDEBX000F-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - ???
    AX = BFDEh
    BX = 000Fh
Return: AX = segment of handle for calling task
    BX = ??? (probably destroyed)
    DX:CX -> ???
Note:    identical to AX=BFDEh/BX=000Eh with CX:DX = 0000h:0000h
SeeAlso: AX=BFDEh/BX=000Eh,AX=BFDEh/BX=0010h
--------E-15BFDEBX0010-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET TASK HANDLE
    AX = BFDEh
    BX = 0010h
Return: AX = segment of caller's task handle
    BX destroyed
SeeAlso: AX=BFDEh/BX=000Fh
--------E-15BFDEBX0011-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET ???
    AX = BFDEh
    BX = 0011h
Return: CX = code segment of DVDOS4GX.DVR
    BX = ??? (0004h)
SeeAlso: AX=BFDEh/BX=0000h
--------E-15BFDEBX0012-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET ???
    AX = BFDEh
    BX = 0012h
Return: DX = code segment of DVDOS4GX.DVR
    BX = ??? (012Ch)
    CX = ??? (0006h)
SeeAlso: AX=BFDEh/BX=0000h
--------E-15BFDEBX0013-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET ???
    AX = BFDEh
    BX = 0013h
Return: DX:CX -> ???
SeeAlso: AX=BFDEh/BX=000Eh
--------E-15BFDEBX0014-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - LOCK ??? MAILBOX
    AX = BFDEh
    BX = 0014h
    CX = index of ??? mailbox
        (0000h-0004h valid, but no range checking done)
Return: AX,BX destroyed
SeeAlso: AX=BFDEh/BX=0015h,AX=BFDEh/BX=0017h
--------E-15BFDEBX0015-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - UNLOCK ??? MAILBOX
    AX = BFDEh
    BX = 0015h
    CX = index of ??? mailbox
        (0000h-0004h valid, but no range checking done)
Return: AX,BX destroyed
SeeAlso: AX=BFDEh/BX=0014h,AX=BFDEh/BX=0016h
--------E-15BFDEBX0016-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - CHECK IF ??? MAILBOX OWNED
    AX = BFDEh
    BX = 0016h
    CX = index of ??? mailbox
        (0000h-0004h valid, but no range checking done)
Return: AX = status
        0000h no one owns mailbox
        0001h mailbox has an owner
    BX destroyed
SeeAlso: AX=BFDEh/BX=0015h,AX=BFDEh/BX=0017h
--------E-15BFDEBX0017-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET ??? MAILBOX OWNER
    AX = BFDEh
    BX = 0017h
    CX = index of ??? mailbox
        (0000h-0004h valid, but no range checking done)
Return: AX = segment of mailbox owner's handle
    BX = segment of caller's task handle
SeeAlso: AX=BFDEh/BX=0015h,AX=BFDEh/BX=0016h
--------E-15BFDEBXFFFD-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET ???
    AX = BFDEh
    BX = FFFDh
Return: CX:DX = ???
SeeAlso: AX=BFDEh/BX=FFFEh
--------E-15BFDEBXFFFE-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - SET ???
    AX = BFDEh
    BX = FFFEh
    CX:DX = ???
SeeAlso: AX=BFDEh/BX=FFFDh
--------E-15BFDEBXFFFF-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - NOP
    AX = BFDEh
    BX = FFFFh
SeeAlso: AX=BFDEh/BX=0000h
--------B-15C0-------------------------------
INT 15 - SYSTEM - GET CONFIGURATION (XT after 1/10/86,AT mdl 3x9,CONV,XT286,PS)
    AH = C0h
Return: CF set if BIOS doesn't support call
    CF clear on success
        ES:BX -> ROM table (see #0411)
    AH = status
        00h successful
        86h unsupported function
Notes:    the 1/10/86 XT BIOS returns an incorrect value for the feature byte
    the configuration table is at F000h:E6F5h in 100% compatible BIOSes
    Dell machines contain the signature "DELL" or "Dell" at absolute FE076h
      and a model byte at absolute address FE845h (see #0417)
    Hewlett-Packard machines contain the signature "HP" at F000h:00F8h and
      a product identifier at F000h:00FAh (see #0420)
    Compaq machines can be identified by the signature string "COMPAQ" at
      F000h:FFEAh, and is preceded by additional information (see #0418)
    Tandy 1000 machines contain 21h in the byte at F000h:C000h and FFh in
      the byte at FFFFh:000Eh; Tandy 1000SL/TL machines only provide the
      first three data bytes (model/submodel/revision) in the returned
      table
    Toshiba laptops contain the signature "TOSHIBA" at FE010h as part of
      a laptop information record at F000h:E000h (see #0421)
    some AST machines contain the string "COPYRIGHT AST RESEARCH" one byte
      past the end of the configuration table
    the Phoenix 386 BIOS contains a second version and date string
      (presumably the last modification for that OEM version) beginning at
      F000h:FFD8h, with each byte doubled (so that both ROM chips contain
      the complete information)
SeeAlso: AH=C7h,AH=C9h,AX=D100h,AX=D103h

Format of ROM configuration table:
Offset    Size    Description    (Table 0411)
 00h    WORD    number of bytes following
 02h    BYTE    model (see #0416)
 03h    BYTE    submodel (see #0416)
 04h    BYTE    BIOS revision: 0 for first release, 1 for 2nd, etc.
 05h    BYTE    feature byte 1 (see #0412)
 06h    BYTE    feature byte 2 (see #0413)
 07h    BYTE    feature byte 3 (see #0414)
 08h    BYTE    feature byte 4 (see #0415)
 09h    BYTE    feature byte 5:
        reserved (0) (IBM)
        ??? (08h) (Phoenix 386 v1.10)
        ??? (0Fh) (Phoenix 486 v1.03 PCI)
---AWARD BIOS---
 0Ah  N BYTEs    AWARD copyright notice
---Phoenix BIOS---
 0Ah    BYTE    ??? (00h)
 0Bh    BYTE    major version
 0Ch    BYTE    minor version (BCD)
 0Dh  4 BYTEs    ASCIZ string "PTL" (Phoenix Technologies Ltd)
---Quadram Quad386---
 0Ah 17 BYTEs    ASCII signature string "Quadram Quad386XT"

Bitfields for feature byte 1:
Bit(s)    Description    (Table 0412)
 7    DMA channel 3 used by hard disk BIOS
 6    2nd 8259 installed
 5    Real-Time Clock installed
 4    INT 15/AH=4Fh called upon INT 09h
 3    wait for external event (INT 15/AH=41h) supported
 2    extended BIOS area allocated (usually at top of RAM)
 1    bus is Micro Channel instead of ISA
 0    system has dual bus (Micro Channel + ISA)
SeeAlso: #0411,#0413

Bitfields for feature byte 2:
Bit(s)    Description    (Table 0413)
 7    reserved
 6    INT 16/AH=09h (keyboard functionality) supported (see #0484)
 5    INT 15/AH=C6h (get POS data) supported
 4    INT 15/AH=C7h (return memory map info) supported
 3    INT 15/AH=C8h (en/disable CPU functions) supported
 2    non-8042 keyboard controller
 1    data streaming supported
 0    reserved
SeeAlso: #0411,#0414,AH=C6h,AH=C7h,AH=C8h,INT 16/AH=09h

Bitfields for feature byte 3:
Bit(s)    Description    (Table 0414)
 7-5    reserved
 4    ??? (set on 1992 PS/1's, N51SX, CL57SX, 35SX?, 40SX?)
 3    SCSI subsystem supported on system board
 2    information panel installed
 1    IML (Initial Machine Load) system
 0    SCSI supported in IML
SeeAlso: #0411,#0413,#0414

Bitfields for feature byte 4:
Bit(s)    Description    (Table 0415)
 7    ??? (set on N51SX, CL57SX)
 6-4    reserved
 3    ??? (set on some 1992 PS/1's, 35SX, 40SX)
 2-1    reserved
 0    ??? (set on N51SX, CL57SX, 57SX)
SeeAlso: #0411,#0414

(Table 0416)
Values for model/submodel/revision:
Model  Submdl  Rev    BIOS date    System
 FFh    *    *    04/24/81    PC (original)
 FFh    *    *    10/19/81    PC (some bugfixes)
 FFh    *    *    10/27/82    PC (HD, 640K, EGA support)
 FFh    00h    rev      ???        Tandy 1000SL
 FFh    01h    rev      ???        Tandy 1000TL
 FFh    46h    ***      ???        Olivetti M15
 FEh    *    *    08/16/82    PC XT
 FEh    *    *    11/08/82    PC XT and Portable
 FEh    *    *    ../..x..    Toshiba laptops up to ~1987
                    ("x"=product ID) (see #0422)
 FEh    43h    ***      ???        Olivetti M240
 FEh    A6h    ???      ???        Quadram Quad386
 FDh    *    *    06/01/83    PCjr
 FCh    *    *    01/10/84    AT models 068,099 6 MHz 20MB
 FCh    *    *    02/25/93    Linux DOSEMU (all versions)
 FCh    00h    00h      ???        PC3270/AT
 FCh    00h    01h    06/10/85    AT model  239      6 MHz 30MB
 FCh    00h    > 01h      ???        7531/2 Industrial AT
 FCh    01h    00h    11/15/85    AT models 319,339 8 MHz, Enh Keyb, 3.5"
 FCh    01h    00h    09/17/87    Tandy 3000
 FCh    01h    00h    ../..x..    Toshiba laptops since ~1988
                    ("x"=product ID) (see #0422)
 FCh    01h    00h    03/08/93    Compaq DESKPRO/i
 FCh    01h    00h     various    Compaq DESKPRO, SystemPro, ProSignia
 FCh    01h    00h    07/20/93    Zenith Z-Lite 425L
 FCh    01h    00h    04/09/90    AMI BIOS
 FCh    01h    20h    06/10/92    AST
 FCh    01h    30h      ???        Tandy 3000NL
 FCh    01h    ???      ???        Compaq 286/386
 FCh    02h    00h    04/21/86    PC XT-286
 FCh    02h    00h     various    Compaq LTE Lite
 FCh    02h    00h    08/05/93    Compaq Contura 486/486c/486cx
 FCh    02h    00h    08/11/88    SoftWindows 1.0.1 (Power Macintosh)
 FCh    04h    00h    02/13/87     ** PS/2 Model 50 (10 MHz/1 ws 286)
 FCh    04h    01h    05/09/87    PS/2 Model 50 (10 Mhz 286, LW-type 32)
 FCh    04h    02h      ???        PS/2 Model 50
 FCh    04h    02h    01/28/88    PS/2 Model 50Z (10 Mhz 286, LW-type 33)
 FCh    04h    03h    04/18/88    PS/2 Model 50Z (10 MHz/0 ws 286)
 FCh    04h    04h      ???        PS/2 Model 50Z
 FCh    05h    00h    02/13/87     ** PS/2 Model 60 (10 MHz 286)
 FCh    06h    00h      ???        IBM 7552-140 "Gearbox"
 FCh    06h    01h      ???        IBM 7552-540 "Gearbox"
 FCh    08h    ***      ???        Epson, unknown model
 FCh    08h    00h      ???        PS/2 Model 25/286
 FCh    09h    00h      ???        PS/2 Model 25 (10 MHz 286)
 FCh    09h    00h    08/25/88    PS/2 Model 30 286 (10 Mhz, LW-type 37)
 FCh    09h    02h    06/28/89    PS/2 Model 30-286
 FCh    09h    02h    06/28/89    PS/2 Model 25 286 (10 Mhz, LW-type 37)
 FCh    0Bh    00h    12/01/89    PS/1 (LW-Type 44)
 FCh    0Bh    00h    02/16/90    PS/1 Model 2011 (10 MHz 286)
 FCh    20h    00h    02/18/93    Compaq ProLinea
 FCh    30h    ***      ???        Epson, unknown model
 FCh    31h    ***      ???        Epson, unknown model
 FCh    33h    ***      ???        Epson, unknown model
 FCh    42h    ***      ???        Olivetti M280
 FCh    45h    ***      ???        Olivetti M380 (XP 1, XP3, XP 5)
 FCh    48h    ***      ???        Olivetti M290
 FCh    4Fh    ***      ???        Olivetti M250
 FCh    50h    ***      ???        Olivetti M380 (XP 7)
 FCh    51h    ***      ???        Olivetti PCS286
 FCh    52h    ***      ???        Olivetti M300
 FCh    81h    00h    01/15/88    Phoenix 386 BIOS v1.10 10a
 FCh    81h    01h      ???        "OEM machine"
 FCh    82h    01h      ???        "OEM machine"
 FCh    94h    00h      ???        Zenith 386
 FBh    00h    01h    01/10/86    PC XT-089, Enh Keyb, 3.5" support
 FBh    00h    01h    05/13/94    HP 200LX 2MB BIOS 1.01 A D german
 FBh    00h    02h    05/09/86    PC XT
 FBh    00h    04h    08/19/93    HP 100LX 1MB BIOS 1.04 A
 FBh    4Ch    ***      ???        Olivetti M200
 FAh    00h    00h    09/02/86    PS/2 Model 30 (8 MHz 8086)
 FAh    00h    01h    12/12/86    PS/2 Model 30
 FAh    00h    02h    02/05/87    PS/2 Model 30
 FAh    01h    00h    06/26/87    PS/2 Model 25/25L (8 MHz 8086)
 FAh    30h    00h      ???        IBM Restaurant Terminal
 FAh    4Eh    ***      ???        Olivetti M111
 FAh    FEh    00h      ???        IBM PCradio 9075
 F9h    00h    00h    09/13/85    PC Convertible
 F9h    FFh    00h      ???        PC Convertible
 F8h    00h    00h    03/30/87     ** PS/2 Model 80 (16MHz 386)
 F8h    00h    00h      ???        PS/2 Model 75 486 (33Mhz 486)
 F8h    01h    00h    10/07/87    PS/2 Model 80 (20MHz 386)
 F8h    02h    00h      ???        PS/2 Model 55-5571
 F8h    04h    00h    01/29/88    PS/2 Model 70 (20 Mhz 386DX,LW-type 33)
 F8h    04h    02h    04/11/88    PS/2 Model 70 20MHz, type 2 system brd
 F8h    04h    03h    03/17/89    PS/2 Model 70 20MHz, type 2 system brd
 F8h    05h    00h      ???        IBM PC 7568
 F8h    06h    00h      ???        PS/2 Model 55-5571
 F8h    07h    00h      ???        IBM PC 7561/2
 F8h    07h    01h      ???        PS/2 Model 55-5551
 F8h    07h    02h      ???        IBM PC 7561/2
 F8h    07h    03h      ???        PS/2 Model 55-5551
 F8h    09h    00h    01/29/88    PS/2 Model 70 16MHz 386DX, type 1 sysbd
 F8h    09h    02h    04/11/88    PS/2 Model 70 some models
 F8h    09h    03h    03/17/89    PS/2 Model 70 some models
 F8h    09h    04h    12/15/89    PS/2 Model 70 (16 Mhz 386, LW-type 33)
 F8h    0Bh    00h    01/18/89    PS/2 Model P70 (8573-121) typ 2 sys brd
 F8h    0Bh    02h    12/16/89    PS/2 Model P70 ??
 F8h    0Ch    00h    11/02/88    PS/2 Model 55SX (16 MHz 386SX)
 F8h    0Dh    00h      ???        PS/2 Model 70 25MHz, type 3 system brd
 F8h    0Dh    00h    06/08/88    PS/2 Model 70 386 25MHz, type 3 sys brd
 F8h    0Dh    01h    02/20/89    PS/2 Model 70 386 25MHz, type 3 sys brd
 F8h    0Dh    ???    12/01/89    PS/2 Model 70 486 25Mhz, type 3 sys brd
 F8h    0Eh    00h      ???        PS/1 486SX
 F8h    0Fh    00h      ???        PS/1 486DX
 F8h    10h    00h      ???        PS/2 Model 55-5551
 F8h    11h    00h    10/01/90    PS/2 Model 90 XP (25 MHz 486)
 F8h    12h    00h      ???        PS/2 Model 95 XP
 F8h    13h    00h    10/01/90    PS/2 Model 90 XP (33 MHz 486)
 F8h    14h    00h    10/01/90    PS/2 Model 90-AK9 (25 MHz 486), 95 XP
 F8h    15h    00h      ???        PS/2 Model 90 XP
 F8h    16h    00h    10/01/90    PS/2 Model 90-AKD / 95XP486 (33MHz 486)
 F8h    17h    00h      ???        PS/2 Model 90 XP
 F8h    19h    05h      ???        PS/2 Model 35/35LS or 40 (20 MHz 386SX)
 F8h    19h    05h    03/15/91    PS/2 Model 35 SX / 40 SX (LW-type 37)
 F8h    19h    06h    04/04/91    PS/2 Model 35 SX / 40 SX (LW-type 37)
 F8h    1Ah    00h      ???        PS/2 Model 95 XP
 F8h    1Bh    00h    09/29/89    PS/2 Model 70 486 (25 Mhz 386DX)
 F8h    1Bh    00h    10/02/89    PS/2 Model 70-486 (25 MHz 486)
 F8h    1Ch    00h    02/08/90    PS/2 Model 65-121 / 65 SX (16MHz 386SX)
 F8h    1Eh    00h    02/08/90    PS/2 Model 55LS (16 MHz 386SX)
 F8h    23h    00h      ???        PS/2 Model L40 SX
 F8h    23h    01h      ???        PS/2 Model L40 SX (20 MHz 386SX)
 F8h    23h    02h    02/27/91    PS/2 Model L40 SX (20Mhz386SX,LW-typ37)
 F8h    25h    00h      ???        PS/2 Model 57 SLC
 F8h    25h    06h      ???        PS/2 Model M57 (20 MHz 386SLC)
 F8h    26h    00h      ???        PS/2 Model 57 SX
 F8h    26h    01h      ???        PS/2 Model 57 (20 MHz 386SX)
 F8h    26h    02h    07/03/91    PS/2 Model 57 SX (20Mhz 386SX, SCSI)
 F8h    28h    00h      ???        PS/2 Model 95 XP
 F8h    29h    00h      ???        PS/2 Model 90 XP
 F8h    2Ah    00h      ???        PS/2 Model 95 XP (50 MHz 486)
 F8h    2Bh    00h      ???        PS/2 Model 90 / 90XP486 (50 MHz 486)
 F8h    2Ch    00h      ???        PS/2 Model 95 XP
 F8h    2Ch    01h      ???        PS/2 Model 95 (20 MHz 486SX)
 F8h    2Dh    00h      ???        PS/2 Model 90 XP (20 MHz 486SX)
 F8h    2Eh    00h      ???        PS/2 Model 95 XP
 F8h    2Eh    00h      ???        PS/2 Model 95 XP486 (20 Mhz 486SX)
 F8h    2Eh    01h      ???        PS/2 Model 95 (20 MHz 486SX + 487SX)
 F8h    2Fh    00h      ???        PS/2 Model 90 XP (20 MHz 486SX + 487SX)
 F8h    30h    00h      ???        PS/1 Model 2121 (16 MHz 386SX)
 F8h    33h    00h      ???        PS/2 Model 30-386
 F8h    34h    00h      ???        PS/2 Model 25-386
 F8h    36h    00h      ???        PS/2 Model 95 XP
 F8h    37h    00h      ???        PS/2 Model 90 XP
 F8h    38h    00h      ???        PS/2 Model 57
 F8h    39h    00h      ???        PS/2 Model 95 XP
 F8h    3Fh    00h      ???        PS/2 Model 90 XP
 F8h    40h    00h      ???        PS/2 Model 95 XP
 F8h    41h    00h      ???        PS/2 Model 77
 F8h    45h    00h      ???        PS/2 Model 90 XP (Pentium)
 F8h    46h    00h      ???        PS/2 Model 95 XP (Pentium)
 F8h    47h    00h      ???        PS/2 Model 90/95 E (Pentium)
 F8h    48h    00h      ???        PS/2 Model 85
 F8h    49h    00h      ???        PS/ValuePoint 325T
 F8h    4Ah    00h      ???        PS/ValuePoint 425SX
 F8h    4Bh    00h      ???        PS/ValuePoint 433DX
 F8h    4Eh    00h      ???        PS/2 Model 295
 F8h    50h    00h      ???        PS/2 Model P70 (8573) (16 MHz 386)
 F8h    50h    01h    12/16/89    PS/2 Model P70 (8570-031)
 F8h    52h    00h      ???        PS/2 Model P75 (33 MHz 486)
 F8h    56h    00h      ???        PS/2 Model CL57 SX
 F8h    57h    00h      ???        PS/2 Model 90 XP
 F8h    58h    00h      ???        PS/2 Model 95 XP
 F8h    59h    00h      ???        PS/2 Model 90 XP
 F8h    5Ah    00h      ???        PS/2 Model 95 XP
 F8h    5Bh    00h      ???        PS/2 Model 90 XP
 F8h    5Ch    00h      ???        PS/2 Model 95 XP
 F8h    5Dh    00h      ???        PS/2 Model N51 SLC
 F8h    5Eh    00h      ???        IBM ThinkPad 700
 F8h    61h    ***      ???        Olivetti P500
 F8h    62h    ***      ???        Olivetti P800
 F8h    80h    00h      ???        PS/2 Model 80 (25 MHz 386)
 F8h    80h    01h    11/21/89    PS/2 Model 80-A21 (25 Mhz 386)
 F8h    81h    00h      ???        PS/2 Model 55-5502
 F8h    87h    00h      ???        PS/2 Model N33SX
 F8h    88h    00h      ???        PS/2 Model 55-5530T
 F8h    97h    00h      ???        PS/2 Model 55 Note N23SX
 F8h    99h    00h      ???        PS/2 Model N51 SX
 F8h    F2h    30h      ???        Reply Model 32
 F8h    F6h    30h      ???        Memorex Telex
 F8h    FDh    00h      ???        IBM Processor Complex (with VPD)
 F8h    ???    ???      ???        PS/2 Model 90 (25 MHz 486SX)
 F8h    ???    ???      ???        PS/2 Model 95 (25 MHz 486SX)
 F8h    ???    ???      ???        PS/2 Model 90 (25 MHz 486SX + 487SX)
 F8h    ???    ???      ???        PS/2 Model 95 (25 MHz 486SX + 487SX)
 E4h    ???    ???      ???        Triumph Adler PC/XT
 E1h    ???    ???      ???        ??? (checked for by DOS4GW.EXE)
 E1h    00h    00h      ???        PS/2 Model 55-5530 Laptop
 D9h    ???    ???      ???        Peacock XT
 9Ah    *    *      ???        Compaq XT/Compaq Plus
 30h    ???    ???      ???        Sperry PC
 2Dh    *    *      ???        Compaq PC/Compaq Deskpro
 ???    56h    ???      ???        Olivetti, unknown model
 ???    74h    ???      ???        Olivetti, unknown model
Notes:    BIOS dates may vary without changes to the revision code, especially
      for non-IBM machines
    * This BIOS call is not implemented in these early versions or under
      Linux's DOSEMU.  Read the Model byte at F000h:FFFEh and BIOS date at
      F000h:FFF5h instead.
   ** These BIOS versions require the DASDDRVR.SYS patches.
  *** These Olivetti and Epson machines store the submodel in the byte at
    F000h:FFFDh.
SeeAlso: #0411,#0417

(Table 0417)
Values for Dell model byte:
 02h    Dell 200
 03h    Dell 300
 05h    Dell 220
 06h    Dell 310
 07h    Dell 325
 09h    Dell 310A
 0Ah    Dell 316
 0Bh    Dell 220E
 0Ch    Dell 210
 0Dh    Dell 316SX
 0Eh    Dell 316LT
 0Fh    Dell 320LX
 11h    Dell 425E
SeeAlso: #0411,#0416

Format of Compaq product information:
Address        Size    Description    (Table 0418)
 F000h:FFE4h    BYTE    product family code (first byte)
 F000h:FFE4h    BYTE    Point release number
 F000h:FFE4h    BYTE    ROM version code
 F000h:FFE4h    BYTE    product family code (second byte)
 F000h:FFE8h    WORD    BIOS type code
SeeAlso: #0419,#0421

Format of Hewlett-Packard ROM ID at F000h:00F8h:
Offset    Size    Description    (Table 0419)
 00h  2 BYTEs    signature "HP" (48h 50h)
 02h  2 BYTEs    00h 00h
 04h    BYTE    secondary code revision
 05h    BYTE    primary code revision
 06h    BYTE    date code, year-1960 (BCD)
 07h    BYTE    date code, week of year (BCD)
SeeAlso: #0418,#0420

Bitfields for Hewlett-Packard product identifier:
Bit(s)    Description    (Table 0420)
 4-0    machine code
    0 original Vectra
    1 ES/12
    2 RS/20
    3 Portable/CS
    4 ES
    5 CS
    6 RS/16
    other reserved
 7-5    CPU type
    0 = 80286
    1 = 8088
    2 = 8086
    3 = 80386
    other reserved
SeeAlso: #0419

Format of Toshiba laptop information:
Offset    Size    Description    (Table 0421)
 00h  8 BYTEs    ASCII product number (e.g. "T2200SX ")
 08h  8 BYTEs    ASCII version number (e.g. "V1.20   ")
 10h  8 BYTEs    ASCII signature string "TOSHIBA "
 18h  8 BYTEs    always zero???
 20h    DWORD    -> built-in BIOS setup program entry point or 0000h:0000h
Note:    this record is located at F000h:E000h
SeeAlso: #0418,#0419

(Table 0422)
Values for Toshiba product ID:
model prodID   version      date       product number
 FEh    29h        ../..)..   Toshiba T1000LE
 FEh    2Ah        ../..*..   Toshiba T1000XE
 FEh    2Bh        ../..+..   Toshiba T1000SE
 FEh    2Ch        ../..,..   Toshiba T1000
 FEh    2Dh        ../..-..   Toshiba T1200F
 FEh    2Dh    V4.00    12/26-87   Toshiba T1200H
 FEh    2Eh        ../.....   Toshiba T1100+
 FCh    22h        ../.."..   Toshiba T8500
 FCh    26h        01/15&88   Toshiba T5200
 FCh    27h        ../..'..   Toshiba T5100
 FCh    28h        ../..(..   Toshiba T2000
 FCh    2Ah        12/26*89   Toshiba T1200XE
 FCh    2Bh        ../..+..   Toshiba T1600
 FCh    2Ch        ../..,..   Toshiba T3100e
 FCh    2Dh        ../..-..   Toshiba T3200
 FCh    2Fh        ../../..   Toshiba T3100
 FCh    34h    V1.50    02/04494   Toshiba T100X
 FCh    38h        ../..8..   Toshiba T2000SXe
 FCh    39h    V1.20    09/16991   Toshiba T2200SX
 FCh    39h    V1.40    10/01992   Toshiba T2200SX
 FCh    3Ch    V1.50    01/28<91   Toshiba T2000SX
 FCh    3Dh        ../..=..   Toshiba T3200SXC
 FCh    3Eh        ../..>..   Toshiba T3100SX
 FCh    3Fh        ../..?..   Toshiba T3200SX
 FCh    40h        ../..@..   Toshiba T4500C
 FCh    41h    V1.20    04/05A92   Toshiba T4500     ("T4500SXC" ???)
 FCh    45h    V3.20    04/14E92   Toshiba T4400SX   ("C" or "SXC" on cover)
 FCh    45h        01/13E93   Toshiba T4400SXC
 FCh    46h *        ../..F..   Toshiba T6400
 FCh    46h *        ../..F..   Toshiba T6400C
 FCh    5Fh    V1.40    01/18_94   Toshiba T3300SL
 FCh    69h        ../..i..   Toshiba T1900C    ("T1900CT" ???)
 FCh    6Ah    V1.30    05/19j93   Toshiba T1900     ("T1900S" ???)
 FCh    6Dh    V1.10    12/25m92   Toshiba T1850C
 FCh    6Eh    V1.00    08/19n92   Toshiba T1850
 FCh    6Eh    V1.10    12/25n92   Toshiba T1850
 FCh    6Fh    V1.00    07/17o92   Toshiba T1800
 FCh    6Fh    V1.10    12/25o92   Toshiba T1800
 FCh    7Eh    V1.30    06/17~93   Toshiba T4600C
 FCh    7Fh    V1.40    11/10x94   Toshiba T4600
 FCh    8Ah    V1.30    10/22x93   Toshiba T6600C
 FCh    91h    V1.20    07/15x94   Toshiba T2400CT
 FCh    91h    V5.00    07/28x95   Toshiba T2400CS/CT
 FCh    92h    V5.00    07/28x95   Toshiba T3600CT
 FCh    96h *    V1.40    12/08x94   Toshiba T200
 FCh    96h *    V1.50    12/08x94   Toshiba T200CS    (T200)
 FCh    97h        ../..x..   Toshiba T4800CT
 FCh    98h *    V1.10    12/22x93   Toshiba T1910
 FCh    98h *    V2.40    07/12x94   Toshiba T1910/CS    (T19XX)
 FCh    99h        ../..x..   Toshiba T4700CS
 FCh    9Bh    V2.30    01/31x94   Toshiba T4700CT
 FCh    9Bh    V2.50    03/22x94   Toshiba T4700CT
 FCh    9Bh    V5.00    07/28x95   Toshiba T4700CT
 FCh    9Ch    V1.30    01/11x94   Toshiba T1950CT
 FCh    9Ch    V2.50    07/22x94   Toshiba T1950CT    (T19XX)
 FCh    9Dh *    V2.40    07/12x94   Toshiba T1950/CS    (T19XX)
 FCh    9Eh *    V1.20    12/25x93   Toshiba T3400
 FCh    9Eh *    V1.30    03/22x94   Toshiba T3400/CT
 FCh    B5h **    V5.10    08/25x95   Toshiba T2110/CS    (T21XX)
 FCh    B5h    V5.10    08/25x95   Toshiba T2130CS/CT    (T21XX)
 FCh    BAh    V1.30    02/16x95   Toshiba T2150CDS/CDT
 FCh    BAh    V5.00    07/27x95   Toshiba T2150CDS/CDT (T2150)
 FCh    BBh **    V1.30    01/25x95   Toshiba T2100/CS/CT
 FCh    BBh **    V5.00    07/27x95   Toshiba T2100/CS/CT
 FCh    BCh    V1.20    12/05x94   Toshiba T2450CT
 FCh    BCh    V5.00    07/28x95   Toshiba T2450CT
 FCh    BEh    V5.00    07/28x95   Toshiba T4850CT
 FCh    C0h    V5.20    05/30x96   Toshiba 420CDS/CDT
 FCh    C1h    V5.20    03/27x96   Toshiba 100CS
 FCh    C3h    V5.60    07/19x96   Toshiba 710CDT / 720CDT
 FCh    C6h    V5.30    11/30x95   Toshiba 410CS/CDT
 FCh    CAh    V5.10    08/18x95   Toshiba 400CS/CDT
 FCh    CAh    V5.40    12/18x95   Toshiba 400CS/CDT
 FCh    CBh    V5.10    09/01x95   Toshiba 610CT
 FCh    CCh    V5.50    06/13x96   Toshiba 700CS/CT
 FCh    CFh    V5.00    08/07x95   Toshiba T4900CT
 FCh    DCh    V5.10    06/17x96   Toshiba 650CT
 FCh    DCh    V5.10    05/10x96   Toshiba 110CS/CT
 FCh    DDh    V5.10    05/10x96   Toshiba 110CS/CT
 FCh    DFh    V5.20    05/27x96   Toshiba 500CS/CDT
 FCh    ???    V5.???    ../..x..   Toshiba 620CT
 FCh    ???    V5.???    ../..x..   Toshiba 660CDT
 FCh    ???    V5.30    11/22/96   Toshiba 730CDT
 FCh    ???    V6.00    09/20/96   Toshiba 200CDS/CDT
 FCh    ???    V6.20    11/14/96   Toshiba 430CDS/CDT
 FCh    ???    V6.40    12/05/96   Toshiba 510CS/CDT
Notes:    the 8-bit ASCII graphics character in the "date" column above
      has been substituted by "x" if larger than 80h
    BIOS version numbers and dates may vary, esp. due to harddisk and
      (flash) BIOS upgrades; all BIOS versions 5.xx are flash updates
      for Windows 95, the product number may indicate the series only
      (T21XX) or does no longer contain the exact type suffix (CS/CT)
    the most recent versions of the BIOS have stopped including the
      product ID code in the BIOS date
    [*] These models have monochrome and color versions which can be
      distinguished with INT 42/AX=7503h (WD90C24 chipset)
    [**] These models have monochrome and color versions which can be
      distinguished with INT 10/AX=5F50h (CT655xx chipset)
    models not found here like T21x5 are variants differing only in
      bundled software
SeeAlso: #0416
--------B-15C1-------------------------------
INT 15 - SYSTEM - RETURN EXTENDED-BIOS DATA-AREA SEGMENT ADDRESS (PS)
    AH = C1h
Return: CF set on error
    CF clear if successful
        ES = segment of data area
SeeAlso: AH=04h"ABIOS"
--------M-15C200-----------------------------
INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - ENABLE/DISABLE
    AX = C200h
    BH = new state
        00h disabled
        01h enabled
Return: CF set on error
    AH = status (see #0423)

(Table 0423)
Values for pointing device function status:
 00h    successful
 01h    invalid function
 02h    invalid input
 03h    interface error
 04h    need to resend
 05h    no device handler installed
--------M-15C201-----------------------------
INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - RESET
    AX = C201h
Return: CF set on error
        AH = status (see #0423)
    CF clear if successful
        BH = device ID
        BL = value returned by attached device after reset
        AAh if device is a mouse
Note:    after successful completion of this call, the pointing device is set
      as follows: disabled, sample rate 100 Hz, resolution 4 counts/mm,
      scaling 1:1, unchanged data package size
SeeAlso: INT 33/AX=0000h
--------M-15C202-----------------------------
INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - SET SAMPLING RATE
    AX = C202h
    BH = sampling rate
        00h 10/second
        01h 20/second
        02h 40/second
        03h 60/second
        04h 80/second
        05h 100/second
        06h 200/second
Return: CF set on error
        AH = status (see #0423)
SeeAlso: INT 33/AX=001Ch
--------M-15C203-----------------------------
INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - SET RESOLUTION
    AX = C203h
    BH = resolution (see #0424)
Return: CF set on error
        AH = status (see #0423)

(Table 0424)
Values for pointing device resolution:
 00h    one count per mm
 01h    two counts per mm
 02h    four counts per mm
 03h    eight counts per mm
--------M-15C204-----------------------------
INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - GET TYPE
    AX = C204h
Return: CF set on error
        AH = status (see #0423)
    CF clear if successful
        BH = device ID
--------M-15C205-----------------------------
INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - INITIALIZE
    AX = C205h
    BH = data package size (1 - 8 bytes)
Return: CF set on error
        AH = status (see #0423)
Note:    the pointing device is set as follows: disabled, 100 Hz sample rate,
      resolution 4 counts/mm, scaling 1:1
SeeAlso: AX=C201h
--------M-15C206-----------------------------
INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - EXTENDED COMMANDS
    AX = C206h
    BH = subfunction
        00h return device status
        Return: BL = pointing device status (see #0425)
            CL = resolution (see #0424)
            DL = sample rate, reports per second
        01h set scaling at 1:1
        02h set scaling at 2:1
Return: CF set on error
        AH = status (see #0423)

Bitfields for pointing device status:
Bit(s)    Description    (Table 0425)
 0    right button pressed
 1    reserved
 2    left button pressed
 3    reserved
 4    0 if 1:1 scaling, 1 if 2:1 scaling
 5    device enabled
 6    0 if stream mode, 1 if remote mode
 7    reserved
--------M-15C207-----------------------------
INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - SET DEVICE HANDLER ADDR
    AX = C207h
    ES:BX -> FAR user device handler or 0000h:0000h to cancel
Return: CF set on error
        AH = status (see #0423)
Note:    when the subroutine is called, it is passed the following values on
      the stack; the handler should return with a FAR return without
      popping the stack:
        WORD 1: status (see #0426)
        WORD 2: X data (high byte = 00h)
        WORD 3: Y data (high byte = 00h)
        WORD 4: 0000h
SeeAlso: INT 33/AX=000Ch

Bitfields for pointing device status:
Bit(s)    Description    (Table 0426)
 15-8    reserved (0)
 7    Y data overflowed
 6    X data overflowed
 5    Y data is negative
 4    X data is negative
 3    reserved (1)
 2    reserved (0)
 1    right button pressed
 0    left button pressed
--------B-15C3------------------------------
INT 15 - SYSTEM - ENABLE/DISABLE WATCHDOG TIMEOUT (PS50+)
    AH = C3h
    AL = function
        00h disable PS/2 watchdog timer
        01h enable PS/2 watchdog timer
        BX = timer counter (0001h-00FFh)
        02h disable Gearbox system
        03h enable Gearbox system
Return: CF set on error
    CF clear if successful
Note:    the watchdog timer generates an NMI
SeeAlso: INT 21/AH=2Bh/CX=6269h"WDTSR"
--------B-15C4-------------------------------
INT 15 - SYSTEM - PROGRAMMABLE OPTION SELECT (PS50+)
    AH = C4h
    AL = subfunction
        00h return base POS register address
        01h enable selected slot for setup
        BL = slot number (1 to 8)
        02h disable setup for all slots (enable adapter)
Return: CF set on error
    DX = base POS register address (if subfunction 00h)
SeeAlso: AH=C6h
--------B-15C5-------------------------------
INT 15 UC - OS HOOK - ROM BIOS TRACING CALLOUT (PS30/286,PS50Z,PS95)
    AH = C5h
    AL = interrupt being invoked
        01h INT 19
        02h INT 14
        03h INT 16
        04h INT 40 (floppy INT 13)
        05h INT 17
        06h INT 10
        07h INT 12
        08h INT 11
        09h INT 1A
Return: all registers except AX must be preserved
Notes:    called as the very first action of the indicated ROM BIOS interrupt
      handlers on the PS/2 Models 30/286, 50Z, and 95
    default handler does nothing and returns CF clear for the above
      subfunctions, CF set and AH=86h for all other subfunctions
    value of AX passed to the original interrupt handler is pushed on
      stack immediately prior to call
--------B-15C6-------------------------------
INT 15 U - later PS/2 models - GET POS DATA
    AH = C6h
    ???
Return: ???
Notes:    this function is referenced by name and number in some IBM BIOS manuals
    IBM reports that "there are a number of problems with this call" and
      does not recommend its use.
SeeAlso: AH=C4h
--------B-15C7-------------------------------
INT 15 - SYSTEM - later PS/2s - RETURN MEMORY-MAP INFORMATION
    AH = C7h
    DS:SI -> user supplied memory map table (see #0427)
Note:    call AH=C0h and examine bit 4 of feature byte 2 to check if this
      function is supported
Return: CF set on error, clear if successful
SeeAlso: AH=C0h,AH=C9h,AH=D1h

Format of memory-map table structure:
Offset    Size    Description    (Table 0427)
 00h    WORD    length of table (excluding this word)
 02h    DWORD    local memory between 1M and 16M, in 1K blocks
 06h    DWORD    local memory between 16M and 4G, in 1K blocks
 0Ah    DWORD    system memory between 1M and 16M, in 1K blocks
 0Eh    DWORD    system memory between 16M and 4G, in 1K blocks
 12h    DWORD    cacheable memory between 1M and 16M, in 1K blocks
 16h    DWORD    cacheable memory between 16M and 4G, in 1K blocks
 1Ah    DWORD    1K blocks before start of non-system memory between 1M and 16M
 1Eh    DWORD    1K blocks before start of non-system memory between 16M and 4G
 22h  2 DWORDs    reserved
--------B-15C8-------------------------------
INT 15 - SYSTEM - ENABLE/DISABLE PROCESSOR FUNCTIONS
    AH = C8h
    AL = function
        00h disable cache or (90 and 95) disable cache L1
        01h enable cache or (90 and 95) enable cache L1
        ---models 90 and 95 only---
        02h disable L2 cache
        03h enable L2 cache
        04h disable both caches
        05h enable both caches
        06h return status of both caches
        07h-FFh Reserved
Return: CF set on error
    CF clear if successful
        AH = status (see #0428)
    For subfunction 06h only:
        BH = status of cache L2
        00h enabled
        01h disabled or not installed
        BL = status of cache L1 (same codes as BH)
Notes:     supported by at least PS/2 70, 70/486, 80-A21, 90, 95
    call AH=C0h and examine bit 3 of feature byte 2 to check if this
      function is supported.
    on a 486 system, any external caches must be disabled when the
      on-chip cache (L1) is disabled.
SeeAlso: AH=C0h

(Table 0428)
Values for status:
 00h    operation successful
 01h    function choice (in AL) is invalid
 02h    NVRAM data is invalid
 03h    cache test error
 04h    (90 and 95 only) cannot perform operation requested due to state of
      other cache (also see note above)
 05h    no L2 cache is present
 09h    CPU in protected mode
--------B-15C9-------------------------------
INT 15 - newer PS/2; various BIOSes - GET CPU TYPE AND MASK REVISION
    AH = C9h
    AL = 10h (may be required on some non-PS BIOSes)
Return: CF clear if successful
        AH = 00h
        CH = CPU type (see #0429)
        CL = mask revision (stepping level) (see #0430)
    CF set on error
        AH = status (80h,86h = function not supported)
Notes:    the BIOS must save DX at startup in order to be able to support this
      call; PS/2 Models 56, 57, 90, and 95 are known to support it
    the PS/2 BIOS merely reads CMOS locations 190h (type) and 191h (rev)
SeeAlso: AX=DA92h

(Table 0429)
Values for CPU type:
 03h    80386DX or clone
 04h    80486
 05h    Pentium
 23h    80386SX or clone
 33h    Intel i376
 43h    80386SL or clone
 A3h    IBM 386SLC
 A4h    IBM 486SLC

(Table 0430)
Values for stepping level:
---i376 (type code 33h)---
 05h    A0
 08h    B
---80386/80386DX (type code 03h)---
 03h    Intel B1 to B10, Am386DX/DXL step A
 05h    Intel D0
 08h    Intel D1/D2/E1, Am386DX/DXL step B
---80386SL (type code 43h)---
 05h    A
 1xh    B
---80386SX (type code 23h)---
 04h    Intel A0
 05h    Intel B, Am386SX/SXL step A1
 08h    Intel C/D1, Am386SX/SXL step B
 09h    Intel 386CX/386EX/386SXstatic step A
---80486DX (type code 04h)---
 00h    Intel A0/A1
 01h    Intel B2 to B6
 02h    Intel C0
 03h    Intel C1
 04h    Intel D0
 10h    Intel cA2/cA3, Cx486SLC step A
 11h    Intel cB0/cB1
---486DX2 (type code 04h)---
 02h    Am486DX2 (unknown stepping)
 32h    Intel DX2/Overdrive steps A0 to A2
 33h    Intel DX2/Overdrive step B1
---486SX (type code 04h)---
 20h    Intel A0
 22h    Intel B0
 27h    Intel cA0
 28h    Intel cB0
---486SL (type code 04h)---
 40h    Intel A
---IntelSX2 (type code 04h)---
 5xh    Intel A
---IntelDX4 (type code 04h)---
 8xh    Intel A
---487SX (type code 04h)---
 20h    Intel A0
 21h    Intel B0
---Pentium (type code 05h)---
 0xh    Intel P5 steps Ax (1993)
 1xh    Intel P5 steps Bx (1994)
 2xh    Intel P54C step A
---RapidCAD (type code 03h)---
 40h    A
--------B-15CA-------------------------------
INT 15 U - PS/2 Model 95 - READ/WRITE CMOS MEMORY
    AH = CAh
    AL = function
        00h read CMOS
        Return: CL = value of CMOS location
        01h write CMOS
        CL = new value for CMOS location
    BL = CMOS location (0Eh-3Fh)
Return: CF clear if successful
        AH = 00h
    CF set on error
        AH = error code (see #0431)
Note:    writes do not update the CMOS checksum

(Table 0431)
Values for CMOS read/write error code:
 01h    CMOS lost power or has invalid checksum
 03h    specified location out of range (too high)
 04h    specified location out of range (too low)
 80h    unsupported function (PC)
 86h    unsupported function (XT)
--------B-15CB-------------------------------
INT 15 U - PS/2 Model 95 - RESERVED
    AH = CBh
    ???
Return: ???
--------B-15CC-------------------------------
INT 15 U - PS/2 Model 95 - RESERVED
    AH = CCh
    ???
Return: ???
--------V-15CCCC-----------------------------
INT 15 U - Toshiba laptops - VCHAD.EXE - INSTALLATION CHECK
    AX = CCCCh
Return: AX = ABCDh if installed
Note:    supported by Toshiba VGA change display utility VCHAD.EXE ver 2.90+
      older versions have the string "VCHAD" 2 bytes after the address of
      the INT 15 handler which is hooked by all versions for the SysReq key
SeeAlso: AH=85h
--------B-15CD-------------------------------
INT 15 U - PS/2 Model 95 - RESERVED
    AH = CDh
    ???
Return: ???
--------B-15CE--BL00-------------------------
INT 15 - later PS/2s - ALLOCATE DMA ARBITRATION LEVEL
    AH = CEh
    BL = 00h-0Eh arbitration level to be allocated
         0Fh-FFh reserved
    AL = option byte
        bit 7-1: reserved (0)
        bit 0: 0 = need DMA channel for arbitration level requested
           1 = no channel required for arbitration level
Return: CF set on error
        AH = status (80h,86h = function not supported)
    CF clear on success
        AL = channel number
        00h-07h channel number allocated for the arbiration level
        08h-FEh reserved
        FFh    no channel requested for arbitration level
        AH = status (see #0432)
Notes:     arbitration level 00h has the highest priority, 0Eh the lowest
     to perform a DMA transfer operation, be sure to call this function
       first, and call AH=CFh afterward.  Failure to use this function
       can cause unpredictable results.
SeeAlso: AH=CFh

(Table 0432)
Values for DMA arbitration status:
 00h    success
 01h    arbitration level not available
 02h    channel not available
 03h    invalid arbitration level passed
--------B-15CF-------------------------------
INT 15 - later PS/2s - DEALLOCATE DMA ARBITRATION LEVEL
    AH = CFh
    BL = arbitration level to be deallocated (see AH=CEh)
Return: CF set on error
        AH = status (80h,86h = function not supported)
    CF clear on success
        AH = status
        00h success
        04h arbitration level not allocated
SeeAlso: AH=CEh
--------B-15D0-------------------------------
INT 15 - later PS/2s - RESERVED
    AH = D0h
    ???
Return: ???
----------15D042BL00-------------------------
INT 15 R - Intel Pentium Pro BIOS UPDATE - INSTALLATION CHECK
    AX = D042h
    BL = 00h
Return: CF clear if successful
    CF set on error
    AH = status
        00h successful
        EBX:ECX = signature "INTELPEP"
        EDX = BIOS update loader version
        SI = number of 2K update blocks which can be recorded in NVRAM
        86h not implemented
    AL = OEM error (if AH is not 00h or 86h, otherwise undefined)
        00h successful
Program: the Pentium Pro BIOS update allows the system BIOS or other software
      to install a microcode patch into the Pentium Pro processor
Notes:    this API must be called from actual real mode, not V86 mode
    at least 32K stack space must be available when this function is called
SeeAlso: AX=D042h/BL=01h,AX=D042h/BL=02h,AX=D042h/BL=03h
SeeAlso: @xxxxh:xxxxh"Intel BIOS Upgrade",MSR 00000079h
----------15D042BL01-------------------------
INT 15 R - Intel Pentium Pro BIOS UPDATE - WRITE BIOS UPDATE AREA
    AX = D042h
    BL = 01h
    ES:DI -> microcode update block (see #0434)
    CX,DX,SI = segments of three 64K scratchpad areas for BIOS use
Return: CF clear if successful
    CF set on error
    AH = status (see #0433)
    AL = OEM error (if AH is not 00h or 86h, otherwise undefined)
        00h successful
Notes:    a microcode update may also be initiated by a WRMSR instruction
      with ECX=0079h, EDX=00000000h, and EAX=linear address of update
      block (see #0434)
    at least 32K stack space must be available when this function is called
SeeAlso: AX=D042h/BL=00h,AX=D042h/BL=02h,AX=D042h/BL=03h,MSR 00000079h

(Table 0433)
Values for Pentium Pro BIOS update status:
 00h    successful
 86h    not implemented
 90h    unable to erase NVRAM device
 91h    unable to write to NVRAM device
 92h    unable to read storage
 93h    NVRAM is full
 94h    specified processor stepping is not present in system
 95h    invalid header or loader version
 96h    wrong checksum in header
 97h    processor rejected the update
 98h    the same or a more recent update is already stored
 99h    update block number was out of range

Format of Pentium Pro microcode update block:
Offset    Size    Description    (Table 0434)
 00h    DWORD    update header version number (currently 00000001h)
        FFFFFFFFh = unused block
 04h    DWORD    revision number of this microcode update
 08h    DWORD    update creation date, as BCD mmddyyyy (month,day,year)
 0Ch    DWORD    family/model/stepping of processor to which update applied
        (same value as returned by CPUID instruction)
 10h    DWORD    checksum (used to force sum of all 512 DWORDs of the update
        block to 00000000h)
 14h    DWORD    revision number of loader needed to install update
        (currently 00000001h)
 18h 24 BYTEs    reserved for future expansion
 30h 2000 BYTEs    encrypted microcode data
----------15D042BL02-------------------------
INT 15 R - Intel Pentium Pro BIOS UPDATE - BIOS UPDATE CONTROL
    AX = D042h
    BL = 02h
    BH = function
        01h enable update loading at initialization time
        02h check whether update loading is enabled
    CX,DX,SI = segments of three 64K scratchpad areas for BIOS use
Return: CF clear if successful
    CF set on error
    AH = status (see #0433)
        00h successful
        BL = enabled/disabled flag
        86h not implemented
    AL = OEM error (if AH is not 00h or 86h, otherwise undefined)
        00h successful
Notes:    this API must be called from actual real mode, not V86 mode
    at least 32K stack space must be available when this function is called
    there is no call to disable update loading due to security risks; the
      BIOS setup can disable loading
SeeAlso: AX=D042h/BL=00h,AX=D042h/BL=02h,AX=D042h/BL=03h
----------15D042BL03-------------------------
INT 15 R - Intel Pentium Pro BIOS UPDATE - READ BIOS UPDATE AREA
    AX = D042h
    BL = 03h
    ES:DI -> buffer for microcode update block (see #0434)
    ECX = two real-mode 64K scratchpad segments (upper and lower words)
    DX = segment of 64K scratchpad area for BIOS use
    SI = zero-based index number of update block to retrieve
Return: CF clear if successful
    CF set on error
    AH = status
        00h successful
        ES:DI buffer filled with 2048-byte update block
        86h not implemented
    AL = OEM error (if AH is not 00h or 86h, otherwise undefined)
        00h successful
Program: the Pentium Pro BIOS update allows the system BIOS or other software
      to install a microcode patch into the Pentium Pro processor
Notes:    this API must be called from actual real mode, not V86 mode
    at least 32K stack space must be available when this function is called
SeeAlso: AX=D042h/BL=00h,AX=D042h/BL=01h,AX=D042h/BL=03h
--------B-15D100DX0000-----------------------
INT 15 - later PS/2s - GET NUMBER OF DEVICE DESCRIPTOR TABLE (DDT) ENTRIES
    AX = D100h
    DX = 0000h (reserved, must set to 0)
Return: BL = size of one DDT entry, in bytes
    CX = number of DDT entries
    AH = return code (see #0435)
    CF set on error
    CF clear on success
SeeAlso: AH=C0h,AH=C7h,AH=C9h,AX=D101h,AX=D102h,AX=D103h,AX=D104h

(Table 0435)
Values for return code:
 00h    success
 01h    requested DDT entry not found
 02h    DDT data not valid
 86h    function not supported
--------B-15D101-----------------------------
INT 15 - later PS/2s - RETURN DEVICE DESCRIPTOR TABLE (DDT) ENTRY BY NUMBER
    AX = D101h
    BX = number of requested entry (starting with 1)
    DX = 0000h (reserved, must be set to 0)
    ES:DI -> buffer to contain DDT entry (see #0436)
Return: AH = return code (see #0435)
    CF set on error
    CF clear on success
        ES:DI buffer filled with DDT entry
SeeAlso: AH=C0h,AH=C7h,AH=C9h,AX=D100h,AX=D102h,AX=D104h

Format of Device Descriptor Table (DDT):
Offset    Size    Description    (Table 0436)
 00h    BYTE    bits 7-4: reserved (set to 0)
        bits 3-0: slot of device (0 = system board)
 01h    BYTE    bits 7-4: second interrupt for this device (0 = none)
        bits 3-0: first interrupt for this device (0 = none)
 02h    BYTE    bits 7-4: second arbitration level for this device
        bits 3-0: first arbitration level for this device
 03h    WORD    DDT indicators (see #0437)
 05h    BYTE    reserved (0)
 06h    WORD    device ID (0 = none)
 08h    WORD    starting address of first  I/O block (0 = none)
 0Ah    WORD    starting address of second I/O block (0 = none)
 OCh    WORD    starting address of third  I/O block (0 = none)
 OEh    DWORD    start of first non-system memory block (0 = none)
 12h    WORD    size of first non-system memory block (in kilobytes)
 14h    DWORD    start of second non-system memory block (0 = none)
 18h    WORD    size of second non-system memory block (in kilobytes)
 1Ah    BYTE    implementation identifier of the device
 1Bh    BYTE    implementation revision level of the device
Note:    I/O block addresses and non-system memory addresses are listed in
      ascending order in each DDT entry.

Bitfields for DDT indicators:
Bit(s)    Description    (Table 0437)
 15    reserved (0)
 14    second arbitration level exists
 13    first arbitration level exists
 12    serial interface is RS-422
 11    not address limited
 10    DMA channel used
 9    second arbitration level can be shared
 8    first arbitration level can be shared
 7-0    reserved (0)
--------B-15D102-----------------------------
INT 15 - later PS/2s - RETURN DEVICE DESCRIPTOR TABLE (DDT) ENTRY BY I/O ADDRSS
    AX = D102h
    BX = entry number at which to start searching
    CX = requested I/O port address
    DX = 0000h (reserved, must be set to 0)
    ES:DI -> buffer to contain DDT entry (see #0436)
Return: AH = return code (see #0435)
    BX = DDT entry number where I/O port was found, or total entries
         plus 1 if port was not found.
    CF set on error
    CF clear on success
        ES:DI buffer filled with DDT entry
Desc:    the DDT is searched from the specified entry for the I/O port in CX,
      and the first entry in which it is found is returned
SeeAlso: AH=C0h,AH=C7h,AH=C9h,AX=D100h,AX=D101h,AX=D103h,AX=D104h
--------B-15D103DX0000-----------------------
INT 15 - later PS/2s - RETURN ENTIRE DDT
    AX = D103h
    DX = 0000h (reserved, must be set to 0)
    ES:DI -> buffer to contain DDT entry (see #0436)
Return: AH = return code (see #0435)
    CF set on error
    CF clear on success
        ES:DI buffer filled with DDT entry
SeeAlso: AH=C0h,AH=C7h,AH=C9h,AX=D100h,AX=D104h
--------B-15D104-----------------------------
INT 15 - later PS/2s - RETURN DEVICE DESCRIPTOR TABLE (DDT) ENTRY BY DEVICE ID
    AX = D104h
    BX = entry number at which to start searching
    CX = requested device ID
    DX = 0000h (reserved, must be set to 0)
    ES:DI -> buffer to contain DDT entry (see #0436)
Return: AH = return code (see #0435)
    BX = DDT entry number where device ID was found, or total entries
          plus 1 if port was not found.
    CF set on error
    CF clear on success
        ES:DI buffer filled with DDT entry
Desc:    the DDT is searched from the specified entry for the device ID in CX,
      and the first entry in which it is found is returned.
SeeAlso: AH=C0h,AH=C7h,AH=C9h,AX=D100h,AX=D101h,AX=D103h
--------B-15D2-------------------------------
INT 15 - later PS/2s - RESERVED
    AH = D2h
    ???
Return: ???
--------B-15D3-------------------------------
INT 15 - later PS/2s - RESERVED
    AH = D3h
    ???
Return: ???
--------B-15D4-------------------------------
INT 15 - later PS/2s - GET PHYSICAL FIXED DISK DRIVE NUMBER (SELECTABLE BOOT)
    AH = D4h
    DL = logical fixed disk drive number
Return: AH = return code (see #0438)
    CF set on error
    CF clear on success
        AL = physical fixed disk drive number

(Table 0438)
Values for return code:
 00h    success
 01h    specified logical drive number is invalid
 80h    function not supported (on PCjr and PC)
 86h    function not supported
--------B-15D5-------------------------------
INT 15 - later PS/2s - RESERVED
    AH = D5h
    ???
Return: ???
--------B-15D600BL00-------------------------
INT 15 - later PS/2s - READ BOOT DEVICE ID
    AX = D600h
    BL = 00h
    DX = device ID
Return: CF clear if successful
        AH = 00h
    CF set on error
        AH = status (86h for function not supported)
SeeAlso: AX=D600h/BL=01h,AX=D601h/BL=00h,AX=D602h
--------B-15D600BL01-------------------------
INT 15 - later PS/2s - WRITE BOOT DEVICE ID
    AX = D600h
    BL = 01h
    DX = device ID
Return: CF clear on success
        AH = 00h
    CF set on error
        AH = status (86h for function not supported)
SeeAlso: AX=D600h/BL=00h,AX=D601h/BL=01h
--------B-15D601BL00-------------------------
INT 15 - later PS/2s - READ BOOT DEVICE KEY
    AX = D601h
    BL = 00h
    DX = device ID
Return: CF clear on success
        AH = 00h
    CF set on error
        AH = status (86h for function not supported)
SeeAlso: AX=D600h/BL=00h,AX=D601h/BL=01h,AX=D602h
--------B-15D601BL01-------------------------
INT 15 - later PS/2s - WRITE BOOT DEVICE KEY
    AX = D601h
    BL = 01h
    DX = device ID
Return: CF clear on success
        AH = 00h
    CF set on error
        AH = status (86h for function not supported)
SeeAlso: AX=D600h/BL=01h,AX=D601h/BL=00h
--------B-15D602-----------------------------
INT 15 - later PS/2s - QUERY BOOT REFERENCE PARTITION
    AX = D602h
Return: CF clear on success
        AH = 00h
        AL = status of reference-partition boot request
        00h boot not requested
        01h boot requested
    CF set on error
        AH = status (86h for function not supported)
SeeAlso: AX=D601h/BL=00h
--------X-15D800-----------------------------
INT 15 - EISA SYSTEM ROM - READ SLOT CONFIGURATION INFORMATION
    AX = D800h
    CL = slot number (including embedded and virtual)
Return: CF clear if successful
        AH = 00h
    CF set on error
        AH = error code (80h,82h,83h,86h,87h)(see #0440)
    AL = bit flags (see #0439)
    BH = major revision level of configuration utility
    BL = minor revision level of configuration utility
    CX = checksum of configuration file
    DH = number of device functions
    DL = combined function information byte
    SI:DI = 4-byte compressed ID (DI = bytes 0&1, SI = bytes 2&3)
Note:    call with AL=80h if using 32-bit CS addressing mode instead of 16-bit
SeeAlso: AX=D801h,AX=D804h

Bitfields for EISA AL bit flags:
Bit(s)    Description    (Table 0439)
 7    set if duplicate IDs
 6    set if product ID readable
 4,5    slot type (00=expansion, 01=embedded, 10=virtual device)
 0-3    duplicate ID number if bit 7 set

(Table 0440)
Values for EISA error code:
 80h    invalid slot number
 81h    invalid function number
 82h    EISA CMOS corrupt
 83h    empty slot
 84h    error clearing CMOS
 85h    EISA CMOS is full
 86h    invalid BIOS-FW function call
 87h    invalid system configuration
 88h    config utility version not supported
--------X-15D801-----------------------------
INT 15 - EISA SYSTEM ROM - READ FUNCTION CONFIGURATION INFORMATION
    AX = D801h
    CH = function number to read
    CL = slot number (including embedded and virtual)
    DS:SI -> 320-byte buffer for standard configuration data block
Return: CF clear if successful
        AH = 00h
        DS:SI buffer filled
    CF set on error
        AH = error code (80h-83h,86h,87h) (see #0440)
    BX destroyed
Note:    call with AL=81h if using 32-bit CS addressing mode instead of 16-bit
--------X-15D802-----------------------------
INT 15 - EISA SYSTEM ROM - CLEAR NONVOLATILE MEMORY (EISA CMOS)
    AX = D802h
    BH = EISA config utility major revision level
    BL = EISA config utility minor revision level
Return: CF clear if successful
        AH = 00h
    CF set on error
        AH = error code (84h,86h,88h) (see #0440)
Note:    call with AL=82h if using 32-bit CS addressing mode instead of 16-bit
SeeAlso: AX=D803h
--------X-15D803-----------------------------
INT 15 - EISA SYSTEM ROM - WRITE NONVOLATILE MEMORY
    AX = D803h
    CX = length of data structure (0000h = empty slot)
        includes two bytes for config file checksum
    DS:SI -> configuration data
Return: CF clear if successful
        AH = 00h
    CF set on error
        AH = error code (84h-86h) (see #0440)
Note:    call with AL=83h if using 32-bit CS addressing mode instead of 16-bit
SeeAlso: AX=D802h
--------X-15D804-----------------------------
INT 15 - EISA SYSTEM ROM - READ PHYSICAL SLOT
    AX = D804h
    CL = slot number (including embedded and virtual)
Return: CF clear if successful
        AH = 00h
    CF set on error
        AH = error code (80h,83h,86h) (see #0440)
    SI:DI = 4-byte compressed ID (DI = bytes 0&1, SI = bytes 2&3)
Note:    call with AL=84h if using 32-bit CS addressing mode instead of 16-bit
SeeAlso: AX=D800h
--------b-15D820-----------------------------
INT 15 - Compaq LTE Lite - GET ???
    AX = D820h
    DS:SI -> 17-byte buffer for ???
Return: DS:SI buffer filled (first byte is length of remaining data, unless
      it is greater than 10h, in which case the second byte is 00h and no
      other data is returned)
Note:    this function is also supported by Compaq's EISA System ROM, Contura
      486/486c/486cx and recent DESKPRO/i ROMs
SeeAlso: AX=D821h
--------b-15D821-----------------------------
INT 15 - Compaq LTE Lite - SET ???
    AX = D821h
    DS:SI -> counted string (should not be more than 16 bytes)
Return: AH = 00h
Note:    this function is also supported by Compaq's EISA System ROM, Contura
      486/486c/486cx and recent DESKPRO/i ROMs
SeeAlso: AX=D820h
--------b-15D822BL00-------------------------
INT 15 - Compaq EISA System ROM 04/08/93 - GET ???
    AX = D822h
    BL = 00h
    CX = size of buffer or 0000h to retrieve required buffer size
    DS:SI -> buffer for ??? (if CX nonzero)
Return: CF clear if successful
        AH = 00h
        DH = 08h
        CX = required buffer size to retrieve all data (if CX=0 on entry)
        DS:SI buffer filled (if CX nonzero on entry)
    CF set on error (BL nonzero)
        AH = 86h
--------b-15D823-----------------------------
INT 15 - Compaq EISA System ROM 04/08/93 - ???
    AX = D823h
    BL = subfunction??? (00h or 80h)
    BH = ???
    DS:SI -> buffer for ??? (see #0441)
Return: CF clear if successful
        AH = 00h
        DH = 08h
        DL = ???
    CF set on error
        AH = error code
        86h BL neither 00h nor 80h
        87h ???

Format of Compaq EISA buffer:
Offset    Size    Description    (Table 0441)
 00h    BYTE    ???
 01h    WORD    ???
 03h    BYTE    ???
 04h    WORD    ???
 06h    WORD    ???
    ???
----------15D824-----------------------------
INT 15 - Compaq EISA System ROM 04/08/93 - ???
    AX = D824h
    CX = ???
    DS:SI -> ASCIZ string containing ???
Return: CF clear if successful
        AH = 00h
        CX = ???
    CF set on error
        AH = error code
        87h ??? failed
        88h ???
Note:    these functions are only available if ??? from keyboard controller
      command C0h
----------15D825-----------------------------
INT 15 - Compaq EISA System ROM 04/08/93 - ???
    AX = D825h
    CX = ???
    SI = ???
    DI = ???
    ???
Return: CF clear if successful
        AH = 00h
        CX = ???
    CF set on error
        AH = error code
        87h ??? failed
        88h ???
            CX = ???
Note:    these functions are only available if ??? from keyboard controller
      command C0h
----------15D826-----------------------------
INT 15 - Compaq EISA System ROM 04/08/93 - ???
    AX = D826h
    BX = ???
    CX = size of buffer in bytes
    DS:SI -> buffer for ???
    ???
Return: CF clear if successful
        AH = 00h
        CX = ???
    CF set on error
        AH = error code
        87h ??? failed
        88h ???
Note:    these functions are only available if ??? from keyboard controller
      command C0h
--------X-15D8-------------------------------
INT 15 - EISA SYSTEM ROM - 32-bit CS ADDRESSING MODE CALLS
    AH = D8h
    AL = 80h to 84h
    other registers as appropriate for AL=00h to 04h
Return: as appropriate for AL=00h to 04h
Note:    these functions are identical to AX=D800h to D804h, except that they
      should be called when using 32-bit CS addressing mode (pointers use
      ESI rather than SI as offset) instead of 16-bit addressing mode
SeeAlso: AX=D800h,AX=D801h,AX=D802h,AX=D803h,AX=D804h
--------b-15D8-------------------------------
INT 15 - Compaq EISA System ROM 04/08/93 - 32-bit CS ADDRESSING MODE CALLS
    AH = D8h
    AL = A0h to A6h
    other registers as appropriate for AL=20h to 26h
Return: as appropriate for AL=20h to 26h
Note:    these functions are identical to AX=D820h to D826h, except that they
      should be called when using 32-bit CS addressing mode
----------15DA-------------------------------
INT 15 U - AMI PCI BIOS v1.00.05.AX1 - ???
    AH = DAh
    AL = function (00h-08h,12h,14h,15h,19h,88h-8Eh,92h,99h)
    other registers vary by function
Return: CF clear if successful
        varies by function
    CF set on error
        AH = error code (86h unsupported [sub]function)
Note:    functions not listed above always return CF set and AH=86h; in the
      examined BIOS, functions 02h-04h,06h-07h,89h-8Bh, and 8Dh also
      always return CF set and AH=86h
SeeAlso: AX=DA00h,AX=DA01h,AX=DA88h,AX=DA99h,AX=DB00h
--------b-15DA00-----------------------------
INT 15 U - AMI PCI BIOS - ???
    AX = DA00h
    CL = subfunction
        00h ???
        01h ???
        02h get ???
    ???
Return: CF clear if successful
        ???
    CF set on error
        AH = error code (86h unsupported subfunction)
Note:    in the v1.00.05.AX1 BIOS, subfunctions 00h and 01h always return
      failure
SeeAlso: AX=DA01h
--------b-15DA01-----------------------------
INT 15 U - AMI PCI BIOS - CPU SPEED CONTROL
    AX = DA01h
    CL = subfunction (00h-02h)
        00h set low CPU speed
        01h set high CPU speed
        02h get current CPU speed
Return: CF clear if successful
        AH = current/new CPU speed (00h low, 01h high)
        AL = ??? (00h)
    CF set on error
        AH = error code (86h unsupported subfunction)
Notes:    in the v1.00.05.AX1 BIOS, subfunctions 00h and 01h are NOPs in both
      protected and V86 modes due to a test of MSW bit 0
    setting the CPU speed also generates the same audible signals generated
      when manually switching speeds with Ctrl-Alt-Gray- and Ctrl-Alt-Gray+
BUG:    the BIOS apparently intends to return CF set if ???, but fails to use
      a different exit path in that case, resulting in CF clear
----------15DA05-----------------------------
INT 15 U - AMI PCI BIOS - GET ??? AND BIOS REVISION STRINGS
    AX = DA05h
    ES:SI -> 8-byte buffer for ??? and BIOS revision strings
Return: CF clear
    ES:SI buffer filled
    AL = 00h
    CX = ??? (0000h)
Notes:    for BIOS v1.00.05.AX1, the ??? string is "IDNO" and the BIOS revision
      string is "AX1 "
SeeAlso: AX=DA15h,AX=DB04h
----------15DA08-----------------------------
INT 15 U - AMI PCI BIOS - ???
    AX = DA08h
    ???
Return: CF clear if successful
        ???
    CF set on error
        AH = error code (86h unsupported subfunction)
Note:    in the examined v1.00.05.AX1 BIOS, this call always returns failure
----------15DA12-----------------------------
INT 15 U - AMI PCI BIOS - v1.00.05.AX1 - ???
    AX = DA12h
    CL = subfunction
        00h ???
        01h    ???
        02h get ???
        03h ???
        04h ???
    ???
Return: CF clear if successful
        ???
    CF set on error
        AH = error code (86h unsupported subfunction)
Desc:    ??? performs various manipulations on system chipset registers
Notes:    subfunctions 00h and 01h are NOPs in protected and V86 modes due to
      a test of MSW bit 0
    subfunctions 00h-02h always return success
----------15DA14-----------------------------
INT 15 U - AMI PCI BIOS - GET/SET ???
    AX = DA14h
    CL = subfunction
        00h read
        01h write
        DH = new value for ??? (00h-02h)
    DL = index of ??? (00h-03h, but not range-checked)
    ???
Return: CF clear if successful
        DH = current value of ??? if reading
    CF set on error
        AH = error code (86h unsupported subfunction)
Note:    the values for indexes 00h and 01h are stored in CMOS RAM location 19h,
      and the values for 02h and 03h are stored in location 36h
BUG:    the v1.00.05.AX1 BIOS range-checks DH on subfunction 00h instead of
      subfunction 01h, even though DH is never used by subfunction 00h
----------15DA15-----------------------------
INT 15 U - AMI PCI BIOS - GET ??? AND BIOS REVISION STRINGS
    AX = DA15h
    ES:DI -> 8-byte buffer for ??? and BIOS revision strings
Return: CF clear
    ES:DI buffer filled
    AL = 00h
Note:    for BIOS v1.00.05.AX1, the ??? string is "IDNO" and the BIOS revision
      string is "AX1 "
SeeAlso: AX=DA05h,AX=DB04h
----------15DA19-----------------------------
INT 15 U - AMI PCI BIOS - GET/SET ???
    AX = DA19h
    CL = subfunction
        00h get first ???
        01h get second ???
        02h set first ???
        BX = ???
        DX = ???
        03h set second ???
        BX = ???
        DX = ???
Return: CF clear if successful
        AX = 0000h
        BX,DX = ??? (subfunctions 00h and 01h only)
    CF set on error
        AH = error code (86h unsupported subfunction)
Note:    the first ??? is stored in CMOS RAM locations 1Bh-1Eh, the second in
      locations 1Fh-22h in the v1.00.05.AX1 BIOS
--------b-15DA20-----------------------------
INT 15 U - AMI PCI BIOS v1.00.12.AX1T - CMOS RAM BITFIELD MANIPULATION
    AX = DA20h
    BL = subfunction
        00h set CMOS data field
        BH = CMOS data field number (00h-4Dh)
        CH = new value for bitfield (in lowest bits of register)
        01h read CMOS data field
        BH = CMOS data field number (00h-4Dh)
        Return: CH = value of bitfield
            CL = mask of valid bits
        Note:    both CL/CH shifted to move valid bits into lowest pos
        02h set CMOS byte
        CL = CMOS RAM address (00h-7Fh)
        CH = new value for CMOS byte
        03h get CMOS byte
        CL = CMOS RAM address (00h-7Fh)
        Return: CH = value of CMOS byte
        04h update CMOS checksums
        Note:    sets 2Eh/2Fh to checksum of 10h-2Dh and 7Eh/7Fh to
              checksum of 48h-7Dh
        05h verify CMOS checksums
        Return:    CF clear if checksums OK
                AH = 00h
            CF set if checksum mismatch
                AH = 01h
Return: CF clear if successful
        AH = 00h
    CF set on error
        AH = error code (86h unsupported function/data field)
Notes:    this function was not supported by the v1.00.05.AX1 BIOS, but had been
      added by 1.00.12.AX1T
    after using subfunctions 00h or 02h, the application must call
      subfunction 04h to update the checksums to prevent an error the next
      time the system is booted

(Table 0442)
Values for AMI BIOS v1.00.12.AX1T CMOS bitfield identifier:
 ID    address    bit(s)    contents
 00h    1Ah    7-6
 01h    1Dh    7-6
 02h    6Eh    1
 03h    77h    0
 04h    77h    1
 05h    77h    2
 06h    77h    3
 07h    77h    5
 08h    77h    6
 09h    77h    7
 0Ah    78h    7    power management enabled???
 0Bh    78h    6
 0Ch    10h    7-4    first floppy drive type
 0Dh    10h    3-0    second floppy drive type
 0Eh    11h    7
 0Fh    20h    4-0    selected language for error messages/setup utility
 10h    11h    2-1
 11h    11h    4
 12h    11h    0
 13h    11h    3
 14h    13h    7
 15h    13h    6-5
 16h    13h    4-2
 17h    19h    7
 18h    19h    6
 19h    19h    5
 1Ah    19h    4
 1Bh    1Eh    2-0
 1Ch    1Bh    7-6
 1Dh    1Ch    7
 1Eh    1Ch    3
 1Fh    1Ah    5-4
 20h    1Dh    5-4
 21h    1Bh    5-4
 22h    1Ch    6
 23h    1Ch    2
 24h    1Ah    3-2
 25h    1Dh    3-2
 26h    1Bh    3-2
 27h    1Ch    5
 28h    1Ch    1
 29h    1Ah    1-0
 2Ah    1Dh    1-0
 2Bh    1Bh    1-0
 2Ch    1Ch    4
 2Dh    1Ch    0
 2Eh    50h    7-0
 2Fh    51h    7-0
 30h    52h    7-0
 31h    53h    7-0
 32h    60h    0
 33h    60h    0
 34h    60h    0
 35h    60h    0
 36h    60h    0
 37h    60h    0
 38h    60h    1
 39h    61h    7
 3Ah    60h    2
 3Bh    61h    6-4
 3Ch    61h    2-0
 3Dh    60h    7-6
 3Eh    60h    5-4
 3Fh    78h    5-4
 40h    6Eh    5
 41h    1Eh    3
 42h    6Eh    0
 43h    6Eh    2
 44h    6Fh    1-0
 45h    6Fh    1-0
 46h    28h    4-2
 47h    28h    7-5
 48h    6Eh    4
 49h    6Eh    3
 4Ah    76h    7-0
 4Bh    77h    4
 4Ch    11h    6
 4Dh    1Fh    7-0
----------15DA88-----------------------------
INT 15 U - AMI PCI BIOS - GET EXTENDED MEMORY SIZE
    AX = DA88h
Return: CF clear (successful)
    AX = 0000h
    CL:BX = extended memory size in KBytes
SeeAlso: AH=88h
----------15DA8C-----------------------------
INT 15 U - AMI PCI BIOS - GET BIOS AND CHIPSET IDENTIFICATION
    AX = DA8Ch
    CL = subfunction
        00h get BIOS version string
        ES:DI -> 12-byte buffer for version string
        01h get chipset identification
        BL = what to retrieve
            (00h host/PCI bridge,01h motherboard chipset)
        ES:DI -> 12-byte buffer for chipset identification (see #0443)
Return: CF clear if successful
        ES:DI buffer filled
    CF set on error
        AH = error code (86h unsupported subfunction)
Notes:    the v1.00.05.AX1 BIOS returns "1.00.05.AX1 " as its version string
    subfunction 01h returns the five bytes read from the PCI configuration
      registers 00h-05h (see #0628), padded to 12 bytes with NULs
SeeAlso: AX=DB04h,PORT C000h"Neptune"

Format of AMI PCI BIOS chipset identification:
Offset    Size    Description    (Table 0443)
 00h    WORD    vendor ID (see #0629)
        8086h = Intel
 02h    WORD    device ID
        0484h (BL=01h)
        04A3h (BL=00h)
 04h    BYTE    low byte of PCI Command Register
 05h  7 BYTEs    unused (00h)
----------15DA8E-----------------------------
INT 15 U - AMI PCI BIOS - ???
    AX = DA8Eh
    ???
Return: CF clear if successful
        ???
    CF set on error
        AH = error code (86h unsupported subfunction)
Note:    in the    v1.00.05.AX1 BIOS, this call always returns failure
----------15DA92-----------------------------
INT 15 U - AMI PCI BIOS - GET CPU TYPE AND SPEED
    AX = DA92h
Return: CF clear (successful)
    AL = CPU stepping (see also #0430 at INT 15/AH=C9h)
    AH = CPU model
    BL = CPU family (05h = Pentium, etc.)
    CX = external clock speed??? in BCD
        (0040h,0050h,0060h,0066h are possible return values on my
          Pentium with the Intel "Neptune" chipset)
    EAX high word destroyed
Note:    90 MHz and faster Pentium CPUs can be configured to run at 1.5 or
      2.0 times the external clock speed, i.e. a typical 90 MHz Pentium
      system will run the motherboard at 60 MHz (my 90 MHz Pentium returns
      0060h in CX)
SeeAlso: AH=C9h
----------15DA99-----------------------------
INT 15 U - AMI PCI BIOS - GET/SET ??? FLAG
    AX = DA99h
    CL = subfunction
        00h check if ???
        01h set ??? flag
        02h clear ??? flag
Return: CF clear if successful
        AH = ??? (00h,01h)
        AL = 00h
    CF set on error
        AH = error code (86h unsupported subfunction)
Note:    the flag is stored in bit 0 of CMOS RAM location 2Ch for BIOS
      v1.00.05.AX1
--------b-15DB00-----------------------------
INT 15 U - AMI BIOS - Flash ROM - READ FLASH BIOS
    AX = DB00h
    DS:SI -> parameter block (see #0444)
    ES:DI -> buffer for copied information
Return: CF clear if successful
    CF set on error
        AH = status (86h if not implemented)
    DS,ES destroyed, possibly other registers
Note:    used by FMUP.EXE, Intel's Flash Memory Update utility
SeeAlso: AH=DAh,AX=DB01h,AX=DB04h

Format of AMI BIOS Flash ROM parameter block:
Offset    Size    Description    (Table 0444)
 00h 32 BYTEs    ASCIZ description of the file's contents
 20h    BYTE    Logical area type (see #0445)
 21h    DWORD    logical area size (overall size of area)
 25h    BYTE    flag: load from file (FF=yes, 00=no)
 26h    BYTE    flag: reboot after update (FF=yes, 00=no)
 27h    BYTE    flag: update entire image (FF=yes, 00=no)
 28h 24    BYTEs    ASCIZ logical area name (cooresponds to offset 20)
        "System BIOS"
        "Logo Data Area", etc.
 40h 15 BYTEs    ASCIZ time stamp string: MM/DD/YY-HH:MM
 4Fh    BYTE    checksum for this header (sum of all bytes except this one)
        if checksum would be 00h,01h, or FFh, it is set to 2Ah
 50h    DWORD    this file's starting address (offset in image)
 54h    DWORD    size of image chunk in this file
 58h    BYTE    logical area type - same as offset 20h
 59h    BYTE    flag: last file in chain (FF=yes, 00=no)
 5Ah  6 BYTEs    ASCIZ signature "FLASH"
 60h 16 BYTEs    ASCIZ filename of next file in chain
 70h 16 BYTEs    ASCIZ BIOS reserved string (usually version #)
Notes:    this block is identical in format to the 128-byte header on an AMI
      BIOS Update file
    for AX=DB00h, the following fields must be specified: 50h,54h,58h;
      the fields at offset 20h and 5Ah should also be set if possible
    the fields at offsets 40h and 70h will be set on return, if available
SeeAlso: #0446
--------b-15DB01-----------------------------
INT 15 U - AMI BIOS - Flash ROM - GET BIOS SUBSYSTEM INFORMATION
    AX = DB01h
    CL = BIOS subsystem information identifier (see #0445)
Return: CF clear if successful
        AX = 0000h
        ES:DI -> 56-byte record describing subsystem (see #0446)
    CF set on error
        AH = status
        01h nonexistent subsystem
        86h function not supported
        AL = 00h
Note:    used by FMUP.EXE, Intel's Flash Memory Update utility
SeeAlso: AX=DB00h,AX=DB02h

(Table 0445)
Values for AMI BIOS subsystem identifier:
 00h    recovery code
 01h    system BIOS
 02h    PCI configuration data
 03h    OEM logo data area (see #0447)
 04h    system BIOS/Language Set (one system)
    configuration utility (another system)
SeeAlso: #0446

Format of AMI BIOS subsystem information:
Offset    Size    Description    (Table 0446)
 00h    BYTE    subsystem identifier/logical area type (see #0445)
 01h    DWORD    subsystem (FlashROM page) size in bytes
 05h    BYTE    flag: loadable from file (FFh=yes)
 06h    BYTE    flag: reboot after update (FFh=yes)
 07h    BYTE    flag: update entire image (FFh=yes)
 08h 24 BYTEs    subsystem/logical area name
 20h    BYTE    subsystem identifier???
 21h    BYTE    flag: reprogrammable if FFh
 22h    BYTE    ??? (01h,02h seen)
 23h  5 BYTEs    ??? (apparently always 00h)
 28h 16 BYTEs    BIOS reserved string (usually version number)
SeeAlso: #0444

Format of AMI OEM Logo data area:
Offset    Size    Description    (Table 0447)
 00h  8 BYTEs    signature
        "TEXTLOGO" if text-mode OEM logo
        8 DUP (FFh) if unused
 08h    WORD    offset of logo font definition table
 0Ah    WORD    offset of logo data
 0Ch    WORD    size of logo font table in words
 0Eh    WORD    offset of upper left corner of logo in video page
 10h    WORD    width of logo
 12h    WORD    height of logo
 14h    BYTE    reserved???
 var    var    logo font definition (16 bytes per character)
 var    var    logo data as character/attribute pairs
Note:    the attribute for the logo characters specifies which font will be used
      for that character.  If bit 3 is cleared, the normal system font is
      used; if bit 3 is set, the logo font is used, with screen colors
      adjusted to match the corresponding non-bright attribute for the
      system font
SeeAlso: #0445,#0446
--------b-15DB02-----------------------------
INT 15 U - AMI BIOS - Flash ROM - GET SIZE OF FLASH ROM PROGRAMMING CODE
    AX = DB02h
Return: CF clear
    AX = 0000h
    BX = size of ROM programming code in bytes
Note:    used by FMUP.EXE, Intel's Flash Memory Update utility
SeeAlso: AX=DB00h,AX=DB03h
--------b-15DB03-----------------------------
INT 15 U - AMI BIOS - Flash ROM - GET FLASH ROM PROGRAMMING CODE
    AX = DB03h
    DS:SI -> ???
    ES:DI -> buffer for Flash ROM programming code
    BX = ???
    DX = ???
Return: CF clear if successful
        AH = ???
        BX = ???
        DX = ???
    CF set on error
        AH = error code
Notes:    the entry point for the copied code (which is fully relocatable) is
      the very first byte (see #0448)
    used by FMUP.EXE, Intel's Flash Memory Update utility
SeeAlso: AX=DB00h,AX=DB02h

(Table 0448)
Call AMI BIOS ??? code with:
    AL = function
        00h erase Flash ROM block
        CX = ???
            bit 8: address line A16 inverted
        ???
        01h program new data into Flash ROM
        ???
        02h perform cold reboot
    DS:SI -> ??? (see #0449)
    ES:DI -> ???
Return: AH = status
        00h successful
        01h invalid function
        02h ???
        03h ???
        04h ???
Note:    DS:SI and ES:DI are ignored for function 02h

Format of AMI BIOS Flash ROM programming parameters:
Offset    Size    Description    (Table 0449)
 00h 32 BYTEs    ???
 20h    BYTE    BIOS section number
 21h    DWORD    length of BIOS code/data in bytes
 25h 43 BYTEs    ???
 50h    DWORD    ???
 54h 44 BYTEs    ???
SeeAlso: #0448
--------b-15DB04-----------------------------
INT 15 U - AMI BIOS - Flash ROM - GET BIOS REVISION
    AX = DB04h
Return: CF clear if supported
        BL:BH:DL:DH = BIOS revision string
        (e.g. 'AX1 ' for v1.00.05.AX1, 'AV0M' for v1.00.03.AV0M)
        CL = flag: DH valid?
        00h ignore DH; ignore DL as well if 20h (space)
        01h ignore DH if 20h (space)
        CH = BIOS status
        00h normal mode
        01h ROM recovery mode
        AL = ??? (02h)
Note:    used by FMUP.EXE, Intel's Flash Memory Update utility
SeeAlso: AX=DA05h,AX=DA15h,AX=DA8Ch,AX=DB00h,AX=DB03h
--------Q-15DE00-----------------------------
INT 15 - DESQview - GET PROGRAM NAME
    AX = DE00h
Return: AX = offset into DESQVIEW.DVO of program most recently selected from
          the "Switch Windows" menu (see #0450)
Note:    always returns AX=0000h under DESQview/X
SeeAlso: AX=DE07h

Format of program entry in DESQVIEW.DVO:
Offset    Size    Description    (Table 0450)
 00h    BYTE    length of name (FFh if end of file)
 01h  N BYTEs    name
      2 BYTEs    keys to invoke program (second = 00h if only one key used)
    BYTE    program type
        00h normal program
        04h divider
        80h Delete a Program
        81h Change a Program
    WORD    ??? apparently always 0000h
--------Q-15DE01-----------------------------
INT 15 - DESQview - UPDATE "OPEN WINDOW" MENU
    AX = DE01h
Return: nothing
Notes:    reads DESQVIEW.DVO, disables Open menu if file not in current directory
    NOP for DESQview/X
--------Q-15DE02-----------------------------
INT 15 - DESQview 1.x only - SET ??? FLAG FOR CURRENT WINDOW
    AX = DE02h
Return: nothing
Note:    this call is a NOP in DV 2.x
SeeAlso: AX=DE03h
--------Q-15DE03-----------------------------
INT 15 - DESQview 1.x only - GET ??? FOR CURRENT WINDOW
    AX = DE03h
Return: AX = ??? for current window
    BX = ??? for current window
Note:    this call is a NOP in DV 2.x
SeeAlso: AX=DE02h
--------Q-15DE04-----------------------------
INT 15 - DESQview - GET AVAILABLE COMMON MEMORY
    AX = DE04h
Return: BX = bytes of common memory available
    CX = largest block available
    DX = total common memory in bytes
SeeAlso: AX=DE05h,AX=DE06h
--------Q-15DE05-----------------------------
INT 15 - DESQview - GET AVAILABLE CONVENTIONAL MEMORY
    AX = DE05h
Return: BX = KB of memory available
    CX = largest block available
    DX = total conventional memory in KB
SeeAlso: AX=DE04h,AX=DE06h
--------Q-15DE06-----------------------------
INT 15 - DESQview - GET AVAILABLE EXPANDED MEMORY
    AX = DE06h
Return: BX = KB of expanded memory available
    CX = largest block available
    DX = total expanded memory in KB
SeeAlso: AX=DE04h,AX=DE05h
--------Q-15DE07-----------------------------
INT 15 - DESQview - "APPNUM" - GET CURRENT PROGRAM'S NUMBER
    AX = DE07h
Return: AX = number of program as it appears on the "Switch Windows" menu
Note:    this API call may be made from a hardware interrupt handler
SeeAlso: AX=DE00h
--------Q-15DE08-----------------------------
INT 15 - DESQview - GET ???
    AX = DE08h
Return: AX = 0000h if ??? is not set to the current task
         0001h if ??? is set to the current task
--------Q-15DE09-----------------------------
INT 15 - DESQview - UNIMPLEMENTED
    AX = DE09h
Return: nothing (NOP in DV 1.x and 2.x)
--------Q-15DE0A-----------------------------
INT 15 - DESQview v2.00+ - "DBGPOKE" - DISPLAY CHARACTER ON STATUS LINE
    AX = DE0Ah
    BL = character
Return: character displayed, next call will display in next position (which
    wraps back to the start of the line if off the right edge of screen)
Notes:    displays character on bottom line of *physical* screen, regardless
      of current size of window (even entirely hidden)
    does not know about graphics display modes, just pokes the characters
      into display memory
    this API call may be made from a hardware interrupt handler
SeeAlso: AX=1003h
--------Q-15DE0B-----------------------------
INT 15 - DESQview v2.00+ - "APILEVEL" - DEFINE MINIMUM API LEVEL REQUIRED
    AX = DE0Bh
    BL = API level minor version number
    BH = API level major version number
Return: AX = maximum API level (AH = major, AL = minor)
Notes:    if the requested API level is greater than the version of DESQview, a
      "You need a newer version" error window is popped up
    the API level defaults to 1.00, and is inherited by child tasks
--------Q-15DE0C-----------------------------
INT 15 - DESQview v2.00+ - "GETMEM" - ALLOCATE "SYSTEM" MEMORY
    AX = DE0Ch
    BX = number of bytes
Return: ES:DI -> allocated block or 0000h:0000h (DV 2.26+)
Note:    use SETERROR (AX=DE15h) to avoid a user prompt if there is insufficient
      system memory
SeeAlso: AX=1001h,AX=102Eh,AX=DE0Dh,AX=DE15h,AX=DE19h
--------Q-15DE0D-----------------------------
INT 15 - DESQview v2.00+ - "PUTMEM" - DEALLOCATE "SYSTEM" MEMORY
    AX = DE0Dh
    ES:DI -> previously allocated block
Return: nothing
SeeAlso: AX=1002h,AX=DE0Ch
--------Q-15DE0E-----------------------------
INT 15 - DESQview v2.00+ - "FINDMAIL" - FIND MAILBOX BY NAME
    AX = DE0Eh
    ES:DI -> name to find (see #0451)
    CX = length of name
Return: BX = 0000h not found
         0001h found
        DS:SI = object handle
SeeAlso: AH=12h/BH=11h,AH=12h/BH=12h"GETNAME"

(Table 0451)
Values for special DESQview mailbox names:
 "COM1" ... "COM4"    RBcomm using COM1 ... COM4
 "DESQview/X Help Engine"
 "DESQview/X Network Server"  Network Manager
 "DESQview X Server0"    X-Windows server
 "DESQview X Server7"    X-Windows printing service
 "INBOX"        DESQview/X LPD requests
 "OUTBOX"        DESQview/X LPD responses
 "WAITBOX"        semaphore to synchronize DESQview/X LPD communications
 "_DVNM_"        DV/X v1.10 network manager
--------Q-15DE0F-----------------------------
INT 15 - DESQview v2.00+ - ENABLE DESQview EXTENSIONS
    AX = DE0Fh
Return: AX and BX destroyed (seems to be bug, weren't saved&restored)
Notes:    sends a manager stream with opcodes AEh, BDh, and BFh to task's window
    enables an additional mouse mode
--------Q-15DE10-----------------------------
INT 15 - DESQview v2.00+ - "PUSHKEY" - PUT KEY INTO KEYBOARD INPUT STREAM
    AX = DE10h
    BH = scan code
    BL = character
Return: nothing
Notes:    a later read will get the keystroke as if it had been typed by the user
    multiple pushes are read last-in first-out
    if a script exists for the pushed key in the current application, the
      script will be executed
    early copies of DV 2.00 destroy AX, BX, ES, and DI
SeeAlso: INT 16/AH=05h
--------Q-15DE11BL00-------------------------
INT 15 - DESQview v2.00+ - "JUSTIFY" - EN/DISABLE AUTOM. WINDOW JUSTIFICATION
    AX = DE11h
    BL = 00h      viewport will not move automatically
         nonzero  viewport will move to keep cursor visible (default)
Return: nothing
--------Q-15DE12BX0000-----------------------
INT 15 - DESQview v2.01+ - "CSTYLE" - SET "C"-COMPATIBLE CONTROL CHAR INTERPRET
    AX = DE12h
    BX = 0000h    select normal style (linefeed only moves down)
         nonzero  select C style (linefeed moves to start of next line)
Return: nothing
Note:    set on a per-task basis, and inherited from the parent task
--------Q-15DE13-----------------------------
INT 15 - DESQview v2.20+ - "GETCRIT" - GET CRITICAL NESTING COUNT
    AX = DE13h
Return: BX = number of calls to BEGINC or ENTERC
          (see INT 15/AX=101Bh,INT 15/AX=DE1Ch) without matching ENDC
          (see INT 15/AX=101Ch)
Note:    this API call may be made from within a hardware interrupt handler
SeeAlso: AX=101Bh,AX=101Ch,AX=DE1Bh,AX=DE1Ch
--------Q-15DE14-----------------------------
INT 15 - DESQview v2.20+ - GET OBJECT TYPE
    AX = DE14h
    ES:DI -> object
Return: BL = 00h not an object
         08h window or task
         09h mailbox
         0Ah keyboard
         0Bh timer
         0Ch objectq
         0Fh pointer
         10h panel
SeeAlso: AX=1016h
--------Q-15DE15-----------------------------
INT 15 - DESQview v2.20+ - SET ERROR HANDLING
    AX = DE15h
    BL = error handling mode
        00h post system error on all error conditions
        01h return carry flag set on calls to ADDTO, SUBFROM, and WRITE
        messages sent to mailboxes which fail due to lack of system
        or common memory
        02h (v2.26+) same as 01h, but also return null pointer for GETMEM
        calls which fail due to lack of system memory
Return: nothing
SeeAlso: AX=DE0Ch,AX=DE16h
--------Q-15DE16-----------------------------
INT 15 - DESQview v2.20+ - GET ERROR HANDLING
    AX = DE16h
Return: BL = current mode
        00h always post system error
        01h return carry flag set on failed mailbox writes
        02h return CF set on failed mailbox writes and NULL on failed
        GETMEM calls
SeeAlso: AX=DE15h
--------Q-15DE17-----------------------------
INT 15 - DESQview v2.20-2.25 - reserved
    AX = DE17h
Return: pops up "Programming error" window
Note:    AX = 1117h is NOT identical to this call under DESQview 2.20 thru 2.25
SeeAlso: AX=1117h
--------Q-15DE17-----------------------------
INT 15 - DESQview v2.26+ - "ASSERTMAP" - GET/SET MAPPING CONTEXT
    AX = DE17h
    BX = function
        0000h   get current mapping context without setting
        nonzero set new mapping context to BX
Return: BX = mapping context in effect before call
Notes:    mapping contexts determine conventional-memory addressability; setting
      a mapping context ensures that the associated program and data areas
      are in memory for access.  Usable by drivers, TSRs and shared
      programs.
    caller need not be running under DESQview
    this API call may be made from a hardware interrupt handler
SeeAlso: AX=1016h,AX=1117h,AX=DE21h,INT 2F/AX=1685h
--------Q-15DE18-----------------------------
INT 15 - DESQview v2.20+ - internal - ???
    AX = DE18h
    BP = function number
        high byte must be 10h
        low byte is function
        00h set ???
            BL = ???  (00h-10h, video mode???)
            BH = value to store
        03h set ???
            BL = ??? (stored in driver)
        0Ah get ???
            ES:DI -> 18-byte buffer to hold ???
Note:    calls video driver (NOP for Hercules driver,probably CGA and MCGA also)
--------Q-15DE19-----------------------------
INT 15 - DESQview v2.23+ - "GETCOMMON" - ALLOCATE "COMMON" MEMORY
    AX = DE19h
    BX = number of bytes to allocate
Return: AX = 0000h successful
        ES:DI -> allocated block
         nonzero insufficient memory
Note:    this API call may be made from within a hardware interrupt handler
SeeAlso: AX=DE0Ch,AX=DE15h,AX=DE1Ah
--------Q-15DE1A-----------------------------
INT 15 - DESQview v2.23+ - "PUTCOMMON" - DEALLOCATE "COMMON" MEMORY
    AX = DE1Ah
    ES:DI -> previously allocated block
Return: AX = 0000h (successful)
Note:    this function may be called from within a hardware interrupt handler
SeeAlso: AX=DE0Dh,AX=DE19h
--------Q-15DE1B-----------------------------
INT 15 - DESQview v2.23+ internal - DECREMENT CRITICAL NESTING COUNT
    AX = DE1Bh
Return: nothing
SeeAlso: AX=101Ch,AX=DE13h,AX=DE1Ch
--------Q-15DE1C-----------------------------
INT 15 - DESQview v2.23+ - "ENTERC" - INCREMENT CRITICAL NESTING COUNT
    AX = DE1Ch
Return: nothing
Notes:    similar to AX=101Bh, but begins the critical region without ensuring
      that DOS is free
    the official documentation states that this call should be paired with
      "ENDC" (AX=101Ch); no mention is made of AX=DE1Bh
    this API call may be made from within a hardware interrupt handler
SeeAlso: AX=101Bh,AX=101Ch,AX=DE13h,AX=DE1Bh
--------Q-15DE1D-----------------------------
INT 15 - DESQview v2.23+ - "PUTKEY" - FAKE USER KEYSTROKES
    AX = DE1Dh
    DX = segment of handle for task to receive keystroke
    BL = character
    BH = scan code
Return: AX = 0000h if successful
       nonzero if receiver's keyboard buffer was full
Notes:    the key is treated as though the user had pressed it, ignoring any
      script which may be bound to the key, and using the current field
      table if the keyboard object is in field processing mode
    multiple PUTKEYs are seen in the order in which they are executed
SeeAlso: AX=DE10h
--------Q-15DE1E-----------------------------
INT 15 - DESQview v2.23+ - "SCRNINFO" - GET TRUE VIDEO PARAMETERS
    AX = DE1Eh
Return: CL = actual number of rows on screen
    CH = actual number of columns on screen
    BL = actual video mode (may differ from INT 10/AH=0Fh return) (v2.26+)
Note:    this API call may be made from a hardware interrupt handler
SeeAlso: INT 10/AH=0Fh
--------Q-15DE1F-----------------------------
INT 15 - DESQview v2.23+ - "DOSUSER" - GET HANDLE OF TASK CURRENTLY USING DOS
    AX = DE1Fh
Return: BX = segment of task handle or 0000h if no tasks are using DOS
Note:    this API call may be made from within a hardware interrupt handler
SeeAlso: AX=DE13h,INT 21/AH=34h
--------Q-15DE20-----------------------------
INT 15 - DESQview v2.26+ - "DISPATCHINT" - INTERRUPT ANOTHER TASK
    AX = DE20h
    BX = segment of handle of task to interupt
    DX:CX -> FAR interrupt routine
    BP,SI,DI,DS,ES as required by interrupt routine
Return: nothing
Notes:    unlike "PGMINT" (AX=1021h), DISPATCHINT may be applied to the task
      making the DISPATCHINT call
    multiple "DISPATCHINT" calls are processed in the order in which they
      were executed
    the FAR routine is entered with the current ES, DS, SI, DI, and BP
      values, using the task's internal stack (see AX=101Ah); only SS:SP
      needs to be preserved
    this API call may be made from within a hardware interrupt handler
SeeAlso: AX=1021h,AX=DE2Ah
--------Q-15DE21-----------------------------
INT 15 - DESQview v2.26+ - "ASSERTVIR" - CONTROL 386 SCREEN VIRTUALIZATION
    AX = DE21h
    BX = new state
        0000h turn off
        nonzero turn on
Return: BX = old state of virtualization
Notes:    this API call may be made from within a hardware interrupt handler
    under DV 2.40 and 2.42, this call appears to have no effect and always
      returns a nonzero value in BX which appears to be the offset within
      the DV common memory segment of the caller's task object; it may
      only have an effect within a hardware interrupt handler
SeeAlso: AX=1117h,AX=DE17h
--------Q-15DE22-----------------------------
INT 15 - DESQview v2.26+ - "PROCESSMEM" - GET TASK MEMORY STATUS
    AX = DE22h
    DX = segment of task handle
Return: DX = total amount of memory in paragraphs
    BX = amount of system memory in paragraphs
    CX = largest block of system memory available in paragraphs
    AX = memory flags (see #0452)
Notes:    if the task handle is a child task, the returned values will be for the
      process containing the task, rather than the task itself
    if the process's system memory is swapped out, BX,CX,DX remain
      unchanged, because the memory usage cannot be determined
SeeAlso: AX=DE04h,AX=DE05h,AX=DE06h

Bitfields for DESQview process memory flags:
Bit(s)    Description    (Table 0452)
 0    system memory resides in shared memory
 1    process's memory is swapped out
 2    process's system memory is swapped out
--------Q-15DE23-----------------------------
INT 15 U - DESQview v2.31+ - ???
    AX = DE23h
    BX = ??? IRQ number on first PIC?
    CX = ??? IRQ number on second PIC?
Return: ???
Note:    called by QEMM 6.00+
--------Q-15DE24-----------------------------
INT 15 - DESQview v2.40+ - "XNEWPROC" - START NEW APPLICATION
    AX = DE24h
    BX = length of .DVP data
    CX = length of ??? string
    DS:SI -> ??? string
    ES:DI -> .DVP data (see #0331 at AX=102Ch)
Return: BX = segment of task handle??? or 0000h on error
Note:    this call is similar to AX=102Ch except that it can interpret the
      extended DVP data
SeeAlso: AX=102Ch
--------Q-15DE25-----------------------------
INT 15 - DESQview v2.40+ - "GETDVPATH" - GET DESQview DIRECTORY
    AX = DE25h
    ES:DI -> 67-byte buffer for ASCIZ directory name
Return: ES:DI buffer filled with directory from which DESQview was started
BUG:    DV 2.42 does not place a terminating NUL at the end of the directory
      name, so if the buffer is not cleared to zeros before the call,
      there is no way to tell where the directory name ends.  This bug
      has been fixed in DV 2.52 (DV/X 1.02)
SeeAlso: AX=DE2Eh,INT 21/AH=47h
--------Q-15DE26-----------------------------
INT 15 - DESQview v2.40+ - "GETFOREGROUND" - GET KEYBOARD FOCUS
    AX = DE26h
Return: BX = segment of handle for task with keyboard focus
Note:    under DESQview/X, the X server always has the keyboard focus unless a
      "direct" window is active
SeeAlso: AX=DE2Fh,INT 2F/AX=DE0Ah
--------Q-15DE27-----------------------------
INT 15 - DESQview v2.50+ - "ADDINSTANCEDATA" - ADD PER-TASK SAVE/RESTORE AREA
    AX = DE27h
    BX = type
        0000h process
        0001h task
    ES:DI -> list of Instance Item Structures (see #0453)
Return: CF clear if successful
        AX = ???
        BX = ???
    CF set on error
        AX = error code???
        0004h invalid BX value
Note:    DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
SeeAlso: INT 2F/AX=DE08h,INT 2F/AX=DE09h

Format of DESQview Instance Item Structure [one element of list]:
Offset    Size    Description    (Table 0453)
 00h    WORD    length of data area DESQview should save and restore on context
          switches (0000h = end of list)
 02h    DWORD    pointer to area to be saved/restored
--------Q-15DE28-----------------------------
INT 15 U - DESQview v2.50+ - ???
    AX = DE28h
    BX = segment of ??? or 0000h for default
    ???
Return: ???
Note:    DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
SeeAlso: AX=DE2Ah
--------Q-15DE29BX0000-----------------------
INT 15 U - DESQview/X - ???
    AX = DE29h
    BX = 0000h
    ???
Return: CF clear if successful
        ???
    CF set on error
Notes:    DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
    under DESQview 2.60, this function and all other subfunctions of
      AX=DE29h always return CF set, as they are unique to DESQview/X
--------Q-15DE29BX0001-----------------------
INT 15 U - DESQview/X - ???
    AX = DE29h
    BX = 0001h
    DX = segment of window handle
Return: CF clear if successful
        AX = ???
        DX = ???
    CF set on error
Note:    DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
--------Q-15DE29BX0002-----------------------
INT 15 U - DESQview/X - ???
    AX = DE29h
    BX = 0002h
    DX = segment of window handle
Return: CF clear if successful
        AX = ???
        DX = ???
    CF set on error
Note:    DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
--------Q-15DE29BX0003-----------------------
INT 15 U - DESQview/X - ???
    AX = DE29h
    BX = 0003h
    DX = segment of window handle
Return: CF clear if successful
        ???
    CF set on error
Note:    DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
--------Q-15DE29BX0004-----------------------
INT 15 U - DESQview/X - GET DISPLAY NAME
    AX = DE29h
    BX = 0004h
    CX = size of buffer in bytes
    DX = segment of window handle
    ES:DI -> buffer for display name
Return: CF clear if successful
        buffer filled with ASCIZ display name (truncated if necessary) or
          null string if no display
    CF set on error
Notes:    DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
    the name ":0" refers to the local display
--------Q-15DE29BX0005-----------------------
INT 15 U - DESQview/X - ???
    AX = DE29h
    BX = 0005h
    ???
Return: CF clear if successful
        ???
    CF set on error
Note:    under DESQview 2.60, this function and all other subfunctions of
      AX=DE29h always return CF set, as they are unique to DESQview/X
--------Q-15DE2A-----------------------------
INT 15 - DESQview v2.50+ - "DISPATCHINTAFTERDOS" - INTERRUPT ANOTHER TASK
    AX = DE2Ah
    BX = segment of handle for task to interrupt or 0000h for caller
    DX:CX -> interrupt routine
    BP,SI,DI,DS,ES as required by interrupt routine
Return: nothing
Notes:    DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
    this call is the same as AX=DE20h except that it will delay
      interrupting the specified task until after it has exited DOS
SeeAlso: AX=1021h,AX=DE20h
--------Q-15DE2B-----------------------------
INT 15 - DESQview v2.50+ - "OBJNEXT" - TRAVERSE OBJECT LIST
    AX = DE2Bh
    ES:DI -> starting object
        0000h:0000h for first object in list???
Return: AX = status
        0000h successful
        ES:DI -> next object of same type (window/non-window)
        0001h failed (ES:DI was not a valid handle)
Notes:    DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
    there are two separate lists, one for window/task objects and one
      for all other objects
SeeAlso: AX=1016h,AX=DE2Ah,AX=DE2Ch
--------Q-15DE2C-----------------------------
INT 15 - DESQview v2.50+ - "WININFO" - GET WINDOW INFORMATION
    AX = DE2Ch
    DX = window information format version (0100h for DESQview 2.5x)
    BX = segment of window handle or 0000h for default
    ES:DI -> buffer for window information (see #0454)
Return: AX = status
        0000h successful
Note:    DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
SeeAlso: AX=1000h,AX=1016h,AX=DE01h,AX=DE2Bh

Format of DESQview window information:
Offset    Size    Description    (Table 0454)
 00h    BYTE    task flag: 00h window, 01h task
 01h    BYTE    process number if owner task
        00h if non-owner task
 02h    WORD    segment of owner's handle, 0000h if orphaned
 04h    WORD    mapping context (see #0320 at AX=1016h)
 06h    BYTE    task status (see #0455)
 07h    BYTE    unused
 08h    WORD    status bits (see #0456)
 0Ah    BYTE    01h if foreground-only window

(Table 0455)
Values for DESQview task status:
 00h    "Waiting" waiting for input
 01h    "Idle" keyboard poll limit reached
 03h    same as 01h
 04h    "Pausing" INT 15/AX=1000h pause called
 04h    DV/X direct: user did something to allow task switch
 05h    "ModeChg" video mode about to be changed
 06h    "ModeNtf" notify that video mode changed
 07h    "MoniCh" requested change to other monitor
 08h    "StartPgm" control relinquished to start new process
 09h    "MgrCan" made window manager CANCEL command
 0Ah    "Slicing" time slice expired
 0Bh    "Exit DOS" notify on DOS calls
 0Ch    "Enter DOS" process is re-entering DOS
 0Dh    "Terminate" INT 21/AH=4Ch or task freed
 0Eh    "BrkNxt" Control-Break pressed
 0Fh    "MgrCol" keyboard focus taken away
 10h    "PgmInt" interrupted by API call from another task
 11h    "BldOpen" call to INT 15/AX=DE01h

Bitfields for DESQview task status bits:
Bit(s)    Description    (Table 0456)
 6    task is freeing another task
 5    process is being created
 4    user suspended process
 3    process suspended itself
 2    process is resized direct window (suspended)
 1    process swapped out
 0    DESQview process
--------Q-15DE2D-----------------------------
INT 15 U - DESQview v2.50+ - GET/SET SOCKET HANDLER
    AX = DE2Dh
    CX = direction
        FFFFh set socket handler
        DX:BX -> FAR function for socket interface
            must be of the format described under INT 63"DESQview"
              at #2764
        other get socket handler
        Return: DX:BX -> socket handler (see #2764)
Notes:    DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
    the "set" subfunction is normally called only by SOCKET.DVR
SeeAlso: AX=DE2Eh,INT 63"DESQview",#2764
--------Q-15DE2E-----------------------------
INT 15 U - DESQview v2.50+ - SOCKET API
    AX = DE2Eh
    DX:BX -> socket record (see #0458)
        0000h:0000h to create a new socket record
Return: CX = size of socket record in bytes
    DX:BX -> socket record which was used
Notes:    DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
    socket records are allocated from common memory
    for Unix compatibility, each socket and connection on a socket is
      allocated a DOS file handle (referencing an SFT for NUL) which is
      used on various calls to specify which of possibly multiple
      connections is to be operated upon
SeeAlso: AX=DE2Dh,INT 61/AX=0001h/SF=0001h"VINES",INT 63"DESQview"

(Table 0457)
Values for DESQview/X socket API function number:
 0000h    initialize socket???
 0001h    "gethostname"
 0002h    "ioctl" check for input
 0003h    "sleep" delay for specified period
 0004h    "htons" convert word to network (big-endian) byte order
 0005h    "select"
 0006h    "bsd_close"/"so_close" close socket
 0007h    NOP
 0008h    "connect" initiate connection on socket
 0009h    "recv"/"recvfrom" read from socket
 000Ah    "socket"
 000Bh    ???
 000Ch    "gethostbyname"
 000Dh    "send"/"sendto" write to socket
 000Eh    ??? (does something to all connections for process)
 000Fh    "getpid" get process identifier
 0010h    "gettimeofday"
 0011h    "bind" assign name to socket
 0012h    "listen" listen for connections on socket
 0013h    "accept" accept connection on socket
 0014h    connect to X server
 0015h    "gethostbyaddr" get host information for an address
 0016h    "getprotobyname"
 0017h    "getprotobynumber"
 0018h    "getservbyname"
 0019h    "getservbyport"
 001Ah    "getsockname" determine name bound to socket
 001Bh    "getpeername" get name of connected peer
 001Ch    "getsockopt"/"setsockopt"
 001Dh    "so_exit"     close all sockets for calling process
 001Eh    "issock" determine whether file handle references socket
 001Fh    "so_attach" reattach previously detached socket
 0020h    "so_detach" temporarily detach socket
 0021h    "dvpath" get DESQview directory (see also AX=DE24h)
 0022h    "NewProc" start new application (see also AX=102Ch)
 0023h    "so_linkup"
 0024h    "CanonicalPath" canonicalize filename (see also INT 21/AH=60h)
 0025h    indirect INT 15h call
 0026h    Network Manager interface
 0027h    "so_unlink"    close connection from "so_linkup"
 0028h    "raisepriority"
 0029h    "lowerpriority"
 002Ah    "so_private" ???
 FFFFh    "NetExit" (appears to be a NOP)

Format of DESQview/X socket record:
Offset    Size    Description    (Table 0458)
 00h    WORD    signature F0ADh
 02h    WORD    function number (see #0457)
 04h    WORD    returned error code (see #0478)
 06h    WORD    maximum message size??? (usually 0400h)
 08h    WORD    PSP segment to use or 0000h if socket not valid
 0Ah    WORD    scratch space (JFT size)
 0Ch    DWORD    scratch space (JFT address)
 10h    DWORD    mailbox handle (initialized by function 0000h)
 14h    DWORD    timer object handle (initialized by function 0000h)
---function 0000h---
 18h    WORD    (ret) ???
---function 0001h---
 18h    WORD    (ret) status???
 1Ah 128 BYTEs    (ret) ASCIZ hostname (empty string if not on network)
 9Ah    WORD    maximum length of hostname to return
---function 0002h---
 18h    WORD    (ret) status
 1Ah    WORD    socket's file handle
 1Ch    WORD    IOCTL function
        05h "FIONREAD" determine available input
        06h "FIONBIO" set blocking state of socket
 1Eh    WORD    (return, subfn 05h) number of bytes available for reading
        (call, subfn 06h) 0000h blocking, nonzero nonblocking
---function 0003h---
 18h  2 BYTEs    unused
 1Ah    WORD    delay time in seconds
---function 0004h---
 18h    WORD    (ret) result in network (big-endian) byte order
 1Ah    WORD    value to convert to network byte order
---function 0005h---
 18h    WORD    (ret) number of handles meeting the specified conditions???
 1Ah    WORD    number of file handles in each bitset
 1Ch    DWORD    bitset of socket handles to check for readability
 20h    DWORD    bitset of socket handles to check for writability
 24h    DWORD    bitset of socket handles to check for errors
 28h    WORD    timeout in ??? or 0000h to block until some socket ready
 2Ah    DWORD    ???
 2Eh    DWORD    ???
---function 0006h---
 18h    WORD    (ret) status: 0000h if successful, FFFFh on error
 1Ah    WORD    socket's file handle
---function 0008h---
 18h    WORD    (ret) status: 0000h if successful, FFFFh on error
 1Ah    WORD    socket's file handle
 1Ch    WORD    0001h if socket name specified, 0000h if not
 1Eh    WORD    length of socket name
 20h  N BYTEs    name of socket to which to connect
---function 0009h---
 18h    WORD    (ret) number of bytes actually read, 0000h if connection
            closed, or FFFFh on error
 1Ah    WORD    socket's file handle
 1Ch    WORD    number of bytes to read
 1Eh    WORD    flags
 20h    WORD    0000h if no source address desired
        0001h if source address is to be stored (datagram sockets)
 22h    WORD    length of source address
 24h 110 BYTEs    source address
 92h 1K BYTEs    buffer for data to be read
---function 000Ah---
 18h    WORD    (ret) socket's file handle or FFFFh on error
 1Ah    WORD    address family (0001h,0002h)
 1Ch    WORD    socket type
 1Eh    WORD    protocol
---function 000Bh---
 18h    WORD    (ret) 0001h if ??? or FFFFh on error
 1Ah    WORD    socket's file handle
 1Eh    WORD    (call) ???
---function 000Ch---
 18h 128 BYTEs    ASCIZ hostname (special case if empty string or "unix")
 98h    ???    (ret) packed 'hostent' structure
 A2h    ???    (ret) ???
---function 000Dh---
 18h    WORD    (ret) number of bytes actually written or FFFFh on error
 1Ah    WORD    socket's file handle
 1Ch    WORD    number of bytes to write
 1Eh    WORD    number of bytes to follow in subsequent writes???
 20h    WORD    flags
 22h    WORD    0000h if no destination specified, 0001h if destination present
 24h    WORD    0001h if broadcast message???, 0000h if not
        (ignored if no destination specified)
 26h    WORD    length of destination address
 28h 110 BYTEs    destination address
 96h 1K BYTEs    buffer containing data to be written
---function 000Eh---
 no additional fields
---function 000Fh---
 18h    DWORD    (ret) DESQview task handle of calling process
---function 0010h---
 18h    DWORD    (ret) current time
 1Ch    DWORD    (ret) ???
---function 0011h---
 18h    WORD    (ret) status: 0000h if successful, FFFFh on error
 1Ah    WORD    socket's file handle
 1Ch    WORD    length of name
 1Eh  N BYTEs    buffer for socket name
---function 0012h---
 18h    WORD    (ret) status: 0000h if successful, FFFFh on error
 1Ah    WORD    socket's file handle
 1Ch    WORD    maximum backlog of pending connections allowed on socket
---function 0013h---
 18h    WORD    (ret) file handle for new connection or FFFFh on error
 1Ah    WORD    listen()ing socket's file handle
 1Ch    WORD    (call) length of buffer for connecting entity's address
        (ret) actual length of address
 1Eh  N BYTEs    buffer for connecting entity's address (110 bytes???)
---function 0014h---
 18h    WORD    (ret) socket's file handle or FFFFh on error
 1Ah  4 BYTEs    (ret) ???
 1Eh    WORD    (ret) ???
 20h    WORD    (ret) ???
 22h 256 BYTEs    ASCIZ X display name
122h    ???
---function 0015h---
 18h    WORD    (call) type of address??? (test for 0001h seen)
 1Ah    WORD    (call) length of buffer for host address
 1Ch 110 BYTEs    buffer containing ASCIZ host address
 8Ah    WORD    (ret) offset of official host name
 8Ch    WORD    (ret) offset of alias list???
 8Eh    WORD    (ret) address type???
 90h    WORD    (ret) length of an address in bytes???
 92h    WORD    (ret) offset of address???
 9Ah  N BYTEs    (ret) buffer for hostname, alias list, and host address
---function 0016h---
 18h    ???    buffer for ASCIZ protocol name
 98h    ???
---function 0017h---
 18h    WORD    (call) protocol number
 1Ah    WORD    (ret) ??? or 0001h
---function 0018h---
 18h 128 BYTEs    buffer containing ASCIZ ???
 98h 128 BYTEs    buffer containing ASCIZ ???
118h    WORD    (ret) ???
---function 0019h---
 18h    WORD    port number
 1Ah 128 BYTEs    (call) ASCIZ host name
        (ret) packed servent strctures???
 9Ah    WORD    (ret) ???
---function 001Ah---
 18h    WORD    (ret) 0000h if successful, FFFFh on error
 1Ah    WORD    socket's file handle
 1Ch    WORD    (call) length of buffer for socket name
        (ret) actual length of socket name
 1Eh  N BYTEs    buffer for socket name
---function 001Bh---
 18h    WORD    (ret) status: 0000h if successful, FFFFh on error
 1Ah    WORD    socket's file handle
 1Ch    WORD    (call) size of buffer for name
        (ret) actual size of name
 1Eh  N BYTEs    buffer for peer's name
---function 001Ch---
 18h    WORD    (ret) status: 0000h if successful, FFFFh on error
 1Ah    WORD    direction: 0000h to get, 0001h to set
 1Ch    WORD    socket's file handle
 1Eh    WORD    option level
 20h    WORD    option name
 22h    WORD    (call) length of buffer for option value
        (ret) actual length of option value
 24h  N BYTEs    buffer for option value
---function 001Dh---
 no additional fields
---function 001Eh---
 18h    WORD    (ret) status: 0000h ??? or 0001h ???
 1Ah    WORD    file handle which may or may not be a socket
---function 001Fh---
 18h    WORD    (ret) file handle or FFFFh on error
 1Ah    DWORD    (call) pointer to Socket Context Record (see #0479) of a
            previously detached socket
---function 0020h---
 18h    WORD    (ret) status: 0000h if successful or FFFFh on error
 1Ah    WORD    socket's file handle
 1Ch    DWORD    (ret) pointer to Socket Context Record (see #0479) for
            the file handle
---function 0021h---
 18h 64 BYTEs    buffer for DESQview startup directory (see AX=DE25h)
---function 0022h---
 18h    DWORD    (ret) task handle of new application
 1Ch    WORD    size of .DVP data
 1Eh 129 BYTEs    ASCIZ ???
 9Fh  N BYTEs    .DVP data (see #0331 at AX=102Ch)
---function 0023h---
 18h    WORD    (ret) ??? or FFFFh on error
 1Ah    WORD    socket's file handle???
---function 0024h---
 18h    WORD    (ret) DOS error code (see #1020 at INT 21/AH=59h/BX=0000h)
            0000h if successful
 1Ah 129 BYTEs    ASCIZ filename/pathname
11Bh 129 BYTEs    ASCIZ canonicalized filename/pathname (see INT 21/AH=60h)
---function 0025h---
 18h    WORD    value of AX
 1Ah    WORD    value of BX
 1Ch    WORD    (call) value of CX for call if AH value other than 12h
        (call) number of stack parameters if AH value is 12h
        (ret) returned CX for calls other than INT 15/AH=12h
 1Eh    WORD    value of DX
 20h    WORD    value of DI
 22h    WORD    value of SI
 24h    WORD    value of DS
 26h    WORD    value of ES
 28h    WORD    (ret) value of FLAGS after call
 2Ah  N DWORDs    (call) stack parameters for INT 15/AH=12h call
        (ret) stack results from INT 15/AH=12h call
---function 0026h---
 18h    WORD    (call) Network Manager subfunction (see #0459)
        (ret) status??? (0000h on error)
 1Ah    WORD    (call) size of parameter data
        (ret) size of returned data
 1Ch  N BYTEs    (call) parameter data required by call (see #0460,#0461,#0477)
        (ret) result data (see #0470,#0471,#0476)
---function 0027h---
 18h    WORD    (ret) status: 0000h if successful, FFFFh on error
 1Ah    WORD    socket's file handle
---functions 0028h,0029h---
 18h    WORD    (call) file handle for which to set priority low/high
            FFFFh to change calling task's priority
---function 002Ah---
 no additional fields

(Table 0459)
Values for DESQview/X Network Manager subfunction:
 0004h    "so_exit"???
 0005h    "gethostbyname"
 0006h    "gethostname"
 0009h    "socket"
 000Dh    "gethostbyaddr"
 000Fh    "getprotobyname"
 0010h    get protocol name for protocol number
 0011h    "getservbyname"
 0012h    "getservbyport" (see #0463)
 0013h    "getsockname"??? (see #0464)
 0016h    "shutdown" (see #0465)
 0017h    kill Network Manager
 0018h    "getpeername"??? (see #0466)
 0019h    ??? (called by socket function 0000h) (see #0467)
 001Ah    ??? (see #0468)
 001Bh    "so_linkup" (see #0469)
 001Dh    "getnetstatus" get network services (see #0470)
 001Fh    "getpwuid"
 0020h    "getpwnam"
 0021h    "getpwvar"
 0022h    "crypt"
 0023h    "so_unlink"
 0024h    "getlogin" (see #0471)
 0028h    "sethostent"
 0029h    "gethostent"
 002Ah    "soaddhost"
 002Bh    "soupdatehost"
 002Ch    "sodeletehost"
 002Dh    "setservent"
 002Eh    "getservent"
 002Fh    "setpwent"
 0030h    "getpwent" (see #0472)
 0031h    "sethostpath" (see #0473)
 0032h    "endservent"
 0033h    "endhostent"
 0034h    "getnettype" get IP network number (see #0474)
 0035h    ??? (pops up Network Manager window)
 0037h    "getnettimeout" (see #0475)
 0038h    get machine name and IP address (see #0476)
 0039h    "getuid" (see #0477)
---DV/X v2.0+ ---
 0041h    "deletepwnam"
 0045h    "renamepw"

Format of Function 0026h/Subfunction 000Fh data:
Offset    Size    Description    (Table 0460)
 00h  8 BYTEs    (ret) ???

Format of Function 0026h/Subfunction 0010h data:
Offset    Size    Description    (Table 0461)
 00h  2 BYTEs    (ret) ???
 02h    WORD    (ret) protocol number
 04h    WORD    (call) protocol number for which to get name
 06h    WORD    (ret) ???
 08h    var    (ret) ASCIZ protocol name
 N    var    (ret) ASCIZ protocol name

Format of Function 0026h/Subfunction 0011h data:
Offset    Size    Description    (Table 0462)
 00h  8 BYTEs    ???
 08h    var    (ret) ASCIZ protocol name
    var    (ret) ASCIZ ??? name
    var    (ret) ASCIZ ??? name

Format of Function 0026h/Subfunction 0012h data:
Offset    Size    Description    (Table 0463)
 00h  8 BYTEs    (ret) ???

Format of Function 0026h/Subfunction 0013h data:
Offset    Size    Description    (Table 0464)
 00h 116 BYTEs    (ret) ???

Format of Function 0026h/Subfunction 0016h ("shutdown") data:
Offset    Size    Description    (Table 0465)
 00h    WORD    (ret) shutdown status (0000h successful, FFFFh error)
 02h  4 BYTEs    (ret) ???
 04h    WORD    (call) socket handle
 06*h    WORD    (call) what (0 = receives, 1 = sends, 2 = both)

Format of Function 0026h/Subfunction 0018h data:
Offset    Size    Description    (Table 0466)
 00h 116 BYTEs    (ret) ???

Format of Function 0026h/Subfunction 0019h data:
Offset    Size    Description    (Table 0467)
 00h  4 BYTEs    (ret) ???
 04h    DWORD    (ret) task handle of ???

Format of Function 0026h/Subfunction 001Ah data:
Offset    Size    Description    (Table 0468)
 00h 38 BYTEs    (ret) ???

Format of Function 0026h/Subfunction 001Bh data:
Offset    Size    Description    (Table 0469)
 00h 10 BYTEs    (ret) ???

Format of Function 0026h/Subfunction 001Dh return data [array]:
Offset    Size    Description    (Table 0470)
 00h    WORD    ??? or FFFFh if end of array
 02h  7 BYTEs    ???
 09h 27 BYTEs    ASCIZ name of service

Format of Function 0026h/Subfunction 0024h return data:
Offset    Size    Description    (Table 0471)
 00h    var    ASCIZ username

Format of Function 0026h/Subfunction 0030h data:
Offset    Size    Description    (Table 0472)
 00h    WORD    (call) UID or 0000h for current user
        (ret) ???
 02h    WORD    (ret) UID
 04h  6 BYTEs    (ret) ???
 0Ah    var    (ret) ASCIZ username
    var    (ret) ASCIZ encrypted password
    var    (ret) ASCIZ initial ("home") directory

Format of Function 0026h/Subfunction 0031h ("sethostpath") data:
Offset    Size    Description    (Table 0473)
 00h   4 BYTEs    ???
 04h 144 BYTEs    ASCIZ ???

Format of Function 0026h/Subfunction 0034h data:
Offset    Size    Description    (Table 0474)
 00h  1-3 BYTEs IP network number of caller's machine (low byte first)

Format of Function 0026h/Subfunction 0037h ("getnettimeout") return data:
Offset    Size    Description    (Table 0475)
 00h    WORD    (ret) timeout
 02h  2 BYTEs    (ret) ???

Format of Function 0026h/Subfunction 0038h return data:
Offset    Size    Description    (Table 0476)
 00h    BYTE    ???
 01h  4 BYTEs    IP address
 05h    var    ASCIZ machine name
    ???

Format of Function 0026h/Subfunction 0039h ("getuid") return data:
Offset    Size    Description    (Table 0477)
 00h    WORD    user ID
 02h  2 BYTEs    ???
SeeAlso: #0473,#0476

(Table 0478)
Values for DESQview/X socket error code:
 0000h    successful
 0009h    "BADF" bad file handle
 000Ch    "ENOMEM" out of memory
 000Eh    "EFAULT" bad address
 0016h    "EINVAL" invalid argument
 0018h    "EMFILE" too many open files
 0020h    "EPIPE" ??? broken pipe
 0023h    "EWOULDBLOCK" operation cannot be completed at this time
 0024h    "EINPROGRESS" operation now in progress
 0026h    "ENOTSOCK" socket invalid
 0028h    "EMSGSIZE" message too long to send atomically
 002Ch    "ESOCKTNOSUPPORT" socket type not supported
 002Fh    "EAFNOSUPPORT" address family not supp. by protocol fam.
 0031h    "EDOM" argument too large
 0038h    "EISCONN" socket is already connected
 0039h    "ENOTCONN" socket is not connected

Format of DESQview/X Socket Context Record:
Offset    Size    Description    (Table 0479)
 00h    DWORD    pointer to next Socket Context Record, 0000h:0000h if last
 04h    WORD    SFT index for socket, 00FFh if not connected, FFFFh if detached
 06h    WORD    PSP segment of owner or 0000h
 08h    WORD    mapping context of owning window (see #0320 at AX=1016h)
 0Ah  2 BYTEs    ???
 0Ch    WORD    address family
 0Eh    WORD    socket type
 10h    WORD    protocol
 12h    WORD    socket state
        0001h created
        0002h bound
        0003h listening???
        0005h connected
 14h    DWORD    timer object handle
 18h    DWORD    object handle (mailbox???)
 1Ch    DWORD    object handle of parent of above object or 0000h:0000h
 20h    DWORD    pointer to ??? or 0000h
 24h  6 BYTEs    ???
 2Ah    WORD    file handle for socket or FFFFh
 2Ch  2 BYTEs    ???
 2Eh    WORD    nonzero if socket nonblocking
---network connections only---
 30h  2 BYTEs    ???
 32h    WORD    ???
 34h  4 BYTEs    (big-endian) IP address of remote
 38h  6 BYTEs    ???
--------Q-15DE2F-----------------------------
INT 15 - DESQview v2.50+ - "VIDEONOTIFY" - HAS DIRECT WINDOW BEEN ACTIVE?
    AX = DE2Fh
Return: BX = status
        0001h keyboard focus has been given to a direct window since the
        last call
        0000h if not
Notes:    DESQview 2.50-2.53 are distributed as part of DESQview/X v1.00-1.10.
    Quarterdeck stated that this call would not be available under future
      versions of DESQview Classic, but it is still present in v2.60
--------Q-15DE30-----------------------------
INT 15 - DESQview v2.50+ - "GETDVXVERSION" - GET DESQview/X VERSION
    AX = DE30h
Return: BX = version (BH=major, BL=minor) or 0000h if not DESQview/X
Notes:    DESQview 2.50-2.53 are distributed as part of DESQview/X v1.00-1.10.
    you must first check the DESQview version to verify that it is 2.50 or
      greater
SeeAlso: INT 21/AH=2Bh/CX=4445h
--------Q-15DE31-----------------------------
INT 15 - DESQview/X v1.10 - ???
    AX = DE31h
    CX = ???
        0000h ???
        nonzero ???
    ???
Return: ???
--------b-15DF-------------------------------
INT 15 - Juko UNIQUE UX BIOS - TURBO MODE CONTROL
    AH = DFh
    AL = function
        00h turn on Turbo mode
        01h turn off Turbo mode
        02h set Turbo mode according to hardware switch
SeeAlso: INT 13/AX=FFFFh
--------b-15E00F-----------------------------
INT 15 - Compaq Systempro - MULTIPROCESSOR DISPATCH
    AX = E00Fh
    ES:BX -> start of 2nd processor's execution
Return: AL = status
        0Fh successful
        00h failure
SeeAlso: AX=E10Eh,AX=E200h
--------b-15E10E-----------------------------
INT 15 - Compaq Systempro - MULTIPROCESSOR END-OF-DISPATCH
    AX = E10Eh
    ES:BX -> start of 2nd processor's execution
Return: AL = status
        0Fh successful (halted)
        00h failure (not halted)
SeeAlso: AX=E00Fh,AX=E200h
--------b-15E200-----------------------------
INT 15 - Compaq Systempro - MULTIPROCESSOR AVAILABLE
    AX = E200h
Return: AX bit 15 set if 2nd processor available
SeeAlso: AX=E00Fh,AX=E10Eh
--------b-15E4-------------------------------
INT 15 - Tandy??? - ???
    AH = E4h
    AL = subfunction
        21h, 89h, 8Ah, 8Bh called by 386MAX v6.01
    DL = ???
Return: DL = 00h if successful???
Note:    the section of code in 386MAX which calls these functions also checks
      whether the ROM BIOS has both Tandy and Phoenix Technologies
      signatures if these calls fail; the Tandy 1000SL/TL BIOS does not
      support this function, however, returning the usual CF set/AH=86h for
      "unsupported function".
--------b-15E4-------------------------------
INT 15 - Compaq ROM BIOS 03/08/93 and newer - ???
    AH = E4h
    AL = subfunction
        00h get ???
        Return: CF clear
            AH = 00h
            CX = 0000h
            BX = ??? (read from [XBDA:0094h])
        01h,02h unsupported by this ROM version
        Return: CF set, AH = 86h
        80h,90h,A0h,B0h,C0h,D0h,E0h,F0h set ???
        Return: CF clear
            AH = 00h
            CX = 0000h
            BX = ???
        81h,91h,A1h,B1h,C1h,D1h,E1h,F1h unsupported by 3/8/93&4/8/93 ROMs
        Return: CF set, AH = 86h
Notes:    functions 80h/90h/etc. are not supported by the 4/8/93 EISA System ROM
    these functions are not supported by the 7/26/93 LTE Lite 386 ROM
--------b-15E800-----------------------------
INT 15 - Compaq Contura - GET ???
    AX = E800h
Return: AX = 0000h
    BH = 00h
    BL = ??? (read from port 0C7Ch)
    CH = ???
    CL = ???
    DX = 0000h
Note:    also supported by 3/8/93 DESKPRO/i and 7/26/93 LTE Lite 386 ROM BIOS
--------b-15E800-----------------------------
INT 15 - Compaq Contura Aero, Contura 400 - GET SYSTEM MODEL CODE???
    AX = E800h
    BX = ??? (0000h)
Return: CF clear if successful
        BH = 02h
        BL = submodel??? (0Ch,0Dh,34h,38h,40h,44h,48h,64h,68h)
    CF set on error
    others???
Notes:    used by Compaq's SOFTPAQ number 0937 EPPBIOS.SYS to determine whether
      the Enhanced Parallel Port expected by that driver is available
    used by Compaq's SOFTPAW number 0856 VOLCTRL.EXE to determine whether
      volume control hardware expected by that driver is available
--------b-15E800-----------------------------
INT 15 - Compaq Prolinea - GET ???
    AX = E800h
    BX = ??? (1369h)
Return: BH = 01h
    BL = ???
    others???
Note:    used by Compaq's SOFTPAQ number 0718 INT10_04.SYS to determine whether
      the fix that driver applies is required (will not install if BX on
      return is other than 010Eh or 010Fh)
SeeAlso: AX=E802h
--------b-15E801-----------------------------
INT 15 - Phoenix BIOS v4.0 - GET MEMORY SIZE FOR >64M CONFIGURATIONS
    AX = E801h
Return: CF clear if successful
        AX = extended memory between 1M and 16M, in K (max 3C00h = 15MB)
        BX = extended memory above 16M, in 64K blocks
        CX = configured memory 1M to 16M, in K
        DX = configured memory above 16M, in 64K blocks
    CF set on error
Notes:    supported by the A03 level (6/14/94) and later XPS P90 BIOSes, as well
      as the Compaq Contura, 3/8/93 DESKPRO/i, and 7/26/93 LTE Lite 386 ROM
      BIOS
    supported by AMI BIOSes dated 8/23/94 or later
SeeAlso: AH=8Ah"Phoenix",AX=E802h,AX=E820h"Phoenix",AX=E881h"Phoenix"
--------b-15E802-----------------------------
INT 15 - Compaq Contura - GET ???
    AX = E802h
Return: CF clear
    AX = 0000h
    BX = ???
    CX = 0000h
Note:    this function is also supported by the LTE Lite 25c, 25E, and 486; not
      supported by LTE Lite 20 and 25.
SeeAlso: AX=E801h"Phoenix"
--------b-15E820-----------------------------
INT 15 - Phoenix BIOS v4.0 - GET SYSTEM MEMORY MAP
    AX = E820h
    EDX = 534D4150h ('SMAP')
    EBX = continuation value or 00000000h to start at beginning of map
    ECX = number of bytes to copy ( >= 20 bytes)
    ES:DI -> buffer for result (see #0480)
Return: CF clear if successful
        EAX = 534D4150h ('SMAP')
        ES:DI buffer filled
        EBX = next offset from which to copy or 00000000h if all done
        ECX = actual length returned in bytes
    CF set on error
        AH = error code (86h) (see #0400 at INT 15/AH=80h)
Notes:    supported by the A03 level (6/14/94) and later XPS P90 BIOSes
    supported by AMI BIOSes dated 8/23/94 or later
    a maximum of 20 bytes will be transferred at one time, even if ECX is
      higher
    if this function is not supported, an application should fall back
      to AX=E802h, AX=E801h, and then AH=88h
    the BIOS is permitted to return a nonzero continuation value in EBX
      and indicate that the end of the list has already been reached by
      returning with CF set on the next iteration
    this function will return base memory and ISA/PCI memory contiguous
      with base memory as normal memory ranges; it will indicate
      chipset-defined address holes which are not in use and motherboard
      memory-mapped devices, and all occurrences of the system BIOS as
      reserved; standard PC address ranges will not be reported
SeeAlso: AX=E801h"Phoenix",AX=E881h,MEM xxxxh:xxx0h"ACPI"

Format of Phoenix BIOS system memory map address range descriptor:
Offset    Size    Description    (Table 0480)
 00h    QWORD    base address
 08h    QWORD    length in bytes
 10h    DWORD    type of address range (see #3460)

(Table 3460)
Values for System Memory Map address type:
 01h    memory, available to OS
 02h    reserved, not available (e.g. system ROM, memory-mapped device)
 03h    ACPI Reclaim Memory (usable by OS after reading ACPI tables)
 04h    ACPI NVS Memory (OS is required to save this memory between NVS
      sessions)
 other    not defined yet -- treat as Reserved
SeeAlso: #0480
--------b-15E881-----------------------------
INT 15 - Phoenix BIOS v4.0 - GET MEMORY SIZE FOR >64M CONFIGURATIONS (32-bit)
    AX = E881h
Return: CF clear if successful
        EAX = extended memory between 1M and 16M, in K (max 3C00h = 15MB)
        EBX = extended memory above 16M, in 64K blocks
        ECX = configured memory 1M to 16M, in K
        EDX = configured memory above 16M, in 64K blocks
    CF set on error
Note:    supported by AMI BIOSes dated 8/23/94 or later
SeeAlso: AX=E801h"Phoenix",AX=E820h"Phoenix"
--------m-15F200CX454D-----------------------
INT 15 - Tandon memory mapper - Tandon MAPPER HARDWARE INITIALIZATION CHECK ???
    AX = F200h
    CX = 454Dh
Return: CF clear if hardware already initialised
        BX = upper RAM areas in use
        bit 0: C000-C3FF
        bit 1: C400-C7FF
        ...
        bit 11: EC00-EFFF
    CF set if hardware not initialised yet
--------B-1600-------------------------------
INT 16 - KEYBOARD - GET KEYSTROKE
    AH = 00h
Return: AH = BIOS scan code
    AL = ASCII character
Notes:    on extended keyboards, this function discards any extended keystrokes,
      returning only when a non-extended keystroke is available
    the BIOS scan code is usually, but not always, the same as the hardware
      scan code processed by INT 09.  It is the same for ASCII keystrokes
      and most unshifted special keys (F-keys, arrow keys, etc.), but
      differs for shifted special keys
    some (older) clone BIOSes do not discard extended keystrokes and manage
      function AH=00h and AH=10h the same
    the K3PLUS v6.00+ INT 16 BIOS replacement doesn't discard extended
      keystrokes (same as with functions 10h and 20h), but will always
      translate prefix E0h to 00h. This allows old programs to use extended
      keystrokes and should not cause compatibility problems
SeeAlso: AH=01h,AH=05h,AH=10h,AH=20h,AX=AF4Dh"K3PLUS",INT 18/AH=00h
--------B-1601-------------------------------
INT 16 - KEYBOARD - CHECK FOR KEYSTROKE
    AH = 01h
Return: ZF set if no keystroke available
    ZF clear if keystroke available
        AH = BIOS scan code
        AL = ASCII character
Note:    if a keystroke is present, it is not removed from the keyboard buffer;
      however, any extended keystrokes which are not compatible with 83/84-
      key keyboards are removed by IBM and most fully-compatible BIOSes in
      the process of checking whether a non-extended keystroke is available
    some (older) clone BIOSes do not discard extended keystrokes and manage
      function AH=00h and AH=10h the same
    the K3PLUS v6.00+ INT 16 BIOS replacement doesn't discard extended
      keystrokes (same as with functions 10h and 20h), but will always
      translate prefix E0h to 00h. This allows old programs to use extended
      keystrokes and should not cause compatibility problems
SeeAlso: AH=00h,AH=11h,AH=21h,INT 18/AH=01h
--------B-1602-------------------------------
INT 16 - KEYBOARD - GET SHIFT FLAGS
    AH = 02h
Return: AL = shift flags (see #0481)
    AH destroyed by many BIOSes
SeeAlso: AH=12h,AH=22h,INT 17/AH=0Dh,INT 18/AH=02h

Bitfields for keyboard shift flags:
Bit(s)    Description    (Table 0481)
 7    Insert active
 6    CapsLock active
 5    NumLock active
 4    ScrollLock active
 3    Alt key pressed (either Alt on 101/102-key keyboards)
 2    Ctrl key pressed (either Ctrl on 101/102-key keyboards)
 1    left shift key pressed
 0    right shift key pressed
SeeAlso: #0486,#2992,MEM 0040h:0017h
--------B-1603-------------------------------
INT 16 - KEYBOARD - SET TYPEMATIC RATE AND DELAY
    AH = 03h
    AL = subfunction
        00h set default delay and rate (PCjr and some PS/2)
        01h increase delay before repeat (PCjr)
        02h decrease repeat rate by factor of 2 (PCjr)
        03h increase delay and decrease repeat rate (PCjr)
        04h turn off typematic repeat (PCjr and some PS/2)
        05h set repeat rate and delay (AT,PS)
        BH = delay value (00h = 250ms to 03h = 1000ms)
        BL = repeat rate (00h=30/sec to 0Ch=10/sec [def] to 1Fh=2/sec)
        06h get current typematic rate and delay (newer PS/2s)
        Return: BL = repeat rate (above)
            BH = delay (above)
Return: AH destroyed by many BIOSes
Note:    use INT 16/AH=09h to determine whether some of the subfunctions are
      supported
SeeAlso: INT 16/AH=09h,AH=29h"HUNTER",AH=2Ah"HUNTER"
--------B-1604-------------------------------
INT 16 - KEYBOARD - SET KEYCLICK (PCjr only)
    AH = 04h
    AL = keyclick state
        00h off
        01h on
Return: AH destroyed by many BIOSes
SeeAlso: AH=03h,AH=04h"K3PLUS"
--------b-1604-------------------------------
INT 16 - Tandy 2000 - KEYBOARD - FLUSH KEYBOARD BUFFER
    AH = 04h
Note:    this interrupt is identical to INT 51 on the Tandy 2000
SeeAlso: INT 16/AH=00h,INT 16/AH=02h,INT 16/AH=05h"Tandy 2000"
SeeAlso: INT 51"Tandy 2000"
--------K-1604-------------------------------
INT 16 - K3PLUS v6.22+ - SET KEYCLICK
    AH = 04h
    AL = keyclick state
        00h keyclick off, leave loudness setting unchanged
        01h keyclick on, leave loudness setting unchanged
        else
           bit 0: keyclick enabled if set
           bits 7-1: new keyclick loudness (non-zero)
Return: AH destroyed by many BIOSes
Note:    Applications which try to set a new loudness, but are unsure of the
      results of other INT 16/AH=04h implementations, should set the new
      loudness first, and then call this function again with AL=01h or
      AL=00h
SeeAlso: AH=03h,AH=04h"KEYBOARD",AX=AF4Dh
--------B-1605-------------------------------
INT 16 - KEYBOARD - STORE KEYSTROKE IN KEYBOARD BUFFER (AT/PS w enh keybd only)
    AH = 05h
    CH = BIOS scan code
    CL = ASCII character
Return: AL = status
        00h if successful
        01h if keyboard buffer full
    AH destroyed by many BIOSes
Notes:    under DESQview, a number of "keystrokes" invoke specific
      DESQview-related actions when they are read from the keyboard
      buffer (see #0482)
    similarly, some "keystrokes" invoke special functions on the HP 100LX
      and HP 200LX (see #0483)
SeeAlso: AH=00h,AH=25h"K3",AH=71h,AX=AF4Dh,AH=FFh,INT 15/AX=DE10h

(Table 0482)
Values for pseudo-keystrokes for DESQview:
 38FBh or FB00h    switch to next window (only if main menu already popped up)
 38FCh or FC00h    pop up DESQview main menu
 38FEh or FE00h    close the current window
 38FFh or FF00h    pop up DESQview learn menu

(Table 0483)
Values for pseudo-keystrokes for HP 100LX/200LX:
 EE00h    pop up topcard display and set other system manager applications
      into sleep mode
--------B-1605-------------------------------
INT 16 - KEYBOARD - SELECT KEYBOARD LAYOUT (PCjr only)
    AH = 05h
    AL = function
        01h set keyboard layout to French
        02h set keyboard layout to German
        03h set keyboard layout to Italian
        04h set keyboard layout to Spanish
        05h set keyboard layout to UK
        80h check if function supported
        Return: AL <> 80h if supported
Return: ???
    AH destroyed by many BIOSes
Note:    this function is called by the DOS 3.2 KEYBxx.COM
SeeAlso: AH=92h,AH=A2h,AX=AF4Dh
--------b-1605-------------------------------
INT 16 - Tandy 2000 - KEYBOARD - RESET KEYBOARD
    AH = 05h
Desc:    reset the keyboard and flush the keyboard buffer
Note:    this interrupt is identical to INT 51 on the Tandy 2000
SeeAlso: INT 16/AH=00h,INT 16/AH=02h,INT 16/AH=03h,INT 51"Tandy 2000"
--------B-1609-------------------------------
INT 16 - KEYBOARD - GET KEYBOARD FUNCTIONALITY
    AH = 09h
Return: AL = supported keyboard functions (see #0484)
    AH destroyed by many BIOSes
Notes:    this function is only available if bit 6 of the second feature byte
      returned by INT 15/AH=C0h is set (see #0411)
    reportedly, the Award Modular BIOS v4.50G returns the keyboard function
      flags in AH instead of AL, and provides this function even though
      its availability is not indicated by INT 15/AH=C0h
SeeAlso: AH=03h,AH=0Ah,AH=10h,AH=11h,AH=12h,AH=20h,AH=21h,AH=22h,INT 15/AH=C0h

Bitfields for supported keyboard functions:
Bit(s)    Description    (Table 0484)
 7    reserved
 6    INT 16/AH=20h-22h supported (122-key keyboard support)
 5    INT 16/AH=10h-12h supported (enhanced keyboard support)
 4    INT 16/AH=0Ah supported
 3    INT 16/AX=0306h supported
 2    INT 16/AX=0305h supported
 1    INT 16/AX=0304h supported
 0    INT 16/AX=0300h supported
SeeAlso: #0413
--------B-160A-------------------------------
INT 16 - KEYBOARD - GET KEYBOARD ID
    AH = 0Ah
Return: BX = keyboard ID (see #0485)
    AH destroyed by many BIOSes
Notes:    check return value from AH=09h to determine whether this function is
      supported
    this function is also supported by the K3PLUS v6.00+ INT 16 BIOS
      replacement
SeeAlso: AH=09h,AX=AF4Dh

(Table 0485)
Values for keyboard ID:
 0000h    no keyboard attached
 41ABh    Japanese "G" keyboard (translate mode)
    MF2 Keyboard (usually in translate mode)
 54ABh    Japanese "P" keyboard (translate mode)
 83ABh    Japanese "G" keyboard (pass-through mode)
    MF2 Keyboard (pass-through mode)
 84ABh    Japanese "P" keyboard (pass-through mode)
 90ABh    old Japanese "G" keyboard
 91ABh    old Japanese "P" keyboard
 92ABh    old Japanese "A" keyboard
--------B-1610-------------------------------
INT 16 - KEYBOARD - GET ENHANCED KEYSTROKE (enhanced kbd support only)
    AH = 10h
Return: AH = BIOS scan code
    AL = ASCII character
Notes:    if no keystroke is available, this function waits until one is placed
      in the keyboard buffer
    the BIOS scan code is usually, but not always, the same as the hardware
      scan code processed by INT 09.  It is the same for ASCII keystrokes
      and most unshifted special keys (F-keys, arrow keys, etc.), but
      differs for shifted special keys.
    unlike AH=00h, this function does not discard extended keystrokes
    INT 16/AH=09h can be used to determine whether this function is
      supported, but only on later model PS/2s
SeeAlso: AH=00h,AH=09h,AH=11h,AH=20h
--------B-1611-------------------------------
INT 16 - KEYBOARD - CHECK FOR ENHANCED KEYSTROKE (enh kbd support only)
    AH = 11h
Return: ZF set if no keystroke available
    ZF clear if keystroke available
        AH = BIOS scan code
        AL = ASCII character
Notes:    if a keystroke is available, it is not removed from the keyboard buffer
    unlike AH=01h, this function does not discard extended keystrokes
    some versions of the IBM BIOS Technical Reference erroneously report
      that CF is returned instead of ZF
    INT 16/AH=09h can be used to determine whether this function is
      supported, but only on later model PS/2s
SeeAlso: AH=01h,AH=09h,AH=10h,AH=21h
--------B-1612-------------------------------
INT 16 - KEYBOARD - GET EXTENDED SHIFT STATES (enh kbd support only)
    AH = 12h
Return: AL = shift flags 1 (same as returned by AH=02h) (see #0486)
    AH = shift flags 2 (see #0487)
Notes:    AL bit 3 set only for left Alt key on many machines
    AH bits 7 through 4 always clear on a Compaq SLT/286
    INT 16/AH=09h can be used to determine whether this function is
      supported, but only on later model PS/2s
    many BIOSes (including at least some versions of Phoenix and AMI) will
      destroy AH on return from functions higher than AH=12h, returning
      12h less than was in AH on entry (due to a chain of DEC/JZ
      instructions)
SeeAlso: AH=02h,AH=09h,AH=22h,AH=51h,INT 17/AH=0Dh

Bitfields for keyboard shift flags 1:
Bit(s)    Description    (Table 0486)
 7    Insert active
 6    CapsLock active
 5    NumLock active
 4    ScrollLock active
 3    Alt key pressed (either Alt on 101/102-key keyboards)
 2    Ctrl key pressed (either Ctrl on 101/102-key keyboards)
 1    left shift key pressed
 0    right shift key pressed
SeeAlso: #0481,#0487,MEM 0040h:0017h,#M009

Bitfields for keyboard shift flags 2:
Bit(s)    Description    (Table 0487)
 7    SysReq key pressed (SysReq is often labeled SysRq)
 6    CapsLock pressed
 5    NumLock pressed
 4    ScrollLock pressed
 3    right Alt key pressed
 2    right Ctrl key pressed
 1    left Alt key pressed
 0    left Ctrl key pressed
SeeAlso: #0486,MEM 0040h:0018h,#M010
--------J-1613-------------------------------
INT 16 - DOS/V - DOUBLE-BYTE CHARACTER SET SHIFT CONTROL
    AH = 13h
    AL = function
        00h set shift status
        DX = shift status (see #0488), must preserve internal status
              bits
        01h get shift status
        Return: DX = current shift status (see #0488)
Note:    these functions are supplied by the Japanese Front-End Processor
SeeAlso: AH=14h,INT 21/AX=6301h

Bitfields for DOS/V shift status:
Bit(s)    Description    (Table 0488)
 0    full-size rather than half-size
 2-1    character input mode
    00 alphanumeric, 01 Katakana, 10 Hiragana, 11 unused
 5-3    internal status
 6    Romaji enabled
 7    Katakana to Kanji conversion enabled
 15-8    internal status
--------J-1614-------------------------------
INT 16 - DOS/V - SHIFT STATUS DISPLAY CONTROL
    AH = 14h
    AL = function
        00h enable display
        01h disable display
        02h get display state
        Return: AL = current state (00h enabled, 01h disabled)
Desc:    control the screen-bottom shift status row(s) for the Japanese
      Front-End Processor
SeeAlso: AH=13h,INT 10/AH=19h,INT 10/AH=1Dh
--------B-1620-------------------------------
INT 16 - KEYBOARD - GET 122-KEY KEYSTROKE (122-key kbd support only)
    AH = 20h
Return: AH = BIOS scan code (see AH=10h)
    AL = ASCII character
Note:    use AH=09h to determine whether this function is supported
SeeAlso: AH=00h,AH=09h,AH=10h,AH=21h,AH=22h
--------b-1620------------------------------------
INT 16 - HUNTER 16 - SET TEMPORARY SHIFT
    AH = 20h
    AL = shift status (see #0489)
Notes:    the Husky Hunter 16 is an 8088-based ruggedized laptop.     Other family
      members are the Husky Hunter, Husky Hunter 16/80, and Husky Hawk.
    the user can override the specified settings by pressing the keys

Bitfields for HUNTER 16 shift status:
Bit(s)    Description    (Table 0489)
 4    Scroll Lock on
 5    Num Lock on
 6    Caps Lock on
--------K-1620-------------------------------
INT 16 O - K3 v1.5x, K3PLUS v5.xx - GET EXTENDED BUFFER STATE
    AH = 20h
Return: AX = K3 version
    ES:BX -> extended keyboard buffer start
    ES:DX -> extended keyboard buffer end
    ES:SI -> next keystroke
    ES:DI -> last keystroke in buffer
    CX = number of keystrokes in buffer
Program: K3PLUS is an extended keyboard driver by Matthias Paul and Axel C.
      Frinke, originally based on the K3 extended German keyboard driver
      by Martin Gerdes published in c't magazine in 1988
Note:    this function was normally unsupported under K3PLUS v6.00-v6.22 and
      is no longer supported by v6.30+; use AX=AF20h instead
SeeAlso: AH=25h"K3",AX=AF20h,INT 2F/AX=D44Fh/BX=0000h,INT 2F/AX=ED58h
--------B-1621-------------------------------
INT 16 - KEYBOARD - CHECK FOR 122-KEY KEYSTROKE (122-key kbd support only)
    AH = 21h
Return: ZF set if no keystroke available
    ZF clear if keystroke available
        AH = BIOS scan code
        AL = ASCII character
Notes:    use AH=09h to determine whether this function is supported
    some versions of the IBM BIOS Technical Reference erroneously report
      that CF is returned instead of ZF
    K3PLUS v6.00+ supports this function as an alias of AH=11h
SeeAlso: AH=01h,AH=09h,AH=11h,AH=20h,AH=21h
--------b-1621------------------------------------
INT 16 - HUNTER 16 - CONTROL SHIFT KEYS
    AH = 21h
    AL = shift keys to control (see #0481)
    BL = shift state for disabled keys
Note:    If a bit in AL is set the key is disabled and set to the state of the
      corresponding bit in BL
SeeAlso: AH=20h"HUNTER",AH=22h"HUNTER"
--------B-1622-------------------------------
INT 16 - KEYBOARD - GET 122-KEY SHIFT STATUS (122-key kbd support only)
    AH = 22h
Return: AL = shift flags 1 (see #0486)
    AH = shift flags 2 (see #0487)
Notes:    use AH=09h to determine whether this function is supported
    K3PLUS v6.00+ supports this function as an alias of AH=12h
SeeAlso: AH=02h,AH=09h,AH=12h,AH=20h,AH=21h
--------b-1622------------------------------------
INT 16 - HUNTER 16 - CONTROL CTRL-ALT-DEL
    AH = 22h
    AL = new Ctrl-Alt-Del state (00h enabled, nonzero disabled)
    BX = 0708h
    CX = 0910h
    DX = 1112h
Return: AL = 00h if successful
SeeAlso: AH=21h"HUNTER",AH=23h"HUNTER",AH=2Ah
--------b-1623------------------------------------
INT 16 - HUNTER 16 - CONTROL EMERGENCY BREAKOUT
    AH = 23h
    AL = new state of breakout (00h enabled, nonzero disabled)
    BX = 0708h
    CX = 0910h
    DX = 1112h
Return: AL = 00h if successful
Desc:    Enables or disables the emergency breakout feature, where the
      Hunter 16 at power on checks whether the X and P keys are pressed.
      If so the machine will boot rather than continue the running program
SeeAlso: AH=22h"HUNTER"
--------b-1624------------------------------------
INT 16 - HUNTER 16 - REDEFINE KEY CODES
    AH = 24h
    AL = Matrix Code (see #0490)
    BL = new Key code
Return: AL = status (00h successful, nonzero failed)
SeeAlso: AH=2Bh,AH=2Ch

(Table 0490)
Values for HUNTER 16 Matrix Code:
 Code  Key        Code    Key        Code    Key
 00h   Esc key        1Eh    Space        3Bh    L
 01h   1        21h    0        3Ch    ,
 02h   Q        22h    -        3Eh    Right shift
 03h   Tab        23h    '        42h    8
 04h   Num Lock        24h    Keypad 4    43h    7
 05h   \        25h    Enter        44h    U
 08h   LShift        26h    Keypad 7    45h    I
 09h   Ctrl        27h    .        46h    J
 0Ah   "Paw" key    28h    Keypad 1    47h    K
 0Bh   2        29h    Keypad 0    48h    M
 0Ch   W        2Ch    =        49h    N
 0Dh   A        2Dh    Backspace    4Ah    /
 0Eh   S        2Eh    Keypad 8    4Dh    6
 0Fh   Z        2Fh    Keypad 9    4Eh    5
 11h   Alt        30h    Keypad 5    4Fh    T
 16h   4        31h    Keypad 6    50h    Y
 17h   3        32h    Keypad 2    51h    G
 18h   E        33h    Keypad 3    52h    H
 19h   R        34h    Keypad .    53h    B
 1Ah   D        37h    9        54h    V
 1Bh   F        38h    O        55h    #
 1Ch   X        39h    P        58h    Pwr
 1Dh   C        3Ah    ;        59h    Shift Pwr
--------b-1625------------------------------------
INT 16 - HUNTER 16 - RESET KEYBOARD
    AH = 25h
Return: AL = 00h
Desc:    restores the standard keyboard layout after any remapping
SeeAlso: AH=24h,AH=2Bh,AH=2Ch
--------K-1625-------------------------------
INT 16 O - K3 v1.5x, K3PLUS v5.xx - COPY INTO EXTENDED BUFFER
    AH = 25h
    CX = number of keystrokes to copy
    ES:SI -> buffer containing keystrokes
Return: CF clear if successful
    CF set on error (i.e. buffer full)
        CX = number of keystrokes NOT transferred
        ES:SI -> first keystroke not transferred
Note:    this function was normally unsupported under K3PLUS v6.00-v6.22 and
      is no longer supported by v6.30+; use AX=AF25h instead
SeeAlso: AH=05h,AH=20h"K3",AX=AF25h,INT 2F/AX=D44Fh/BX=0001h
--------b-1626------------------------------------
INT 16 - HUNTER 16 - CONTROL KEYCLICK
    AH = 26h
    AL = new state of keyclicks (00h disabled, 01h enabled)
Return: AL = 00h
SeeAlso: AH=2Ah
--------b-1627------------------------------------
INT 16 - HUNTER 16 - CONTROL SCREEN DUMP AREA
    AH = 27h
    AL = what to dump
        00h whole (virtual) window
        01h LCD window only
Return: AL = 00h
Desc:    control whether printscren dumps the whole 80x25 screen or only the
      part displayed in the LCD window
Note:    the Hunter 16 has a 240x64 LCD display which serves as a window into
      a 640x200 virtual screen
--------b-1629------------------------------------
INT 16 - HUNTER 16 - GET KEY REPEAT
    AH = 29h
Return: BL = Typematic rate (characters per second) (see #0491)
    BH = delay (00h = 250ms, 01h = 500ms, 02h = 750ms, 03h = 1s)
SeeAlso: AH=03h,AH=2Ah

(Table 0491)
Values for HUNTER 16 Typematic rate:
 00h    30.0     08h    15.0     10h    7.5     18h    3.7
 01h    26.7     09h    13.3     11h    6.7     19h    3.3
 02h    24.0     0Ah    12.0     12h    6.0     1Ah    3.0
 03h    21.8     0Bh    10.9     13h    5.5     1Bh    2.7
 04h    20.0     0Ch    10.0     14h    5.0     1Ch    2.5
 05h    18.5     0Dh     9.2     15h    4.6     1Dh    2.3
 06h    17.1     0Eh     8.6     16h    4.3     1Eh    2.1
 07h    16.0     0Fh     8.0     17h    4.0     1Fh    2.0
SeeAlso: AH=2Ah
--------b-162A------------------------------------
INT 16 - HUNTER 16 - CONTROL KEY REPEAT
    AH = 2Ah
    AL = new state of keyboard autorepeat (00h disabled, 01h enabled)
SeeAlso: AH=03h,AH=26h,AH=29h,AH=2Bh
--------b-162B------------------------------------
INT 16 - HUNTER 16 - REDEFINE KEY SCAN CODES
    AH = 2Bh
    AL = which key table to redefine
        00h unshifted
        01h shifted
        02h Numlock
    BH = standard scan code of key (00h-80h)
    BL = new scan code
Desc:    redefine the generated scan code from BH to BL
SeeAlso: AH=24h,AH=2Ah,AH=2Ch
--------b-162C------------------------------------
INT 16 - HUNTER 16 - REDEFINE RAW KEY CODES
    AH = 2Ch
    AL = Matrix code of key (see AH=29h)
    BL = new key code
Return: AL = status (00h success, nonzero failed)
Desc:    redefine the key code generated by holding the PAW key down and
      pressing the key in AL
SeeAlso: AH=24h,AH=2Bh
--------b-162D------------------------------------
INT 16 - HUNTER 16 - CONTROL BREAK KEYS
    AH = 2Dh
    AL = enabled break keys
        bit 0 Ctrl-C
        bit 1 Ctrl-Break
    BX = 0708h
    CX = 0910h
    DX = 1112h
Return: AL = status (00h success, FFh failed)
SeeAlso: AH=21h"HUNTER"
--------U-163577-----------------------------
INT 16 U - TextWare TWTSR - API
    AX = 3577h
    CX = function
        00CBh ???
        Return: AX = 0000h
            BX = 0000h
            DX:CX -> ???
        00CCh uninstall
        Return: AX = status
                0000h successful
                FFFDh unable to unload because vectors taken
        00CDh ???
        Return: AX = 0000h
            BX = 0000h
            DX:CX -> ???
        other
        Return: AX = 5345h ('SE')
Program: TWTSR is a TSR which allows the TextWare hypertext browser to be
      popped up via hotkey
SeeAlso: AX=D724h
--------U-164252-----------------------------
INT 16 - TEXTCAP 2.0 - INSTALLATION CHECK
    AX = 4252h
Return: AX = 5242h if installed
Program: TEXTCAP 2.0 is a heavily modified (by Gisbert W. Selke) version of
      the PC Magazine utility CAPTURE written by Tom Kihlken
SeeAlso: AX=4253h,AX=4254h
--------U-164253-----------------------------
INT 16 - TEXTCAP 2.0 - UNINSTALL
    AX = 4253h
Return: AX = segment of resident code
Notes:    the uninstall code does not check whether interrupt vectors have been
      chained by other programs
    the caller must free the main memory block (using the returned segment)
SeeAlso: AX=4252h,AX=4254h
--------U-164254-----------------------------
INT 16 - TEXTCAP 2.0 - DUMP TEXT SCREEN TO FILE
    AX = 4254h
Return: AX = status
        4254h if screen dump will be written as soon as disk becomes idle
        5442h if screen dump written
SeeAlso: AX=4252h,AX=4253h
--------e-164500-----------------------------
INT 16 - Shamrock Software EMAIL - GET STATUS
    AX = 4500h
    DL = port number (01h = COM1)
    ES:BX -> 13-byte buffer for ASCIZ name
Return: AX = 4D00h if EMAIL installed on specified port
        ES:BX -> "" if no connection
          -> "*" if connection but caller has not identified name
          -> name otherwise
        CX = version (CH = major, CL = minor)
        DL = privilege level of user (00h = guest)
        DH = chosen language (00h German, 01h English)
SeeAlso: AX=4501h,AX=4502h
--------e-164501-----------------------------
INT 16 - Shamrock Software EMAIL - GET ELAPSED ONLINE TIME AND MAXIMUM TIME
    AX = 4501h
    DL = port number (01h = COM1)
Return: AX = 4D00h if EMAIL installed on specified port
        BX = maximum connect time in clock ticks
        CX = maximum connect time for guests (without name) in clock ticks
        DX = elapsed connect time of current user in clock ticks
SeeAlso: AX=4500h
--------e-164502-----------------------------
INT 16 - Shamrock Software EMAIL - GET CURRENT COMMUNICATIONS PARAMETERS
    AX = 4502h
    DL = port number (01h = COM1)
Return: AX = 4D00h if EMAIL installed on specified port
        BL = current value of serial port's Line Control Register
        BH = flags (see #0492)
        CX = selected country code (33 = France, 49 = Germany, etc)
        DX = baudrate divisor (115200/DX = baudrate)
SeeAlso: AX=4500h

Bitfields for Shamrock Software EMAIL flags:
Bit(s)    Description    (Table 0492)
 0    ISO code
 1    pause
 2    linefeed
 3    ANSI sequences
--------e-164503-----------------------------
INT 16 - Shamrock Software EMAIL - SPECIFY COMMAND-WORD FOR USER FUNCTION
    AX = 4503h
    DL = port number (01h = COM1)
    DH = maximum execution time in clock ticks (00h = 5 seconds)
    ES:BX -> ASCIZ string with new user command-word
Return: AX = 4D00h if EMAIL installed on specified port
Notes:    a single user command (consisting of only uppercase letters and digits)
      may be defined, and remains valid until it is overwritten or the
      EMAIL program terminates; the user command must be activated by
      calling AX=4504h at least once.
    an existing command word may be redefined with this function
SeeAlso: AX=4504h,AX=4505h
--------e-164504-----------------------------
INT 16 - Shamrock Software EMAIL - CHECK FOR USER FUNCTION COMMAND-WORD
    AX = 4504h
    DL = port number (01h = COM1)
    ES:BX -> 80-byte buffer for ASCIZ user input line
Return: AX = 4D00h if EMAIL installed on specified port
        DL = flags
        bit 0: user function supported (always set)
        bit 1: user entered user-function command word
        if DL bit 1 set,
        ES:BX buffer contains line entered by user which begins with
            the defined command word and has been converted to all
            caps
Note:    caller must process the returned commandline and invoke AX=4505h
      within five seconds with the result of that processing
SeeAlso: AX=4503h,AX=4505h
--------e-164505-----------------------------
INT 16 - Shamrock Software EMAIL - SEND RESULT OF USER FUNCTION
    AX = 4505h
    DL = port number (01h = COM1)
    DH = error flag
        bit 3: set on error
    ES:BX -> ASCIZ text to return to user, max 1024 bytes
Return: AH = 4Dh if EMAIL installed on specified port
    AL = status
        00h successful
        02h unable to perform function (timeout, prev call not complete)
        other error
Notes:    if the error flag in DH is set, the string is not sent and an error
      message is generated instead; if this function is not called within
      five seconds of AX=4504h, EMAIL automatically generates an error
      message
    the string is copied into an internal buffer, allowing this function's
      caller to continue immediately
SeeAlso: AX=4503h,AX=4504h,INT 17/AX=2400h
--------e-164506-----------------------------
INT 16 - Shamrock Software EMAIL - MONITOR XMODEM DOWNLOAD
    AX = 4506h
    DL = port number (01h = COM1)
    ES:BX -> 13-byte buffer for ASCIZ filename
Return: AX = 4D00h if EMAIL installed on specified port
        DH = Xmodem status
        00h no XGET command given
        01h XGET in progress
        02h XGET completed successfully
        ES:BX buffer filled with last filename given to XGET command
        (without path)
Note:    DH=02h will only be returned once per XGET; subsequent calls will
      return DH=00h
SeeAlso: AX=4500h,INT 17/AX=2408h
--------K-164B-------------------------------
INT 16 - Frank Klemm Keyboard Driver v2.0 - API
    AH = 4Bh
    CX = code or action
        0000h-FEFFh key code
        FF00h-FFFFh action (see #3514)
    BL = scan code (normal keys) or scan code + 60h (enhanced keys)
    BH = shift state (see #3515)
Return: CX = previous code or action

(Table 3514)
Values for Frank Klemm Keyboard Driver action code:
 FF00h    no action
 FF01h    hardcopy
 FF02h    left shift
 FF03h    right shift
 FF04h    left Ctrl
 FF05h    right Ctrl
 FF06h    left Alt
 FF07h    right Alt / AltGr
 FF08h    CapsLock
 FF09h    NumLock
 FF0Ah    ScrlLock
 FF0Bh    Insert (returns code 5200h or 52E0h)
 FF0Ch    Pause
 FF0Dh    Ctrl-Break function
 FF0Eh    warm boot via far jump to F000h:FFF0h
 FF0Fh    terminate current program
 FF10h    key for entering keys via Alt-numpad (read-only)
 FF11h    clear keyboard buffer
 FF12h    reset (warmboot on XT)
 FF13h    mouse sensitivity (read-only)
 FF14h    keyjobs (read-only)
 FF15h    SysRq
 FF16h    turn on CPU cache (486+)
 FF17h    turn off CPU cache (486+)
SeeAlso: #3515

(Table 3515)
Values for Frank Klemm Keyboard Driver shift state:
 00h    no shift keys
 01h    either Shift
 02h    either Ctrl
 03h    left Alt
 04h    Ctrl + Alt
---standard keyboard---
 05h    right Alt / AltGr
---Russian keyboard---
 05h    Russian + no shift keys
 06h    Russian + either Shift
SeeAlso: #3514
--------K-164D4F-----------------------------
INT 16 - M16_KBD.COM v5.6 - INSTALLATION CHECK
    AX = 4D4Fh
Return: AX = 6F6Dh if installed
        ES = segment of resident code
Program: M16_KBD is a shareware Cyrillic keyboard driver by I.V. Morozov
SeeAlso: INT 10/AX=1130h/BX=4D4Fh
--------J-165000-----------------------------
INT 16 - KEYBOARD - AX PC - SET KEYBOARD COUNTRY CODE
    AX = 5000h
    BX = country code
        0001h USA (English), 0051h Japan
Return: AL = status
        00h successful
        01h bad country code
        02h other error
Notes:    the K3PLUS v6.00+ INT 16 BIOS replacement will switch between the
      supported country specific layout (e.g. BX=0031h Germany, BX=001Fh
      Netherlands, BX=0020h Belgium, BX=0022h Spain) (as with <Ctrl>+
      <Alt>+<F2>) and K3PLUS' transparent mode (as with <Ctrl>+<Alt>+<F1>).
    In transparent mode (BX=0001h), K3PLUS chains to the underlying
      driver (normally the BIOS driver with US-layout). K3PLUS beeps on
      mode changes
SeeAlso: AX=5001h,AX=AF4Dh,INT 10/AX=5000h,INT 17/AX=5000h
--------J-165001-----------------------------
INT 16 - KEYBOARD - AX PC - GET KEYBOARD COUNTRY CODE
    AX = 5001h
Return: AL = status
        00h successful
        BX = country code
        02h error
Note:    also supported by K3PLUS v6.00+
SeeAlso: AX=5000h,INT 10/AX=5001h,INT 17/AX=5001h
--------J-1651-------------------------------
INT 16 - KEYBOARD - AX PC - READ SHIFT KEY STATUS
    AH = 51h
Return: AL = standard shift key states (see #0481,#0486)
    AH = Kana lock (00h off, 01h on)
Note:    also supported by K3PLUS v6.00+, but K3PLUS always returns AH=00h
SeeAlso: AH=02h,AH=12h,AH=22h
--------t-165453BX5242-----------------------
INT 16 - TSRBONES - INSTALLATION CHECK
    AX = 5453h ('TS')
    BX = 5242h ('RB')
    CX = 4F4Eh ('ON')
    DX = 4553h ('ES')
Return: AX = 4553h if installed
    BX = 4F4Eh if installed
    CX = 5242h if installed
    DX = 5453h if installed
Program: TSRBONES is a skeletal TSR framework by Robert Curtis Davis
Note:    these values are the default as the TSRBONES package is distributed,
      but will normally be changed when implementing an actual TSR with
      the TSRBONES skeleton
SeeAlso: INT 2D/AL=00h"AMIS"
--------A-165500-----------------------------
INT 16 C - Microsoft Word internal - MICROSOFT WORD COOPERATION WITH TSR
    AX = 5500h
Return: AX = 4D53h ('MS') if keyboard TSR present
Notes:    during startup, Microsoft Word tries to communicate with any TSRs
      that are present through this call.
    if the return is not 4D53h, Word installs its own INT 09 and INT 16
      handlers; otherwise it assumes that the TSR will handle the keyboard
SeeAlso: AX=55FFh,INT 1A/AX=3601h
--------A-1655FE-----------------------------
INT 16 CU - Microsoft QBASIC internal - MICROSOFT COOPERATION WITH TSR
    AX = 55FEh
    DX = function
        0000h initialize
        ES:BX -> ??? function
        ES:CX -> ??? structure
        FFFFh shutdown/reset
Return: AX = result
        4D4Bh only the INT 1B handler will be installed.
        other: handlers for INT 08, INT 09, INT 16, INT 1B, and INT 1C
          are installed
Notes:    The pointer in ES:CX seems to point at a structure defining a callback
      function when new keyboard keys are pressed. If a TSR returns
      AX=4D4Bh, QBASIC will stop (with IRQ's and interrupts enabled).
    these calls are also made by MS-DOS 6.0's DOSSHELL at startup, exit,
      and before/after shelling out
    since EDIT.COM and HELP.COM merely invoke QBASIC, those two programs
      will also cause this interface to be invoked
    K3PLUS v6.07+ supports this function, but will never invoke the
      callback function
SeeAlso: AX=5500h,AX=AF4Dh,INT 1A/AX=3601h
--------U-1655FF-----------------------------
INT 16 C - Microsoft Word - TSR COOPERATION???
    AX = 55FFh
    BX >= 0004h (version of Microsoft Word [BL = major] ???)
    CX = function
        0000h set ??? flag
        other clear ??? flag
Notes:    hooks intercepting this call are present in SWAPSH and SWAPDT v1.77j,
      distributed with PC Tools v7, as well as the Trusted Access
      SCRNBLNK.COM; this may be part of the standard TesSeRact library
    known to be called by the German edition of Microsoft Word 5.0
SeeAlso: AX=5500h,INT 2F/AX=5453h
--------c-165758BX4858-----------------------
INT 16 U - Netroom CACHECLK - INSTALLATION CHECK
    AX = 5758h
    BX = 4858h ('HX')
    DX = 4443h ('DC')
    CX <> 5758h
Return: BX = 6878h if installed
    CX = 6463h if installed
        AX = code segment of TSR
        CX = internal version??? (v3.00 returns 0100h)
Program: CACHECLK is a "cloaked" disk cache included with Netroom
Notes:    if CX=5758h on entry, CACHECLK returns with all registers unchanged
    the cache statistics are located early in the segment pointed at by
      AX on return
SeeAlso: INT 2F/AX=5758h
--------m-165758BX5754-----------------------
INT 16 U - Netroom ??? - ???
    AX = 5758h
    BX = 5754h
    ???
Return: ???
--------m-165758BX5755-----------------------
INT 16 U - Netroom ??? - ???
    AX = 5758h
    BX = 5755h
    DS:SI -> ???
Return: ???
--------m-165758BX5756-----------------------
INT 16 U - Netroom ??? - INSTALLATION CHECK
    AX = 5758h
    BX = 5756h
Return: BX <> 5756h if installed
--------m-165758BX5858-----------------------
INT 16 U - Netroom PRENET - GET OLD INTERRUPT VECTORS
    AX = 5758h
    BX = 5858h
Return: CF clear
    DX:BX -> saved copy of interrupt vector table
Note:    the installation check consists of calling this function and comparing
      BX against 5858h on return; if it has changed, PRENET is installed
SeeAlso: AX=5758h/BX=5859h
Index:    installation check;Netroom PRENET
--------m-165758BX5859-----------------------
INT 16 U - Netroom POSTNET - GET OLD INTERRUPT VECTORS
    AX = 5758h
    BX = 5859h
Return: CF clear
    DX:BX -> saved copy of interrupt vector table
Note:    the installation check consists of calling this function and comparing
      BX against 5859h on return; if it has changed, POSTNET is installed
SeeAlso: AX=5758h/BX=5858h
Index:    installation check;Netroom POSTNET
--------U-166969BX6968-----------------------
INT 16 - PC Tools v5.1+ BACKTALK - UNHOOK
    AX = 6969h
    BX = 6968h
Return: resident code unhooked, but not removed from memory
Index:    uninstall;BACKTALK
--------U-166969BX6969-----------------------
INT 16 - PC Tools v5.1+ BACKTALK - INSTALLATION CHECK
    AX = 6969h
    BX = 6969h
    DX = 0000h
Return: DX nonzero if installed
        BX = CS of resident code
        DX = PSP segment of resident code
        DS:SI -> ASCIZ identification string "CPoint Talk"
--------i-166A6B-----------------------------
INT 16 U - FastJuice - DISABLE/UNLOAD???
    AX = 6A6Bh
Return: ???
Program: FastJuice is a resident battery-power monitor by SeaSide Software
SeeAlso: AX=7463h
Index:    uninstall;FastJuice
--------G-166C63-----------------------------
INT 16 U - TMED v1.6a - INSTALLATION CHECK
    AX = 6C63h ('lc')
Return: AX = 4C43h ('LC') if installed
Program: TMED is a freeware resident memory editor by Liang Chen
--------U-166D74-----------------------------
INT 16 - MTRTSR - INSTALLATION CHECK
    AX = 6D74h ('mt')
Return: AX = 4D54h ('MT') if installed
Program: MTRTSR is a part of the shareware MTR package by Mechon Mamre which
      permits searching the large corpus of classical Hebrew texts in the
      package
SeeAlso: INT 10/AX=6D74h"MTRFONTS"
--------b-166F00-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_INQUIRE" - Extended BIOS INSTALLATION CHECK
    AX = 6F00h
    BX <> 4850h (usually set to 0000h for simplicity)
Return: BX = 4850h ("HP") if present
Notes:    called by recent MS Mouse drivers looking for an HP-HIL mouse
    supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
SeeAlso: AX=6F01h,AX=6F04h,AX=6F07h,AX=6F09h,AX=6F0Dh,AX=6F11h,AX=6F12h
SeeAlso: INT 14/AX=6F00h,INT 17/AX=6F00h,INT 33/AX=6F00h
SeeAlso: INT 6F/AH=00h"HP Vectra"
--------b-166F01-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_DEF_ATTR" - GET DEFAULT TYPEMATIC VALUES
    AX = 6F01h
Return: AH = 00h (successful)
    CX = 0004h (size of returned buffer)
    ES:SI -> buffer for typematic info (see #0493)
Note:    supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
SeeAlso: AX=6F00h,AX=6F02h,AX=6F03h,AX=6F04h

Format of HP Vectra EX-BIOS typematic info:
Offset    Size    Description    (Table 0493)
 00h    BYTE    delay before repeat for all non-Cursor Control Pad keys
        (see #0494)
 01h    BYTE    typematic rate for all non-Cursor Control Pad keys (see #0495)
 02h    BYTE    delay before repeat for Cursor Control Pad keys    (see #0496)
 03h    BYTE    typematic rate for Cursor Control Pad keys (see #0495)

(Table 0494)
Values for HP Vectra EX-BIOS non-CCP delay time:
 00h    17 ms
 01h    150 ms
 02h    283 ms
 03h    417 ms
 04h    550 ms
 05h    683 ms
 06h    817 ms
 07h    950 ms
 08h    1083 ms
 09h    1217 ms
 0Ah    1350 ms
 0Bh    1483 ms
 0Ch    1617 ms
 0Dh    1750 ms
 0Eh    1883 ms
 0Fh    2017 ms
Note:    the above values assume that the key repeat rate has been set to 60 Hz;
      double the times if set to 30 Hz
SeeAlso: #0493,#0495,#0496

(Table 0495)
Values for HP Vectra EX-BIOS typematic rate:
 00h    60 / sec
 01h    30 / sec
 02h    20
 03h    15
 04h    12
 05h    10
 06h    8.57
 07h    7.5
 08h    6.66
 09h    6 / sec
 0Ah    5.45
 0Bh    5
 0Ch    4.62
 0Dh    4.28
 0Eh    4 / sec
 0Fh    typematic disabled
Note:    the above values assume that the key repeat rate has been set to 60 Hz;
      halve the rates if set to 30 Hz
SeeAlso: #0494,#0496

(Table 0496)
Values for HP Vectra EX-BIOS CCP delay time:
 00h    17 ms
 01h    83 ms
 02h    150 ms
 03h    217 ms
 04h    283 ms
 05h    350 ms
 06h    417 ms
 07h    483 ms
 08h    550 ms
 09h    617 ms
 0Ah    683 ms
 0Bh    750 ms
 0Ch    817 ms
 0Dh    883 ms
 0Eh    950 ms
 0Fh    1017 ms
Note:    the above values assume that the key repeat rate has been set to 60 Hz;
      double the times if set to 30 Hz
SeeAlso: #0494,#0495
--------b-166F02-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_GET_ATTR" - GET CURRENT TYPEMATIC VALUES
    AX = 6F02h
Return: AH = 00h (successful)
    CX = 0004h (size of returned buffer)
    ES:SI -> buffer for typematic info (see #0493)
Note:    supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
SeeAlso: AX=6F00h,AX=6F02h,AX=6F03h,AX=6F04h
SeeAlso: AX=6F00h,AX=6F01h,AX=6F03h
--------b-166F03-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_SET_ATTR" - SET TYPEMATIC VALUES
    AX = 6F03h
    ES:SI -> buffer containing typematic info (see #0493)
Return: AH = 00h (successful)
Note:    supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
SeeAlso: AX=6F00h,AX=6F02h,AX=6F03h,AX=6F04h
SeeAlso: AX=6F00h,AX=6F01h,AX=6F02h
--------b-166F04-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_DEF_MAPPING" - GET DEFAULT KEY MAPPINGS
    AX = 6F04h
    ES:SI -> mapping buffer (see #0497)
Return: AH = 00h (successful)
    CX = 001Eh (number of bytes in buffer)
    ES:SI buffer filled
Notes:    supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
    the HIL input system translates the HIL keyboard events to simulate
      an IBM-compatible keyboard; the translation can be altered
      dynamically by applications
SeeAlso: AX=6F00h,AX=6F05h,AX=6F06h

Format of HP Vectra EX-BIOS keyboard mapping info:
Offset    Size    Description    (Table 0497)
 00h  3 WORDs    entry for V_QWERTY driver (IP, CS, DS)
 06h  3 WORDs    entry for V_SOFTKEY driver (IP, CS, DS)
 0Ch  3 WORDs    entry for V_FUNCTION driver
 12h  3 WORDs    entry for V_NUMPAD driver
 18h  3 WORDs    entry for V_CCP driver
--------b-166F05-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_GET_MAPPING" - GET CURRENT KEY MAPPINGS
    AX = 6F05h
    ES:SI -> mapping buffer (see #0497)
Return: AH = 00h (successful)
    CX = 001Eh (number of bytes in buffer)
    ES:SI buffer filled
Note:    supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
SeeAlso: AX=6F04h,AX=6F06h
--------b-166F06-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_SET_MAPPING" - SET KEY MAPPINGS
    AX = 6F06h
    CX = number of bytes in buffer (001Eh)
    ES:SI -> mapping buffer (see #0497)
Return: AH = 00h (successful)
Notes:    supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
    any application which modifies the key mappings should restore them
      before terminating
    drivers installed with this function are assured of 32 bytes of stack
      space when they are invoked
SeeAlso: AX=6F04h,AX=6F05h,AX=6F07h
--------b-166F07-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_SET_XLATORS" - SET CCP AND SOFTKEY PADS
    AX = 6F07h
    BL = translation to set (see #0498)
Return: AH = 00h (successful)
Notes:    supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
    this function may no longer work properly if the application has
      modified the key mappings with AX=6F06h
SeeAlso: AX=6F06h,AX=6F09h

(Table 0498)
Values for HP Vectra keyboard translation specifier:
 00h    map V_CCP to V_CCPCUR, forcing the cursor pad to return cursor keys
 01h    map V_CCP to V_CCPNUM, forcing the cursor pad to always return numbers
 02h    map V_CCP to V_OFF, disabling the cursor pad
 03h    map V_CCP to V_CCPGID, converting cursor pad keys to GID data
 04h    map V_CCP to V_RAW, passing cursor pad data untranslated to INT 09
 05h    map V_SOFTKEY to V_SKEY2KFEY, translating into standard function keys
 06h    map V_SOFTKEY to V_RAW, passing Softkey scancodes direct to INT 09
 07h    map V_SOFTKEY to V_OFF, disabling HP Softkeys
SeeAlso: #0499

(Table 0499)
Values for HP Vectra scancodes and BIOS keycodes for V_RAW translator:
          INT 09         INT 16 keycode
    Key         scan code    Default     Shifted   Ctrl         Alt
 * (NumPd)    37h    2Ah     (Prt Sc)  00/72h    00/37H
 Sysreq        54h      --     --       --         --
 CCP-Up        60h    00/D9h     00/BFh       00/A5h    00/8BH
 CCP-Left    61h    00/DAh     00/C0h       00/A6h    00/8CH
 CCP-Down    62h    00/DBh     00/C1h       00/A7h    00/8DH
 CCP-Right    63h    00/DCh     00/C2h       00/A8h    00/8EH
 CCP-Home    64h    00/DDh     00/C3h       00/A9h    00/8FH
 CCP-PgUp    65h    00/DEh     00/C4h       00/AAh    00/90H
 CCP-End    66h    00/DFh     00/C5h       00/ABh    00/91H
 CCP-PgDn    67h    00/E0h     00/C6h       00/ACh    00/92H
 CCP-Ins    68h    00/E1h     00/C7h       00/ADh    00/93H
 CCP-Del    69h    00/E2h     00/C8h       00/AEh    00/94H
 CCP-CNTR    6Ah    00/E3h     00/C9h       00/AFh    00/95H
 f1        70h    00/E9h     00/CFh       00/B5h    00/9BH
 f2        71h    00/EAh     00/D0h       00/B6h    00/9CH
 f3        72h    00/EBh     00/D1h       00/B7h    00/9DH
 f4        73h    00/ECh     00/D2h       00/B8h    00/9EH
 f5        74h    00/EDh     00/D3h       00/B9h    00/9FH
 f6        75h    00/EEh     00/D4h       00/BAh    00/A0H
 f7        76h    00/EFh     00/D5h       00/BBh    00/A1H
 f8        77h    00/F0h     00/D6h       00/BCh    00/A2H
Note:    only HP-specific codes are listed in this table; see INT 09 for a full
      list of standard scan codes
SeeAlso: #0005,#0498
--------b-166F08-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_KBD" - GET KEYBOARD INFORMATION
    AX = 6F08h
Return: AH = status
       00h successful
       02h unsupported (non-HIL, i.e. standard, keyboard)
    BH = HP-HIL address (HP Vectra AT only???)
    BL = HP-HIL ID (HP Vectra AT only???)
    BL = keyboard language (ES/QS/RS only???) (see #0500)
Notes:    supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
    the driver's address in the HP_VECTOR_TABLE (see INT 6F/AH=00h) may
      be computed as (BH-1)*6 + N, where N is the address of the first
      HP-HIL device driver (see INT 6F/AH=0Ah"F_INQUIRE_FIRST")
SeeAlso: AX=6F05h,AX=6F09h,INT 6F/AH=0Ah"F_INQUIRE_FIRST"

(Table 0500)
Values for HP HIL keyboard language code:
 00h    reserved
 01h    Arabic-French
 02h    Kanji
 03h    Swiss-French
 04h    Portugese
 05h    Arabic
 06h    Hebrew
 07h    Canadian-English
 08h    Turkish
 09h    Greek
 0Ah    Thai
 0Bh    Italian
 0Ch    Hangul (Korean)
 0Dh    Dutch
 0Eh    Swedish
 0Fh    German
 10h    Chinese (PRC)
 11h    Chinese (Taiwan)
 12h    Swiss (French ii)
 13h    Spanish
 14h    Swiss (German ii)
 15h    Belgian (Flemish)
 16h    Finish
 17h    United Kingdom
 18h    French-Canadian
 19h    French-German
 1Ah    Norwegian
 1Bh    French
 1Ch    Danish
 1Dh    Katakana
 1Eh    Latin American Spanish
 1Fh    United States-American
 20h-FEh reserved
 FFh    non-HP keyboard (IBM AT keyboard and IBM Enhanced keyboard)
--------b-166F09-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_KBD_RESET" - RESET KEYBOARD TO DEFAULTS
    AX = 6F09h
Return: AH = 00h (successful)
Desc:    reset all keyboard mappings to their default translators, and reset
      typematic values to their defaults
Note:    supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
SeeAlso: AX=6F04h,AX=6F07h,AX=6F08h
--------b-166F0A-----------------------------
INT 16 - HP Vectra ES/QS/RS EX-BIOS - READ PROCESSOR SPEED
    AX = 6F0Ah
Return: AH = 00h (successful)
    BX = speed code
        0Bh for low speed (see #0501)
        12h for medium speed (see #0501)
        0Ch for high speed (see #0501)
Note:    supported by ES, QS, and RS series of HP Vectras
SeeAlso: AX=6F00h

(Table 0501)
Values for HP Vetra CPU speed:
    Vectra        Low        Medium    High
    ES        8 MHz         -         8 MHz
    ES/12        8 MHz         -        12 MHz
    QS/16, RS/16    8 MHz         -        16 MHz
    QS/16S        8 MHz         -        16 MHz
    QS/20, RS/20    8 MHz         -        20 MHz
    RS/20C        5 MHz        10 MHz    20 MHz
    RS/25C        5 MHz        12.5 MHz    25 MHz
--------b-166F0B-----------------------------
INT 16 - HP Vectra ES/QS/RS EX-BIOS - SET PROCESSOR SPEED TO LOW
    AX = 6F0Bh
Return: AH = 00h (successful)
Notes:    see AX=6F0Ah for speed definitions
    supported by ES, QS, and RS series of HP Vectras
SeeAlso: AX=6F00h,AX=6F0Ah
--------b-166F0C-----------------------------
INT 16 - HP Vectra ES/QS/RS EX-BIOS - SET PROCESSOR SPEED TO HIGH
    AX = 6F0Ch
Return: AH = 00h (successful)
Notes:    see AX=6F0Ah for speed definitions
    supported by ES, QS, and RS series of HP Vectras
SeeAlso: AX=6F00h,AX=6F0Ah
--------b-166F0D-----------------------------
INT 16 - HP Vectra ES/QS/RS EX-BIOS - GET HIL Extended BIOS INTERRUPT NUMBER
    AX = 6F0Dh
Return: AH = interrupt number (default 6Fh, 02h means 6Fh as well)
Notes:    supported by ES, QS, and RS series of HP Vectras
    called by MS Windows HPSYSTEM.DRV and HPEBIOS.386 to support the HP-HIL
      input system
SeeAlso: AX=6F00h,AX=6F0Eh,INT 6F/AH=00h"HP Vectra",INT 6F/AH=0Ah"HP"
--------b-166F0E-----------------------------
INT 16 - HP Vectra ES/QS/RS EX-BIOS - SET HIL Extended BIOS INTERRUPT NUMBER
    AX = 6F0Eh
    BL = new interrupt number (60h-6Fh,78h-7Fh)
Return: AH = status (00h = successful)
Desc:    allows the HIL Extended BIOS software to use a non-default interrupt
      number in case of an interrupt conflict with another application
Notes:    supported by ES, QS, and RS series of HP Vectras
    called by MS Windows HPSYSTEM.DRV and HPEBIOS.386 to support the HP-HIL
      input system
SeeAlso: AX=6F00h,AX=6F0Dh,INT 6F/AH=00h"HP",INT 6F/AH=0Ah"HP"
--------b-166F0F-----------------------------
INT 16 - HP Vectras RS/20C and RS/25C - ENABLE MEMORY CACHING
    AX = 6F0Fh
Return: AH = status
        00h successful
        FEh cache subsystem is bad
SeeAlso: AX=6F00h,AX=6F10h,AX=6F11h
--------b-166F10-----------------------------
INT 16 - HP Vectras RS/20C and RS/25C - DISABLE MEMORY CACHING
    AX = 6F10h
Return: AH = 00h (successful)
SeeAlso: AX=6F00h,AX=6F0Fh,AX=6F11h
--------b-166F11-----------------------------
INT 16 - HP Vectras RS/20C and RS/25C - GET MEMORY CACHING STATE
    AX = 6F11h
Return: AH = 00h (successful)
    AL bit 0 = cache state
        0 cache disabled
        1 cache enabled
SeeAlso: AX=6F00h,AX=6F0Fh,AX=6F10h
--------b-166F12-----------------------------
INT 16 - HP Vectras RS/20C and RS/25C - SET PROCESSOR SPEED TO MEDIUM
    AX = 6F12h
Return: AH = 00h (successful)
Note:    see AX=6F0Ah for speed definitions
SeeAlso: AX=6F00h,AX=6F0Ah
--------K-1670-------------------------------
INT 16 - FAKEY.COM - INSTALLATION CHECK
    AH = 70h
Return: AX = 1954h if installed
Program: FAKEY is a keystroke faking utility by System Enhancement Associates
--------K-1671-------------------------------
INT 16 - FAKEY.COM - PUSH KEYSTROKES
    AH = 71h
    CX = number of keystrokes
    DS:SI -> array of words containing keystrokes to be returned by AH=00h
Program: FAKEY is a keystroke faking utility by System Enhancement Associates
SeeAlso: AH=05h,AH=72h
--------K-1672-------------------------------
INT 16 - FAKEY.COM - CLEAR FAKED KEYSTROKES
    AH = 72h
Program: FAKEY is a keystroke faking utility by System Enhancement Associates
SeeAlso: AH=71h
--------K-1673-------------------------------
INT 16 - FAKEY.COM - PLAY TONES
    AH = 73h
    CX = number of tones to play
    DS:SI -> array of tones (see #0502)
Program: FAKEY is a keystroke faking utility by System Enhancement Associates
SeeAlso: INT 15/AX=1019h

Format of FAKEY.COM tone array entries:
Offset    Size    Description    (Table 0502)
 00h    WORD    divisor for timer channel 2
 02h    WORD    duration in clock ticks
--------i-167463-----------------------------
INT 16 U - FastJuice - INSTALLATION CHECK
    AX = 7463h ("tc")
Return: AX = 5443h ("TC") if installed
Program: FastJuice is a resident battery-power monitor by SeaSide Software
SeeAlso: AX=6A6Bh
--------R-1675-------------------------------
INT 16 - pcANYWHERE III - SET TICK COUNT FOR SCANNING
    AH = 75h
    AL = number of ticks between checks for new screen changes
--------R-1676-------------------------------
INT 16 - pcANYWHERE III - SET ERROR CHECKING TYPE
    AH = 76h
    AL = error checking type
        00h none
        01h fast
        02h slow
--------R-1677-------------------------------
INT 16 - pcANYWHERE III - LOG OFF
    AH = 77h
    AL = mode
        00h wait for another call
        01h leave in Memory Resident Mode
        02h leave in Automatic Mode
        FFh leave in current operating mode
--------U-167761-----------------------------
INT 16 - WATCH.COM v2.x-v3.0 - INSTALLATION CHECK
    AX = 7761h ('wa')
Return: AX = 5741h ('WA') if installed
Note:    WATCH.COM is part of the "TSR" package by Kim Kokkonen
SeeAlso: INT 21/AX=7761h
--------U-167788BX7789-----------------------
INT 16 - PC Magazine PUSHDIR.COM - INSTALLATION CHECK
    AX = 7788h
    BX = 7789h
    DS:SI -> signature "PUSHDIR VERSION 1.0"
Return: AX = 7789h if installed and signature correct
    BX = 7788h
    SI destroyed
--------R-1679-------------------------------
INT 16 - pcANYWHERE III - CHECK STATUS
    AH = 79h
Return: AX = status
        FFFFh if resident and active
        FFFEh if resident but not active
        FFFDh if in Memory Resident mode
        FFFCh if in Automatic mode
        other value if not resident
SeeAlso: AX=7B00h,INT 21/AX=2B44h
--------R-167A-------------------------------
INT 16 - pcANYWHERE III - CANCEL SESSION
    AH = 7Ah
--------R-167B00-----------------------------
INT 16 - pcANYWHERE III - SUSPEND
    AX = 7B00h
SeeAlso: AH=79h,AX=7B01h
--------R-167B01-----------------------------
INT 16 - pcANYWHERE III - RESUME
    AX = 7B01h
SeeAlso: AH=79h,AX=7B00h
--------R-167C-------------------------------
INT 16 - pcANYWHERE III - GET PORT CONFIGURATION
    AH = 7Ch
Return: AH = port number
    AL = baud rate (see #0503)
SeeAlso: AX=7B00h,AH=7Eh

(Table 0503)
Values for pcANYWHERE III baud rate:
 00h    50 baud
 01h    75 baud
 02h    110 baud
 03h    134.5 baud
 04h    150 baud
 05h    300 baud
 06h    600 baud
 07h    1200 baud
 08h    1800 baud
 09h    2000 baud
 0Ah    2400 baud
 0Bh    4800 baud
 0Ch    7200 baud
 0Dh    9600 baud
 0Eh    19200 baud
SeeAlso: #0213
--------R-167D-------------------------------
INT 16 - pcANYWHERE III - GET/SET TERMINAL PARAMETERS
    AH = 7Dh
    AL = subfunction
        00h set terminal parameters
        01h get terminal parameters
        02h get configuration header and terminal parameters
    DS:CX -> terminal parameter block
SeeAlso: AH=7Ch,AH=7Eh
--------R-167E-------------------------------
INT 16 - pcANYWHERE III - COMMUNICATIONS I/O THROUGH PORT
    AH = 7Eh
    AL = subfunction
        01h port input status
        Return AX = 0 if no characer ready,
               AX = 1 if character ready
        02h port input character
        Return AL = received character
        03h port output character in CX
        11h hang up phone
SeeAlso: AH=7Ch
--------R-167F-------------------------------
INT 16 - pcANYWHERE III - SET KEYBOARD/SCREEN MODE
    AH = 7Fh
    AL = subfunction
        00h enable remote keyboard only
        01h enable host keyboard only
        02h enable both keyboards
        08h display top 24 lines
        09h display bottom 24 lines
        10h Hayes modem
        11h other modem
        12h direct connect
--------U-1680-------------------------------
INT 16 - MAKEY.COM - INSTALLATION CHECK
    AH = 80h
Return: AX = 1954h if installed
Program: MAKEY is a utility by System Enhancement Associates
--------K-1687-------------------------------
INT 16 - DK.COM v1.03 - INSTALLATION CHECK
    AH = 87h
Return: AX = 4A57h ('JW') if installed
Program: DK.COM is the resident part of a small keyboard macro utility
      by Digital Mechanics.
--------U-168765BX4321-----------------------
INT 16 - AT.COM version 8/26/87 - API
    AX = 8765h
    BX = 4321h
    CX = ??? or FFFFh
    if CX = FFFFh
        DX = number of event to remove or FFFFh
Return: ES:BX -> event record array (see #0504)
Program: AT.COM is a resident scheduler by Bill Frolik

Format of AT.COM event record:
Offset    Size    Description    (Table 0504)
 00h    BYTE    in-use flag (00h free, 01h in use, FFh end of array)
 01h    BYTE    day of date on which to trigger
 02h    BYTE    month of date on which to trigger
 03h    BYTE    trigger time, minute
 04h    BYTE    trigger time, hour
 05h    WORD    offset of command to be executed
--------K-1692-------------------------------
INT 16 - KEYB.COM KEYBOARD CAPABILITIES CHECK (not an actual function!)
    AH = 92h
Return: AH <= 80h if enhanced keyboard functions (AH=10h-12h) supported
Desc:    this function is called by the DOS 3.2 KEYBxx.COM and DOS 5+ KEYB.COM
      to determine the highest supported keyboard function
Note:    many BIOSes (including at least some versions of Phoenix and AMI) will
      destroy AH on return from functions higher than AH=12h, returning
      12h less than was in AH on entry (due to a chain of DEC/JZ
      instructions)
SeeAlso: AH=05h"PCjr",AH=A2h,INT 2F/AX=AD80h
--------U-1699-------------------------------
INT 16 - SCOUT v5.4 - GET ???
    AH = 99h
Return: AX = ABCDh
    BX:CX -> ??? (appears to be start of PSP for resident portion)
Program: Scout is a memory-resident file manager by New-Ware
SeeAlso: AH=9Eh
--------U-169E-------------------------------
INT 16 - SCOUT v5.4 - INSTALLATION CHECK
    AH = 9Eh
Return: AX = ABCDh if installed
Program: Scout is a memory-resident file manager by New-Ware
SeeAlso: AH=99h
--------K-16A2-------------------------------
INT 16 - KEYB.COM KEYBOARD CAPABILITIES CHECK (not an actual function!)
    AH = A2h
Return: AH <= 80h if 122-key keyboard functions (AH=20h-22h) supported
Desc:    this function is called by the DOS 3.2 KEYBxx.COM and DOS 5+ KEYB.COM
      to determine the highest supported keyboard function
Note:    many BIOSes (including at least some versions of Phoenix and AMI) will
      destroy AH on return from functions higher than AH=12h, returning
      12h less than was in AH on entry (due to a chain of DEC/JZ
      instructions)
SeeAlso: AH=05h"PCjr",AH=92h,INT 2F/AX=AD80h
--------V-16AA-------------------------------
INT 16 - PTxxx.COM - (xxx=CGA,EGA,VGA,HER...) CALL GATE FOR GRAPHICS
    AH = AAh
    Various registers set up by high level language.
Return: Graphics performed
Note:    PT stands for Paint Tools which is a graphics library for Turbo Pascal,
      Modula 2 and others from DataBiten in Sweden. The library is
      installed as a memory resident driver.
--------U-16AABBBXEEFF-----------------------
INT 16 U - JORJ v4.3 - INSTALLATION CHECK
    AX = AABBh
    BX = EEFFh
Return: AX = EEFFh if installed
    BX = AABBh if installed
        CL = hotkey name (default 6Ah 'j' for Alt-J)
Program: JORJ is a shareware dictionary with phonetic lookup by Jorj Software
      Co.
Index:    hotkeys;JORJ
--------K-16AF20BX4B33-----------------------
INT 16 - K3PLUS v6.00+ (API v2.0+) - GET EXTENDED BUFFER STATE
    AX = AF20h
    BX = 4B33h ('K3')
Return: AX = K3 version (same as returned in BX by AX=AF4Dh)
    ES:BX -> extended keyboard buffer start
    ES:DX -> extended keyboard buffer end
    ES:SI -> next keystroke
    ES:DI -> last keystroke in buffer
    CX = number of keystrokes in buffer
Program: K3PLUS is an extended keyboard driver by Matthias Paul and Axel C.
      Frinke, originally based on the K3 extended German keyboard driver
      by Martin Gerdes published in c't magazine in 1988
Note:    this function replaces the identical function AH=20h"K3"
SeeAlso: AH=20h"K3",AX=AF25h,AX=AF4Dh,AX=AF50h,INT 2F/AX=ED58h
--------K-16AF25BX4B33-----------------------
INT 16 - K3PLUS v6.00+ (API v2.0+) - COPY INTO EXTENDED BUFFER
    AX = AF25h
    BX = 4B33h ('K3')
    CX = number of keystrokes to copy
    ES:SI -> buffer containing keystrokes
Return: CF clear if successful
    CF set on error (i.e. buffer full)
        CX = number of keystrokes NOT transferred
        ES:SI -> first keystroke not transferred
Note:    this function replaces the identical function AH=25h"K3"
SeeAlso: AH=25h"K3",AX=AF20h,AX=AF4Dh,AX=AF50h,INT 2F/AX=D44Fh/BX=0001h
--------K-16AF4DBX4B33-----------------------
INT 16 - K3PLUS v6.00+ (API v2.0+) - GET VERSION INFORMATION
    AX = AF4Dh
    BX = 4B33h ('K3')
Return: AL = 50h if installed
        BX = K3 version
        DX = API version
        ES:CX -> K3 structure (version-dependent) (see #0505)
Program: K3PLUS is an extended keyboard driver by Matthias Paul and Axel C.
      Frinke, originally based on the K3 extended German keyboard driver
      by Martin Gerdes published in c't magazine in 1988
SeeAlso: AX=AF20h,AX=AF50h,AX=AF80h,AX=AF82h/BX=4B33h,INT 2F/AX=D44Fh/BX=0000h
SeeAlso: INT 2F/AX=ED58h
Index:    installation check;K3PLUS

Format of internal K3 structure:
Offset    Size    Description    (Table 0505)
 00h  3 BYTEs    signature "K3$"
 03h    BYTE    length of structure, including this byte and signature
 04h    WORD    compiler switch option flags A (see #0506)
 06h    WORD    compiler switch option flags B (see #0507)
 08h    BYTE    internal flags A (see #0508)
 09h    BYTE    internal flags B (see #0509)
 0Ah    WORD    DOS version recorded at startup
 0Ch    WORD    "ActTypeSpeed"
 0Eh    WORD    last Keyboard-ID sent
        41ABh translated, 83ABh native (pass-through)
 10h    WORD    offset of K3TAB Special
 12h    WORD    offset of K3TAB German
 14h    WORD    offset of K3TAB Alt
 16h    WORD    offset of K3TAB AltGr
 18h    WORD    offset of K3TAB Ctrl
 1Ah    WORD    offset of K3TAB NPad
 1Ch    WORD    offset of K3TAB CtrlNPad
 1Eh    WORD    offset of K3TAB AltNPad
 20h    WORD    offset of K3TAB ApoTbl or 0000h
 22h    WORD    offset of K3TAB UmlautTbl or 0000h
 24h    WORD    offset of K3TAB UmlautTblExp or 0000h
 26h    WORD    length of video mode table
 28h    WORD    offset of VidMdTbl or 0000h
 2Ah    BYTE    '$' end marker

Bitfields for K3PLUS compiler switch option flags A:
Bit(s)    Description    (Table 0506)
 15    GuINT16Fct2 (general use of INT 16 function 2)
 14    Int15df (INT 15 has to be predefined)
 13    GuAltNP (general use of Alt Numpad)
 12    SupAT (ATs+ supported)
 11    GuINT16Fct3 (general use of INT 16 function 3)
 10    GuINT16Ret (general use of INT16 bad function return)
 9-8    Layout (0-2, 3 reserved; 0=PC, 1=AT, 2=MF)
 7    ForceMF (force MF decode without read-ID)
 6    KXlate (translate keys for special keyboard)
 5    UmlautX (umlaut translation capability included)
 4    ApoX (translate apostrophe)
 3    DoINT16 (INT 16 handler included)
 2    UseCC (CopyCursor included)
 1-0    UseEB
    0=no extended keystroke buffer, 1=reserve mem, 2=use PSP, 3=reserved

Bitfields for K3 compiler switch option flags B:
Bit(s)    Description    (Table 0507)
 15-11    reserved (0)
 10    CtrlSeq (Ctrl macro capability included)
 9-8    SupINT16fct55FE
 6    DoInstallCheck (check for double installation)
 5    SupINT16fct5PcJr (INT 16/AH=05h"PCjr" supported)
 4    SendOut (sound and message output supported)
 3    SupInt16fct5500 (INT 16/AX=5500h supported)
 2    GuINT15Fct4F (calls to INT 15/AH=4Fh supported)
 1-0    UseBufferStart (0=use standard area, 1=set standard area,
    2=use internal indexes, 3=reserved)

Bitfields for K3 internal flags A:
Bit(s)    Description    (Table 0508)
 7    DoingUmlautExp
 6    CallINT15fct4F
 5    Beep1 (requires SendOut set in option flags B)
 4    ATflag (set for AT, 386, PS/2 Models 50-80)
 3    XTflag (set for PC, PC/XT, Micromint PC, Pencock PC, PS/2 Model 30)
 2    KeyClick
 1    UmlautExp
 0    UmlautTrans

Bitfields for K3 internal flags B:
Bit(s)    Description    (Table 0509)
 7-5    reserved
 4    TranslateE0 enabled
 3    Boot enabled
 2    PrintScreen enabled
 1    Break enabled
 0    ApoPendingBeep
--------K-16AF50BX4B33-----------------------
INT 16 - K3PLUS v6.00+ (API v2.0+) - CHECK IF FUNCTION SUPPORTED
    AX = AF50h
    BX = 4B33h ('K3')
    CH = function
        00h get function flags
        CL = 00h
        Return: CX = supported function flags (see #0510)
        nonzero reserved for extensions
SeeAlso: AX=AF20h,AX=AF4Dh,AX=AF51h,AX=AF80h

Bitfields for K3PLUS supported function list:
Bit(s)    Description    (Table 0510)
 0    function 4Dh supported
 1    function 50h supported
 2-3    reserved (0)
 4    function 20h supported
 5    function 25h supported
 6    function 51h supported
 7    reserved (0)
 8    function 80h supported
 9    function 81h supported
 10    function 82h supported
 11-15    reserved (0)
--------K-16AF51BX4B33-----------------------
INT 16 - K3PLUS v6.00+ (API v2.00+) - SET OPTIONS
    AX = AF51h
    BX = 4B33h ('K3')
    CX = switches
Return: AL = status
        00h done
        CX = previous switch settings
        01h switch not supported
        FFh other error
SeeAlso: AX=AF4Dh,AX=AF50h,AX=AF80h
--------K-16AF80BX4B33-----------------------
INT 16 - K3PLUS v6.00+ (API v2.00+) - GET ORIGINAL INT 09h VECTOR
    AX = AF80h
    BX = 4B33h ('K3')
Return: AL = status
        00h not supported
        81h if successful
        ES:CX -> original INT 09 handler
SeeAlso: AX=AF4Dh,AX=AF50h,AX=AF81h,AX=AF82h
--------K-16AF81BX4B33-----------------------
INT 16 - K3PLUS v6.00+ (API v2.00+) - GET ORIGINAL INT 16h HANDLER
    AX = AF81h
    BX = 4B33h ('K3')
Return: AL = status
        00h not supported
        82h if successful
        ES:CX -> original INT 16 handler
SeeAlso: AX=AF4Dh,AX=AF50h,AX=AF80h,AX=AF82h
--------K-16AF82BX4B33-----------------------
INT 16 - K3PLUS v6.00+ (API v2.00+) - GET ORIGINAL INT 10h HANDLER
    AX = AF82h
    BX = 4B33h ('K3')
Return: AL = status
        00h not supported
        83h if successful
        ES:CX -> original INT 10 handler
Program: K3PLUS is an extended keyboard driver by Matthias Paul and Axel C.
      Frinke, originally based on the K3 extended German keyboard driver
      by Martin Gerdes published in c't magazine in 1988
SeeAlso: AX=AF4Dh,AX=AF50h,AX=AF80h,AX=AF81h,INT 2F/AX=ED58h
--------m-16B0B1-----------------------------
INT 16 - VGARAM v1.00 - INSTALLATION CHECK
    AX = B0B1h
    ES:DI -> 6 byte signature "VGARAM"
Return: AX = B1B0h if installed,
    DS:BX -> VGARAM Status byte: 0 = OFF, 1 = ON
Program: VGARAM is a utility by Brett Warthen which makes VGA memory which is
      not used in text modes available for DOS
--------K-16CA--BX736B-----------------------
INT 16 - CtrlAlt Associates STACKEY.COM v3.00 - API
    AH = CAh
    BX = 736Bh ("sk")
    CX = 736Bh
    AL = function
        00h installation check
        Return: DX = words available in keyboard buffer
        01h place keystroke in buffer
        DX = keystroke (DH = scan code, DL = ASCII character)
        Return: DX = words available in keyboard buffer
                FFFFh on error
        02h flush STACKEY and BIOS keyboard buffers
Return: AX = CAFFh if installed
        BX = segment of resident code
        CX = STACKEY version (CH = major, CL = minor)
Program: STACKEY is a shareware keyboard-input faking TSR
Index:    installation check;STACKEY
--------V-16CA00BX6570-----------------------
INT 16 - CtrlAlt Associates EGAPAL.COM v1.00 - INSTALLATION CHECK
    AX = CA00h
    BX = 6570h ("ep")
    CX = 6570h
Return: AX = CAFFh if installed
        BX = segment of resident code
        CX = ??? (0090h)
Program: EGAPAL is a TSR supplied with STACKEY which makes EGA palette
      settings permanent across mode switches
SeeAlso: AX=CA00h/BX=7670h
--------V-16CA00BX7670-----------------------
INT 16 - CtrlAlt Associates VGAPAL.COM v1.00 - INSTALLATION CHECK
    AX = CA00h
    BX = 7670h ("vp")
    CX = 7670h
Return: AX = CAFFh if installed
        BX = segment of resident code
        CX = ??? (0090h)
Program: VGAPAL is a TSR supplied with STACKEY which makes VGA palette
      settings permanent across mode switches
SeeAlso: AX=CA00h/BX=6570h
--------U-16CB00-----------------------------
INT 16 - PUPClip v1.12+ - INSTALLATION CHECK
    AX = CB00h
Return: BX = 4342h if installed
        AX = version (AH = major version, AL = BCD minor version)
Program: PUPClip is the freeware PopUP Clipboard for DOS and Windows DOS
     sessions by SkullC0DEr
SeeAlso: AX=CB01h,AX=CB02h,AX=CB03h,AX=CB04h,AX=CB05h,AX=CB06h,AX=CB08h
SeeAlso: INT 2F/AX=1701h
--------U-16CB01-----------------------------
INT 16 - PUPClip v1.12+ - GET CLIPBOARD CURSOR POSITION
    AX = CB01h
Return: BL = column (0-79)
    BH = row (0-49)
SeeAlso: AX=CB00h,AX=CB02h,AX=CB03h
--------U-16CB02-----------------------------
INT 16 - PUPClip v1.12+ - SET CLIPBOARD CURSOR POSITION
    AX = CB02h
    BL = column (0-79)
    BH = row (0-49)
Return: CF clear if successful
    CF set on error (invalid position)
SeeAlso: AX=CB00h,AX=CB01h,AX=CB04h
--------U-16CB03-----------------------------
INT 16 - PUPClip v1.12+ - GET CHARACTER FROM CURRENT CLIPBOARD CURSOR POSITION
    AX = CB03h
Return: BL = ASCII character at current position
SeeAlso: AX=CB00h,AX=CB02h,AX=CB04h,INT 2F/AX=1705h
--------U-16CB04-----------------------------
INT 16 - PUPClip v1.12+ - WRITE CHARACTER TO CURRENT CLIPBOARD CURSOR POSITION
    AX = CB04h
    BL = ASCII character to store
SeeAlso: AX=CB00h,AX=CB02h,AX=CB03h,AX=CB05h,INT 2F/AX=1703h
--------U-16CB05-----------------------------
INT 16 - PUPClip v1.12+ - CLEAR CLIPBOARD CONTENTS
    AX = CB05h
Return: nothing
SeeAlso: AX=CB00h,AX=CB04h,AX=CB06h,AX=CB07h,INT 2F/AX=1702h
--------U-16CB06-----------------------------
INT 16 - PUPClip v1.12+ - SCROLL UP CLIPBOARD CONTENTS
    AX = CB06h
Return: nothing
SeeAlso: AX=CB00h,AX=CB05h,AX=CB07h
--------U-16CB07-----------------------------
INT 16 - PUPClip v1.12+ - SCROLL DOWN CLIPBOARD CONTENTS
    AX = CB07h
Return: nothing
SeeAlso: AX=CB00h,AX=CB05h,AX=CB06h
--------U-16CB08-----------------------------
INT 16 - PUPClip v1.12+ - POP UP
    AX = CB08h
Return: CF clear if successful
    CF set on error (unsupported video mode)
SeeAlso: AX=CB00h
--------U-16D724CX00CB-----------------------
INT 16 U - APCAL v3.20 - GET ???
    AX = D724h
    CX = 00CBh
Return: AX = 0000h
    BX = 0000h
    DX:CX -> ??? or 0000h:0000h
Program: APCAL is an optionally-resident shareware appointment calendar by
      Gamma Software
SeeAlso: AX=3577h,AX=D724h/CX=00CCh,AX=D724h/CX=00CDh
--------U-16D724CX00CC-----------------------
INT 16 U - APCAL v3.20 - GET ???
    AX = D724h
    CX = 00CCh
Return: AX = 0000h
    BX = 0000h
    DX:CX -> ??? (apparently an internal data area)
SeeAlso: AX=D724h/CX=00CBh,AX=D724h/CX=00CDh
--------U-16D724CX00CD-----------------------
INT 16 U - APCAL v3.20 - GET ???
    AX = D724h
    CX = 00CDh
Return: AX = ??? (5345h seen)
SeeAlso: AX=D724h/CX=00CBh,AX=D724h/CX=00CCh
--------v-16DD--------------------------
INT 16 - VIRUS - "Frumble" - INSTALLATION CHECK
    AH = DDh
Return: AL = DDh if resident
SeeAlso: INT 13/AX=FD50h,INT 21/AX=010Fh,INT 21/AX=0B56h
--------s-16DFDF-----------------------------
INT 16 U - Corel PowerSCSI - FDAUDIO.COM - INSTALLATION CHECK
    AX = DFDFh
Return: ES:DI -> ASCII signature "FDAUDIO/CD" followed by ASCII date, i.e.
      "06/18/93" if installed
--------b-16E000-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - GET VERSION NUMBER
    AX = E000h
Return: CF clear if successful
        AL = FAh
        BX = version number (BCD) (0200h = v2.00)
    CF set on error (not implemented)
Notes:    this interface is available on AMI BIOSes built from AMI core version
      8/8/93 (HiFlex BIOS) or 11/15/93 (WinBIOS) or later
    the "Meningitis" virus uses this API when attacking a system equipped
      with an AMI BIOS; it is supposedly able to write itself into the
      Flash ROM and thus make itself part of the BIOS
SeeAlso: AX=E001h,AX=E004h,AX=E006h,AX=E008h,AX=E00Ah,AX=E00Bh,AX=E0FFh
--------b-16E001-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - GET CHIPSET SAVE/RESTORE SIZE
    AX = E001h
Return: CF clear if successful
        AL = FAh
        BX = number of bytes required to save chipset configuration
    CF set on error
SeeAlso: AX=E000h,AX=E002h,AX=E003h
--------b-16E002-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - SAVE CHIPSET STATUS & PREPARE CHPSET
    AX = E002h
    ES:DI -> buffer for storing chipset status
Return: CF clear if successful
        AL = FAh
    CF set on error
SeeAlso: AX=E000h,AX=E001h,AX=E003h
--------b-16E003-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface -  RESTORE CHIPSET STATUS
    AX = E003h
    ES:DI -> buffer in which chipset status was previously stored
Return: CF clear if successful
        AL = FAh
    CF set on error
SeeAlso: AX=E000h,AX=E001h,AX=E002h
--------b-16E004-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - LOWER PROGRAMMING VOLTAGE Vpp
    AX = E004h
Return: CF clear if successful
        AL = FAh
    CF set on error
Note:    this function does not return until the voltage level stabilizes
SeeAlso: AX=E000h,AX=E005h,AX=E006h
--------b-16E005-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - RAISE PROGRAMMING VOLTAGE Vpp
    AX = E005h
Return: CF clear if successful
        AL = FAh
    CF set on error
Note:    this function does not return until the voltage level stabilizes
SeeAlso: AX=E000h,AX=E004h,AX=E007h
--------b-16E006-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - FLASH WRITE PROTECT
    AX = E006h
Return: CF clear if successful
        AL = FAh
    CF set on error
Note:    this function performs any delay required to allow the Flash ROM to
      stabilize in the write-protected state
SeeAlso: AX=E000h,AX=E004h,AX=E007h
--------b-16E007-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - FLASH WRITE ENABLE
    AX = E007h
Return: CF clear if successful
        AL = FAh
    CF set on error
Note:    this function performs any delay required to allow the Flash ROM to
      stabilize in the write-enabled state
SeeAlso: AX=E000h,AX=E005h,AX=E006h,AX=E008h
--------b-16E008-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - FLASH SELECT
    AX = E008h
Return: CF clear if successful
        AL = FAh
    CF set on error
Desc:    select the Flash ROM if the system contains both EPROM and Flash ROM
Note:    this function performs any delay required to allow the Flash ROM to
      stabilize in the selected state; if no EPROM is present, this
      function always returns successfully
SeeAlso: AX=E000h,AX=E007h,AX=E009h
--------b-16E009-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - FLASH DE-SELECT
    AX = E009h
Return: CF clear if successful
        AL = FAh
    CF set on error
Desc:    select the EPROM if the system contains both EPROM and Flash ROM
Note:    this function performs any delay required to allow the Flash ROM to
      stabilize in the de-selected state; if no EPROM is present, this
      function always returns successfully
SeeAlso: AX=E000h,AX=E006h,AX=E008h
--------b-16E00A-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - VERIFY ALLOCATED MEMORY
    AX = E00Ah
    BX = number of paragraphs
    ES = starting segment of memory
Return: CF clear if successful
        AL = FAh
    CF set on error
Desc:    determine whether the specified memory may be used for flash
      programming
Note:    always returns error if BX is zero on entry
SeeAlso: AX=E000h,AX=E00Bh
--------b-16E00B-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - SAVE INTERNAL CACHE STATUS
    AX = E00Bh
    ES:DI -> buffer for internal cache status (minimum 4Kbytes)
Return: CF clear if successful
        AL = FAh
    CF set on error
Note:    always returns error if the hardware does not contain internal
      cache or this call is made in protected mode
SeeAlso: AX=E000h,AX=E00Ah,AX=E00Ch
--------b-16E00C-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - RESTORE INTERNAL CACHE STATUS
    AX = E00Ch
    ES:DI -> buffer containing internal cache status (minimum 4Kbytes)
Return: CF clear if successful
        AL = FAh
    CF set on error
Note:    always returns error if the hardware does not contain internal
      cache or this call is made in protected mode
SeeAlso: AX=E000h,AX=E00Bh
--------t-16E0E0-----------------------------
INT 16 - TurboPower TSRs - ALTERNATE INSTALLATION CHECK
    AX = E0E0h
Return: AX = 1F1Fh if installed
        DWORD 0040h:00F0h -> last data block in TSR list (see #0512)
Note:    the returned TSR list provides support for communication among TSRs
      built with TurboPower's Turbo Professional and Object Professional
      libraries for Turbo Pascal
SeeAlso: AX=F0F0h
--------b-16E0FF-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - GENERATE CPU RESET
    AX = E0FFh
Return: never
SeeAlso: AX=E000h,INT 14/AH=17h"FOSSIL"
--------U-16ED--BHED-------------------------
INT 16 - BORLAND TURBO LIGHTNING - API
    AH = EDh
    BH = EDh
    BL = function
        00h installation check
        Return: AX = 5205h
            CH = major version
            CL = minor version
        01h identical to function 00h???
        02h get resident data segment
        Return: AX = data segment of resident portion
        03h get resident ???
        Return: AX = offset of some buffer in resident code seg
        04h redefine auxiliary dictionary
        DS:SI -> counted filename string
        Return: AL = result code
        05h select active environment
        AL = environment (00h to 0Ch)
        Return: AX = status
                0000h if OK
                0001h if out of range
        06h toggle AutoProof???
        AL = state (00h off, 01h on)
        07h ???
        08h ???
        AL = char???
        CX = ???
        DX = ???
        Return: AX = 0, 1 or 2
        09h ???
        0Ah ???
        CX = ???
        DX = ???
        Return: AX = ???
        0Bh check dictionary integrity???
        DS:SI -> counted dictionary filename string
        Return: AX = 0, 40h, 80h
        0Ch spellcheck string (disk dictionary, possibly RAM dict as well)
        DS:SI -> counted string to check
        Return: AH = 0
            AL = result code
               00h string found in dictionary
               20h string begins more than one word
               40h string not found
        0Dh set ???
        (sets an internal flag)
        0Eh spellcheck string (RAM dictionary only)
        DS:SI -> counted string to check
        Return: AH = 00h
            AL = result code
                00h string found in dictionary
                01h string not found
                02h ???
        0Fh ???
        10h ???
Notes:    AX in general returns an error code from most functions.
Index:    installation check;Turbo Lightning
--------U-16EF-------------------------------
INT 16 - CALCULATOR - INSTALLATION CHECK
    AH = EFh
Return: AX = 0088h if installed
Program: CALCULATOR is a shareware popup calculator by Andrzej Brzezinski and
      Marek Kosznik
--------b-16F0-------------------------------
INT 16 - Compaq 386 and newer - SET CPU SPEED
    AH = F0h
    AL = speed code (see #0511)
    if AL=09h,
        CX = speed value, 1 (slowest) to 50 (full), 3 ~= 8088
Note:    also supported by some versions of AMI BIOS dated June 1992 or later;
      speed codes 0 or 1 are used for Low Speed, 2 for High Speed
SeeAlso: AH=F1h,AH=F3h

(Table 0511)
Values for speed code:
 00h    equivalent to 6 MHz 80286 (COMMON)
 01h    equivalent to 8 MHz 80286 (FAST)
 02h    full 16 MHz (HIGH)
 03h    toggles between 8 MHz-equivalent and speed set by system board switch
      (AUTO or HIGH)
 08h    full 16 MHz except 8 MHz-equivalent during floppy disk access
 09h    specify speed directly
--------t-16F0F0-----------------------------
INT 16 - TurboPower TSRs - INSTALLATION CHECK
    AX = F0F0h
Return: AX = 0F0Fh if installed
        ES:DI -> last data block in TSR list (see #0512)
Note:    the returned TSR list provides support for communication among TSRs
      built with TurboPower's Turbo Professional and Object Professional
      libraries for Turbo Pascal
SeeAlso: AX=E0E0h

Format of TurboPower TSR data block:
Offset    Size    Description    (Table 0512)
 00h    DWORD    pointer to program tag (counted ASCII string)
 04h    WORD    interface version number (0400h)
 06h    DWORD    pointer to command entry point
 0Ah    DWORD    pointer to previous data block (0000h:0000h if none)
 0Eh    DWORD    pointer to next data block (0000h:0000h if none)
---swappable TSRs only---
 12h    DWORD    pointer to swapping data
 16h    DWORD    pointer to user data
    more???
--------b-16F1-------------------------------
INT 16 - Compaq 386 and newer - READ CURRENT CPU SPEED
    AH = F1h
Return: AL = speed code (see #0511)
    if AL = 09h, CX = speed code
Note:    also supported by some versions of AMI BIOS dated June 1992 or later
SeeAlso: AH=F0h,AH=F3h
--------b-16F2-------------------------------
INT 16 - Compaq 386 and newer - DETERMINE ATTACHED KEYBOARD TYPE
    AH = F2h
Return: AL = type
        00h if 11-bit AT keyboard is in use
        01h if 9-bit PC keyboard is in use
    AH = 00h (04/08/93 system ROM)
--------b-16F3-------------------------------
INT 16 - Compaq 80286s - SET CPU SPEED LIMIT (OVERRIDE JUMPER)
    AH = F3h
    AL = new limit
        00h limit is 6 Mhz
        01h limit is 8 Mhz/6 Mhz
SeeAlso: AH=F0h,AH=F1h
--------U-16F398-----------------------------
INT 16 U - NORTON GUIDES - INSTALLATION CHECK
    AX = F398h
Return: AX = 6A73h ("js")
    BH = BIOS scan code of current hot key
    BL = ASCII code of current hot key
Note:    NG.EXE was written by John Socha
--------b-16F400-----------------------------
INT 16 - Compaq Systempro and higher - CACHE CONTROLLER STATUS
    AX = F400h
Return: AH = E2h (*)
    AL = status
        00h not present
        01h enabled
        02h disabled
    CX = cache memory size
        bit 15:    cache size information is NOT valid
        bits 14-0:    cache memory size in kilobytes
    DH = cache write technology
        bit 7:    cache write information is NOT valid
        bits 6-1:    reserved (0)
        bit 0:    0 = Write-through caching
            1 = Write-back caching
    DL = cache type
        bit 7:    cache type information is NOT valid
        bits 6-1:    reserved (0)
        bit 0:    0 = Direct mapped
            1 = Two-way set-associative
Notes:    also supported by some versions of AMI BIOS dated June 1992 or later
    many (most) BIOSes return a modified AH when called for an unsupported
      or non-keyboard function (typically, the highest supported keyboard
      function [normally 12h] is subtracted from the original AH)
SeeAlso: AX=F401h,AX=F402h
--------b-16F401-----------------------------
INT 16 - Compaq Systempro and higher - ENABLE CACHE CONTROLLER
    AX = F401h
Return: AX = E201h
Notes:    also supported by some versions of AMI BIOS dated June 1992 or later
    many (most) BIOSes return a modified AH when called for an unsupported
      or non-keyboard function (typically, the highest supported keyboard
      function [normally 12h] is subtracted from the original AH)
SeeAlso: AX=F400h,AX=F402h
--------b-16F402-----------------------------
INT 16 - Compaq Systempro and higher - DISABLE CACHE CONTROLLER
    AX = F402h
Return: AX = E202h
Notes:    also supported by some versions of AMI BIOS dated June 1992 or later
    many (most) BIOSes return a modified AH when called for an unsupported
      or non-keyboard function (typically, the highest supported keyboard
      function [normally 12h] is subtracted from the original AH)
SeeAlso: AX=F400h,AX=F401h
--------v-16FA00DX5945-----------------------
INT 16 U - PC Tools v8+ VSAFE, VWATCH - INSTALLATION CHECK
    AX = FA00h
    DX = 5945h
Return: CF clear
    DI = 4559h
    BX = BIOS hotkey scancode (default 2F00h) (VSAFE only)
        FFFFh if disabled
Note:    MS-DOS 6.0 bundles VSAFE and VWATCH as part of its virus protection
SeeAlso: AX=FA05h,INT 13/AH=FAh,INT 21/AH=FAh"VDEFEND",INT 2F/AX=6282h
--------v-16FA01DX5945-----------------------
INT 16 U - PC Tools v8+ VSAFE, VWATCH - UNINSTALL
    AX = FA01h
    DX = 5945h
Return: CF clear if successful
    DI = 4559h
SeeAlso: AX=FA00h
--------v-16FA02DX5945-----------------------
INT 16 U - PC Tools v8+ VSAFE, VWATCH - GET/SET OPTIONS
    AX = FA02h
    DX = 5945h
    BL = new parameter flags (see #0513)
Return: CF clear
    DI = 4559h
    CL = old value of parameter flags

Bitfields for VSAFE/VWATCH parameter flags:
Bit(s)    Description    (Table 0513)
 7    Protect executable files
 6    Protect FD boot sector
 5    Protect HD boot sector
 4    Boot sector viruses
 3    Check executable files
 2    General write protect
 1    Resident
 0    HD Low level format
--------v-16FA03DX5945-----------------------
INT 16 U - PC Tools v8+ VSAFE, VWATCH - GET ???
    AX = FA03h
    DX = 5945h
Return: CF clear
    DI = 4559h
    AX = 0002h
--------v-16FA04DX5945-----------------------
INT 16 U - PC Tools v8+ VSAFE - GET HOTKEY DISABLE FLAG
    AX = FA04h
    DX = 5945h
Return: CF clear
    DI = 4559h
    BL = hotkey disable flag (nonzero if hotkey disabled)
Note:    this function is a NOP under VWATCH, merely returning CF clear/DI=4559h
SeeAlso: AX=FA00h,AX=FA05h
--------v-16FA05DX5945-----------------------
INT 16 U - PC Tools v8+ VSAFE - SET HOTKEY DISABLE FLAG
    AX = FA05h
    DX = 5945h
    BL = new value of hotkey disable flag (nonzero to disable hotkey)
Return: CF clear
    DI = 4559h
Note:    this function is a NOP under VWATCH, merely returning CF clear/DI=4559h
SeeAlso: AX=FA00h,AX=FA04h
--------v-16FA06DX5945-----------------------
INT 16 U - PC Tools v8+ VSAFE, VWATCH - GET NETWORK DRIVES TEST FLAG
    AX = FA06h
    DX = 5945h
Return: CF clear
    DI = 4559h
    BL = test status
        00h don't monitor network drives (default for VWATCH v2.1)
        FFh monitor network drives (default for VSAFE v2.0)
    CL = ??? (only VSAFE 2.0)
SeeAlso: AX=FA07h
--------v-16FA07DX5945-----------------------
INT 16 U - PC Tools v8+ VSAFE, VWATCH - SET NETWORK DRIVES TEST FLAG
    AX = FA07h
    DX = 5945h
    BL = new state
        00h don't monitor
        01h monitor network drives
Return: CF clear
    DI = 4559h
Note:    VWATCH v2.1 (from PC Tools 9.0) returns CF set instead
SeeAlso: AX=FA00h,AX=FA06h
--------v-16FA08DX5945-----------------------
INT 16 U - PC Tools v9+ VWATCH v2.1 - ???
    AX = FA08h
    DX = 5945h
Return: CF clear
    DI = 4559h
    AX = ??? (0002h)
    BX = version (BH=major, BL=two-digit minor)
Note:    this function is not supported by the PC Tools 9.0 VSAFE v2.0
SeeAlso: AX=FA00h,AX=FA06h
--------U-16FE55-----------------------------
INT 16 U - PC Tools v8+ programs - GET ???
    AX = FE55h
    CX = segment of resident program or 0000h for last loaded
    DX = 0000h
Return: DX = resident code segment (unchanged if CX=0000h on entry)
    AX = ??? or 0000h
Note:    this call is supported by CPSCHED, CPTASK, DATAMON, DPROTECT, DRIVEMAP,
      and DSKLIGHT beginning in PC Tools v8.0; programs other than CPTASK
      seem to hook it merely to return the same AX as the CPTASK loaded
      prior to them returned
--------U-16FEA4-----------------------------
INT 16 U - PC Tools v7+ CPSCHED/DESKTOP - RESET ???
    AX = FEA4h
Return: nothing
Note:    this function is identical to AX=FFA4h, and is implemented by the same
      code in DESKTOP
SeeAlso: AX=FFA4h
--------U-16FEC6-----------------------------
INT 16 U - PC Tools v7+ CPSCHED - ENABLE/DISABLE CPSCHED API
    AX = FEC6h
    BL = new state (00h enabled, nonzero disabled)
Return: nothing
Desc:    specify whether CPSCHED API calls other than this one and AX=FE55h will
      be honored
--------U-16FED3-----------------------------
INT 16 U - PC Tools v7+ CPSCHED/DESKTOP - ???
    AX = FED3h
    DS:SI -> 92-byte data record for ???
Return: ???
Note:    this function is identical to AX=FFD3h, and is implemented by the same
      code in DESKTOP
SeeAlso: AX=FFD3h
--------U-16FEDC-----------------------------
INT 16 U - PC Tools v7+ CPSCHED - UNHOOK INTERRUPTS
    AX = FEDCh
Return: AX,DX destroyed
Index:    uninstall;CPSCHED
--------U-16FEEFCX0000-----------------------
INT 16 U - PC Tools v7+ CPSCHED/DESKTOP - INSTALLATION CHECK
    AX = FEEFh
    CX = 0000h
Return: CX = ABCDh if PC Tools scheduler (CPSCHED or DESKTOP) installed
        BX = segment of resident portion
        DX = (CPSCHED v8.0) resident CS
Note:    this function is identical to AX=FFD3h, and is implemented by the same
      code in DESKTOP
SeeAlso: AX=FFEFh
--------U-16FEF1-----------------------------
INT 16 U - PC Tools v7 only CPSCHED/DESKTOP - ALTERNATE INSTALLATION CHECK
    AX = FEF1h
    BX = ???
Return: CX = 5555h if PC Tools scheduler (CPSCHED or DESKTOP) installed
    DX = 5555h
Note:    this function is identical to AX=FFD3h, and is implemented by the same
      code in DESKTOP
SeeAlso: AX=FFF1h
--------!---Section--------------------------