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Interrupt List, part 7 of 12 This compilation is Copyright (c) 1989,1990,1991,1992,1993,1994,1995 Ralf Brown --------l-2E--------------------------------- INT 2E U - DOS 2+ - PASS COMMAND TO COMMAND INTERPRETER FOR EXECUTION DS:SI -> commandline to execute (see #1371) Return: all registers except CS:IP destroyed AX = status (4DOS v4.0) 0000h successful FFFFh error before processing command (not enough memory, etc) other error number returned by command Notes: this call allows execution of arbitrary commands (including COMMAND.COM internal commands) without loading another copy of COMMAND.COM if COMMAND.COM is the user's command interpreter, the primary copy executes the command; this allows the master environment to be modified by issuing a "SET" command, but changes in the master environment will not become effective until all programs descended from the primary COMMAND.COM terminate since COMMAND.COM processes the string as if typed from the keyboard, the transient portion needs to be present, and the calling program must ensure that sufficient memory to load the transient portion can be allocated by DOS if necessary results are unpredictable if invoked by a program run from a batch file because this call is not reentrant and COMMAND.COM uses the same internal variables when processing a batch file hooked but ignored by 4DOS v3.0 COMMAND.COM replacement unless SHELL2E has been loaded the MS-DOS 5 Programmer's Reference calls this "Reload Transient" Format of DOS commandline: Offset Size Description (Table 1371) 00h BYTE length of command string, not counting trailing CR 01h var command string N BYTE 0Dh (CR) --------O-2E--------------------------------- INT 2E UP - Windows NT - NATIVE API EAX = function number EDX = address of parameter block Return: ??? --------l-2E----BXE22E----------------------- INT 2E - 4DOS v2.x-3.03 SHELL2E.COM - UNINSTALL BX = E22Eh DS:SI -> zero byte Return: if successful, SHELL2E terminates itself with INT 21/AH=4Ch ----------2F--------------------------------- INT 2F - Multiplex - NOTES AH = identifier of program which is to handle the interrupt 00h-7Fh reserved for DOS B8h-BFh reserved for networks C0h-FFh reserved for applications AL is the function code This is a general mechanism for verifying the presence of a TSR and communicating with it. When searching for a free identifier code for AH using the installation check (AL=00h), the calling program should set BX/CX/DX to 0000h and must not depend on any registers other than CS:IP and SS:SP to be valid on return, since numerous programs now use additional registers on input and/or output for the installation check. Notes: Since the multiplex chain is growing so long, and beginning to experience multiplex number collisions, I am proposing an alternate multiplex interrupt on INT 2D. If you decide to use the alternate multiplex, please let me know. DOS and some other programs return values in the flags register, so any TSR which chains by calling the previous handler rather than jumping to it should ensure that the returned flags are preserved and passed back to the original caller SeeAlso: INT 2D --------t-2F--------------------------------- INT 2F - BMB Compuscience Canada Utilities Interface - INSTALLATION CHECK AH = xx (dynamically assigned based upon a search for a multiplex number which doesn't answer installed) AL = 00h installation check ES:DI = EBEBh:BEBEh Return: AL = 00h not installed 01h not installed, not OK to install FFh installed; if ES:DI was EBEBh:BEBEh on entry, ES:DI will point to a string of the form 'MMMMPPPPPPPPvNNNN' where MMMM is a short form of the manufacturer's name, PPPPPPPP is a product name and NNNN is the product's version number --------t-2F--------------------------------- INT 2F - Ross Wentworth's Turbo Pascal POPUP LIBRARY AH = programmer-selected multiplex number AL = function 00h installation check Return: AL = FFh if installed 01h get TSR interrupt vectors Return: DX:AX -> vector table (see #1372) 02h get TSR code segment Return: AX = code segment for all interrupt handlers 03h call user exit routine and release TSR's memory 04h get signature string Return: DX:AX -> counted string containing signature 05h get TSR's INT 2F handler Return: DX:AX -> INT 2F handler 06h enable/disable TSR BL = new state (00h disabled, 01h enabled) 07h activate TSR (popup if not disabled) 08h get hotkeys BL = which hotkey (00h = hotkey 1, 01h = hotkey 2) Return: AX = hotkey (AH = keyflags, AL = scancode) 09h set hotkey BL = which hotkey (00h = hotkey 1, 01h = hotkey 2) CX = new hotkey (CH = keyflags, CL = scancode) 0Ah-1Fh reserved Index: installation check;Ross Wentworth POPUP library Index: hotkeys;Ross Wentworth POPUP library Format of POPUP vector table entry: Offset Size Description (Table 1372) 00h BYTE vector number (00h = end of table) 01h DWORD original vector 05h WORD offset of interrupt handler in TSR's code segment --------t-2F--------------------------------- INT 2F - CiriSOFT Spanish University of Valladolid TSR's Interface AH = xx (dynamically assigned based upon a search for a multiplex number from C0h to FFh which doesn't answer installed) AL = 00h installation check ES:DI = 1492h:1992h Return: AL = 00h not installed 01h not installed, not OK to install FFh installed; and if ES:DI was 1492h:1992h on entry, ES:DI will point to author_name_ver table (see #1373) AH = FFh Note: this interface permits advanced communication with TSRs: it is possible to make a generic uninstall utility, advanced TSR relocator programs in order to fit fragmented memory areas, etc. See also: INT 2D"AMIS",INT 2F"Compuscience" Index: installation check;CiriSOFT TSR interface Index: uninstall;CiriSOFT TSR interface Format of CiriSOFT author_name_ver table: Offset Size Description (Table 1373) -16 WORD segment of the start of the resident TSR code (CS in programs with PSP, XMS upper memory segment if installed as UMB...) -14 WORD offset of the start of the resident TSR code (frequently 100h in *.COM programs and 0 in upper memory TSR's). -12 WORD memory used by TSR (in paragraphs). Knowing the memory area used by TSR is possible to determine if hooked vectors are still pointing it (and if it is safe to uninstall). -10 BYTE characteristics byte (see #1374) -9 BYTE number of multiplex entry used (redefinition available). Note that the TSR must use THIS variable in it's INT 2Fh handler. -8 WORD offset to vector_area table (see #1375) -6 WORD offset to extra_area table (see #1376,bit 7 in offset -10) -4 4 BYTEs signature string "*##*" 00h var "AUTHOR:PROGRAM_NAME:VERSION",0 (variable length, this area is used in order to determine if the TSR is already resident and it's version code; the ':' char is used as delimiter) Bitfields for CiriSOFT characteristics byte: Bit(s) Description (Table 1374) 0-2 type 000 normal program (with PSP) 001 upper XMS memory block (needed HIMEM.SYS function to free memory when uninstalling) 010 device driver (*.SYS) 011 device driver in EXE format 1xx others (reserved) 3-6 reserved 7 set if extra_table defined and supported (see #1376) SeeAlso: #1373 Format of CiriSOFT vector_area table: Offset Size Description (Table 1375) -1 BYTE number of vectors intercepted by TSR 00h BYTE first vector number 01h DWORD first vector pointer before installing the TSR 05h BYTE second vector number 06h DWORD second vector pointer before installing the TSR 0Ah ... (and so on) Note: the TSR must use these variables to invoke the previous interrupt handler routines SeeAlso: #1373 Format of extra_area table (needed only to improve relocation feature): Offset Size Description (Table 1376) 00h WORD offset to external_ctrl table (see #1377) 0000h if not supported 02h WORD reserved for future use (0) SeeAlso: #1373 Format of CiriSOFT external_ctrl table: Offset Size Description (Table 1377) 00h BYTE bit 0: TSR is relocatable (no absolute segment references) 01h WORD offset to a variable which can activate/inhibit the TSR ---And if bit 0 in offset 00h is off: 03h DWORD pointer to ASCIZ pathname for executable file which supports /SR parameter (silent installation & inhibit) 07h DWORD pointer to first variable to initialize on the copy reloaded from the previous TSR still resident 0Bh DWORD pointer to last variable (all variables packed in one block) --------c-2F00------------------------------- INT 2F U - DOS 2.x only PRINT.COM - ??? AH = 00h ??? Return: ??? Notes: DOS 2.x PRINT.COM does not chain to previous INT 2F handler values in AH other than 00h or 01h cause PRINT to return the number of files in the queue in AH SeeAlso: AH=01h --------P-2F00------------------------------- INT 2F U - PSPRINT - PRINT JOB CONTROL AH = 00h ??? Return: ??? --------c-2F0080----------------------------- INT 2F - DOS 3.1+ PRINT - GIVE PRINT A TIME SLICE AX = 0080h Return: after PRINT executes Notes: PRINT returns AL=01h if AH=00h but AL is not 80h on entry this function is not supported by the Novell DOS 7 PRINT.COM --------N-2F00D8----------------------------- INT 2F - Personal NetWare - VLM - ??? AX = 00D8h ??? Return: ??? Note: hooked by one of the .VLMs loaded by VLM.EXE v1.10, but apparently a NOP --------c-2F01------------------------------- INT 2F U - DOS 2.x only PRINT.COM - ??? AH = 01h ??? Return: ??? Notes: DOS 2.x PRINT.COM does not chain to previous INT 2F handler values in AH other than 00h or 01h cause PRINT to return the number of files in the queue in AH SeeAlso: AH=00h --------c-2F0100----------------------------- INT 2F - DOS 3+ PRINT - INSTALLATION CHECK AX = 0100h Return: AL = status 00h not installed 01h not installed, but not OK to install FFh installed AH = 00h (Novell DOS 7) SeeAlso: AX=0101h --------c-2F0100SI20D6----------------------- INT 2F U - PrintCache 3.1 PRINT.COM - INSTALLATION CHECK AX = 0100h SI = 20D6h DI = 8761h Return: AX = 00FFh if installed DI = 0001h if PrintCache's PRINT.COM installed and magic values match SI = resident code segment Program: PrintCache PRINT.COM is a DOS PRINT replacement included in LaserTools' PrintCache memory/disk-based print spooler package Note: if either of SI or DI differ from the indicated magic values, only AX will be modified on return, for compatibility with DOS PRINT SeeAlso: AX=0101h/SI=20D6h,AX=C000h"PCACHE" --------c-2F0101----------------------------- INT 2F - DOS 3+ PRINT - SUBMIT FILE FOR PRINTING AX = 0101h DS:DX -> submit packet (see #1378) Return: CF clear if successful AL = status 01h added to queue 9Eh now printing CF set on error AX = error code (see #1379,#0885 at INT 21/AH=59h) SeeAlso: AX=0102h Format of PRINT submit packet: Offset Size Description (Table 1378) 00h BYTE level (must be 00h) 01h DWORD pointer to ASCIZ filename (no wildcards) (Table 1379) Values for PRINT error code: 0001h invalid function 0002h file not found 0003h path not found 0004h out of file handles 0005h access denied 0008h print queue full 0009h spooler busy 000Ch name too long 000Fh invalid drive --------c-2F0101SI20D6----------------------- INT 2F U - PrintCache v3.1 PRINT.COM - SUBMIT FILE FOR PRINTING AX = 0101h SI = 20D6h DI = 8761h DS:DX -> submit packet (see #1378) CL = print options bit 4: use default options Return: CF clear if successful AL = status 01h added to queue 9Eh now printing CF set on error AX = error code (see #1379) Program: PrintCache PRINT.COM is a DOS PRINT replacement included in LaserTools' PrintCache memory/disk-based print spooler package Note: if either SI or DI differs from the indicated magic values on entry, PrintCache will use the default print options for the file for compatibility with DOS PRINT SeeAlso: AX=0100h/SI=20D6h,AX=0101h,AX=0107h"PrintCache" --------c-2F0102----------------------------- INT 2F - DOS 3+ PRINT - REMOVE FILE FROM PRINT QUEUE AX = 0102h DS:DX -> ASCIZ filename (wildcards allowed) Return: CF clear if successful CF set on error AX = error code (see #1379) SeeAlso: AX=0101h,AX=0103h --------c-2F0103----------------------------- INT 2F - DOS 3+ PRINT - CANCEL ALL FILES IN PRINT QUEUE AX = 0103h Return: CF clear if successful CF set on error AX = error code (see #1379) SeeAlso: AX=0102h --------c-2F0104----------------------------- INT 2F - DOS 3+ PRINT - FREEZE PRINT QUEUE TO READ JOB STATUS AX = 0104h Return: CF clear if successful DX = error count since status last read DS:SI -> print queue CF set on error AX = error code (see #1379) Desc: get the list of print jobs, temporarily suspending PRINT's activities to avoid changing the list while it is being examined Notes: the print queue is an array of 64-byte ASCIZ filenames terminated by an empty filename; the first name is the file currently being printed printing is stopped until AX=0105h is called to prevent the queue from changing while the filenames are being read SeeAlso: AX=0101h,AX=0105h --------c-2F0105----------------------------- INT 2F - DOS 3+ PRINT - RESTART PRINT QUEUE AFTER STATUS READ AX = 0105h Return: CF clear if successful CF set on error AX = error code (see #1379) Desc: restart PRINT's activities once an application finishes examining the print queue SeeAlso: AX=0104h --------c-2F0106----------------------------- INT 2F - DOS 3.3+ PRINT - GET PRINTER DEVICE AX = 0106h Return: CF set if files in print queue AX = error code 0008h (queue full) DS:SI -> device driver header CF clear if print queue empty AX = 0000h Desc: determine which device, if any, PRINT is currently using for output Notes: undocumented prior to the release of MS-DOS 5.0 this function can be used to allow a program to avoid printing to the printer on which PRINT is currently performing output SeeAlso: AX=0104h --------c-2F0107----------------------------- INT 2F U - PrintCache v3.1 PRINT.COM - SET TRAILING FORM FEEDS AX = 0107h CL bit 0: output form feed between print jobs Return: AL destroyed SeeAlso: AX=0100h/SI=20D6h,AX=0101h/SI=20D6h --------N-2F0200----------------------------- INT 2F U - PC LAN PROGRAM REDIR/REDIRIFS internal - INSTALLATION CHECK AX = 0200h Return: AL = FFh if installed Desc: determine whether the PC LAN Program redirector is installed SeeAlso: AX=0201h,AX=0203h --------N-2F0201----------------------------- INT 2F U - PC LAN PROGRAM REDIR/REDIRIFS internal - ??? AX = 0201h Return: nothing??? Notes: this function is called by the DOS 3.3+ PRINT.COM AX=0202h appears to be the opposite function these functions are supposedly used to signal opening and closing of printers SeeAlso: AX=0202h --------N-2F0202----------------------------- INT 2F U - PC LAN PROGRAM REDIR/REDIRIFS internal - ??? AX = 0202h ??? Return: nothing??? Notes: this function is called by the DOS 3.3+ PRINT.COM these functions are supposedly used to signal opening and closing of printers SeeAlso: AX=0201h --------N-2F0203----------------------------- INT 2F U - PC LAN PROGRAM REDIR/REDIRIFS internal - ??? AX = 0203h Return: nothing??? Notes: this function is called by the DOS 3.3+ PRINT.COM AX=0204h appears to be the opposite function these functions are supposedly used to signal opening and closing of printers SeeAlso: AX=0200h,AX=0204h --------N-2F0204----------------------------- INT 2F U - PC LAN PROGRAM REDIR/REDIRIFS internal - ??? AX = 0204h ??? Return: nothing??? Notes: this function is called by the DOS 3.3+ PRINT.COM AX=0203h appears to be the opposite function these functions are supposedly used to signal opening and closing of printers SeeAlso: AX=0200h,AX=0203h --------N-2F--------------------------------- INT 2F U - PC LAN PROGRAM REDIR/REDIRIFS internal - ??? AX = 02xxh ??? Return: ??? --------l-2F0500----------------------------- INT 2F U - DOS 3+ CRITICAL ERROR HANDLER - INSTALLATION CHECK AX = 0500h Return: AL = 00h not installed, OK to install 01h not installed, can't install FFh installed Desc: determine whether a critical error message override is installed Note: this set of functions allows a user program to partially or completely override the default critical error handler's message in COMMAND.COM SeeAlso: AH=05h,INT 24 --------l-2F05------------------------------- INT 2F CU - DOS 3+ CRITICAL ERROR HANDLER - EXPAND ERROR INTO STRING AH = 05h ---DOS 3.x--- AL = extended error code (not zero) ---DOS 4+ --- AL = error type 01h DOS extended error code 02h parameter error BX = error code Return: CF clear if successful ES:DI -> ASCIZ error message (read-only) AL = completion state 00h message requires completion with device name, drive, etc. 01h message is complete as returned CF set if error code can't be converted to string AX,DI,ES destroyed other flags corrupted Notes: called at start of COMMAND.COM's default critical error handler if installed by a user program, allowing partial or complete overriding of the default error messages subfunction 02h is called by many DOS 4 external programs DR-DOS's COMMAND.COM appends additional info ("0 files copied") to the returned string SeeAlso: AX=0500h,AX=122Eh,INT 24 --------U-2F0600----------------------------- INT 2F - DOS 3+ ASSIGN - INSTALLATION CHECK AX = 0600h Return: AL = status 00h not installed 01h not installed, but not OK to install FFh installed Notes: ASSIGN is not a TSR in DR-DOS 5.0; it is internally replaced by SUBST (see INT 21/AH=52h) undocumented prior to the release of DOS 5.0 SeeAlso: AX=0601h,INT 21/AH=52h --------U-2F0601----------------------------- INT 2F U - DOS 3+ ASSIGN - GET DRIVE ASSIGNMENT TABLE AX = 0601h Return: ES = segment of ASSIGN work area and assignment table Note: under DOS 3+, the 26 bytes starting at ES:0103h specify which drive each of A: to Z: is mapped to. Initially set to 01h 02h 03h.... SeeAlso: AX=0600h --------D-2F0800----------------------------- INT 2F U - DRIVER.SYS support - INSTALLATION CHECK AX = 0800h Return: AL = status 00h not installed, OK to install 01h not installed, not OK to install FFh installed Desc: determine whether the internal support code used by DRIVER.SYS is present; it is always present in DOS 3.2+ Note: supported by DR-DOS 5.0 --------D-2F0801----------------------------- INT 2F U - DRIVER.SYS support - ADD NEW BLOCK DEVICE AX = 0801h DS:DI -> drive data table (see #1386,#1387,#1388) Return: AX,BX,SI,ES destroyed Notes: moves down internal list of drive data tables, copying and modifying the drive description flags word for tables referencing same physical drive the data table is appended to the chain of tables supported by DR-DOS 5.0 SeeAlso: AX=0803h --------D-2F0802----------------------------- INT 2F U - DRIVER.SYS support - EXECUTE DEVICE DRIVER REQUEST AX = 0802h ES:BX -> device driver request header (see #1382) Return: request header updated as per requested operation Notes: supported by DR-DOS 5.0 DOS 3.2 executes this function on any AL value from 02h through F7h; DOS 4+ executes this function on AL=02h and AL=04h-F7h the command codes (see #1380) and structures described below apply to all drivers which support the appropriate commands; this call is just one of a number of ways in which a device driver request may be invoked this call reportedly leaves one word on the stack under MS-DOS 6.2, so the stack pointer should be saved and restored around the call to this function SeeAlso: AX=0800h,AX=0801h,AX=0803h,INT 21/AH=52h,INT 21/AH=99h,INT 21/AH=9Ah (Table 1380) Values for device driver command code: 00h INIT 01h MEDIA CHECK (block devices) 02h BUILD BPB (block devices) 03h IOCTL INPUT 04h INPUT 05h NONDESTRUCTIVE INPUT, NO WAIT (character devices) 06h INPUT STATUS (character devices) 07h INPUT FLUSH (character devices) 08h OUTPUT 09h OUTPUT WITH VERIFY 0Ah OUTPUT STATUS (character devices) 0Bh OUTPUT FLUSH (character devices) 0Ch IOCTL OUTPUT 0Dh (DOS 3+) DEVICE OPEN 0Eh (DOS 3+) DEVICE CLOSE 0Fh (DOS 3+) REMOVABLE MEDIA (block devices) 10h (DOS 3+) OUTPUT UNTIL BUSY (character devices) 11h (European MS-DOS 4.0) STOP OUTPUT (console screen drivers only) 12h (European MS-DOS 4.0) RESTART OUTPUT (console screen drivers only) 13h (DOS 3.2+) GENERIC IOCTL 14h unused 15h (European MS-DOS 4.0) RESET UNCERTAIN MEDIA FLAG 16h unused 17h (DOS 3.2+) GET LOGICAL DEVICE 18h (DOS 3.2+) SET LOGICAL DEVICE 19h (DOS 5+) CHECK GENERIC IOCTL SUPPORT 80h (CD-ROM) READ LONG 81h (CD-ROM) reserved 82h (CD-ROM) READ LONG PREFETCH 83h (CD-ROM) SEEK 84h (CD-ROM) PLAY AUDIO 85h (CD-ROM) STOP AUDIO 86h (CD-ROM) WRITE LONG 87h (CD-ROM) WRITE LONG VERIFY 88h (CD-ROM) RESUME AUDIO Bitfields for device request status: Bit(s) Description (Table 1381) 15 error 14-11 reserved 10 ??? set by DOS kernel on entry to some driver calls 9 busy 8 done (may be clear on return under European MS-DOS 4.0) 7-0 error code if bit 15 set (see #1383) Format of device driver request header: Offset Size Description (Table 1382) 00h BYTE length of request header 01h BYTE subunit within device driver 02h BYTE command code (see #1380) 03h WORD status (filled in by device driver) (see #1381) ---DOS--- 05h 4 BYTEs reserved (unused in DOS 2.x and 3.x) 09h DWORD (European MS-DOS 4.0 only) pointer to next request header in device's request queue (other versions) reserved (unused in DOS 2.x and 3.x) ---STARLITE architecture--- 05h DWORD pointer to next request header 09h 4 BYTEs reserved ---command code 00h--- 0Dh BYTE (ret) number of units 0Eh DWORD (call) pointer to DOS device helper function (see #1384) (European MS-DOS 4.0 only) (call) pointer past end of memory available to driver (DOS 5+) (ret) address of first free byte following driver 12h DWORD (call) pointer to commandline arguments (ret) pointer to BPB array (block drivers) or 0000h:0000h (character drivers) 16h BYTE (DOS 3+) drive number for first unit of block driver (0=A) ---European MS-DOS 4.0--- 17h DWORD pointer to function to save registers on stack ---DOS 5+ --- 17h WORD (ret) error-message flag 0001h MS-DOS should display error msg on init failure ---command code 01h--- 0Dh BYTE media descriptor 0Eh BYTE (ret) media status 00h don't know 01h media has not changed FFh media has been changed 0Fh DWORD (return, DOS 3+) pointer to previous volume ID if OPEN/CLOSE/RM bit in device header is set and disk changed ---command code 02h--- 0Dh BYTE media descriptor 0Eh DWORD transfer address -> scratch sector if NON-IBM FORMAT bit in device header set -> first FAT sector otherwise 12h DWORD pointer to BPB (set by driver) (see #0875 at INT 21/AH=53h) ---command codes 03h,0Ch--- (see also INT 21/AX=4402h,INT 21/AX=4403h) 0Dh BYTE media descriptor (block devices only) 0Eh DWORD transfer address 12h WORD (call) number of bytes to read/write (ret) actual number of bytes read or written ---command codes 04h,08h,09h (except Compaq DOS 3.31, DR-DOS 6)--- 0Dh BYTE media descriptor (block devices only) 0Eh DWORD transfer address 12h WORD byte count (character devices) or sector count (block devices) 14h WORD starting sector number (block devices only) 16h DWORD (DOS 3+) pointer to volume ID if error 0Fh returned 1Ah DWORD (DOS 4+) 32-bit starting sector number (block devices with device attribute word bit 1 set only) if starting sector number above is FFFFh (see INT 21/AH=52h) ---command codes 04h,08h,09h (Compaq DOS 3.31, DR-DOS 6)--- 0Dh BYTE media descriptor (block devices only) 0Eh DWORD transfer address 12h WORD byte count (character devices) or sector count (block devices) 14h DWORD 32-bit starting sector number (block devices only) Note: to reliably determine which variant of the request block for functions 04h,08h,09h has been passed to the driver, check the length field as well as the word at offset 14h. If the length is 1Eh and 14h=FFFFh, use the DWORD at 1Ah as the starting sector number; if the length is 18h, use the DWORD at 14h; otherwise, use the WORD at 14h. ---command code 05h--- 0Dh BYTE byte read from device if BUSY bit clear on return ---command codes 06h,07h,0Ah,0Bh,0Dh,0Eh,0Fh--- no further fields ---command code 10h--- 0Dh BYTE unused 0Eh DWORD transfer address 12h WORD (call) number of bytes to write (ret) actual number of bytes written ---command codes 11h,12h--- 0Dh BYTE reserved ---command code 15h--- no further fields ---command codes 13h,19h--- 0Dh BYTE category code 00h unknown 01h COMn: 03h CON 05h LPTn: 07h mouse (European MS-DOS 4.0) 08h disk 9Eh (STARLITE) Media Access Control driver 0Eh BYTE function code 00h (STARLITE) MAC Bind request 0Fh WORD copy of DS at time of IOCTL call (apparently unused in DOS 3.3) SI contents (European MS-DOS 4.0) 11h WORD offset of device driver header DI contents (European MS-DOS 4.0) 13h DWORD pointer to parameter block from INT 21/AX=440Ch or AX=440Dh ---command codes 80h,82h--- 0Dh BYTE addressing mode 00h HSG (default) 01h Phillips/Sony Red Book 0Eh DWORD transfer address (ignored for command 82h) 12h WORD number of sectors to read (if 0 for command 82h, request is an advisory seek) 14h DWORD starting sector number logical sector number in HSG mode frame/second/minute/unused in Red Book mode (HSG sector = minute * 4500 + second * 75 + frame - 150) 18h BYTE data read mode 00h cooked (2048 bytes per frame) 01h raw (2352 bytes per frame, including EDC/ECC) 19h BYTE interleave size (number of sectors stored consecutively) 1Ah BYTE interleave skip factor (number of sectors between consecutive portions) ---command code 83h--- 0Dh BYTE addressing mode (see above) 0Eh DWORD transfer address (ignored) 12h WORD number of sectors to read (ignored) 14h DWORD starting sector number (see also above) ---command code 84h--- 0Dh BYTE addressing mode (see above) 0Eh DWORD starting sector number (see also above) 12h DWORD number of sectors to play ---command codes 85h,88h--- no further fields ---command codes 86h,87h--- 0Dh BYTE addressing mode (see above) 0Eh DWORD transfer address (ignored in write mode 0) 12h WORD number of sectors to write 14h DWORD starting sector number (see also above) 18h BYTE write mode 00h mode 0 (write all zeros) 01h mode 1 (default) (2048 bytes per sector) 02h mode 2 form 1 (2048 bytes per sector) 03h mode 2 form 2 (2336 bytes per sector) 19h BYTE interleave size (number of sectors stored consecutively) 1Ah BYTE interleave skip factor (number of sectors between consecutive portions) (Table 1383) Values for device driver error code: 00h write-protect violation 01h unknown unit 02h drive not ready 03h unknown command 04h CRC error 05h bad drive request structure length 06h seek error 07h unknown media 08h sector not found 09h printer out of paper 0Ah write fault 0Bh read fault 0Ch general failure 0Dh reserved 0Eh (CD-ROM) media unavailable 0Fh invalid disk change (Table 1384) Call European MS-DOS 4.0 device helper function with: DL = function 00h "SchedClock" called on each timer tick AL = tick interval in milliseconds 01h "DevDone" device I/O complete ES:BX -> request header Note: must update status word first; may be called from an interrupt handler 02h "PullRequest" pull next request from queue DS:SI -> DWORD pointer to start of device's request queue Return: ZF clear if pending request ES:BX -> request header ZF set if no more requests 03h "PullParticular" remove specific request from queue DS:SI -> DWORD pointer to start of device's request queue ES:BX -> request header Return: ZF set if request header not found 04h "PushRequest" push the request onto the queue DS:SI -> DWORD pointer to start of device's request queue ES:BX -> request header interrupts disabled 05h "ConsInputFilter" keyboard input check AX = character (high byte 00h if PC ASCII character) Return: ZF set if character should be discarded ZF clear if character should be handled normally Note: called by keyboard interrupt handler so DOS can scan for special input characters 06h "SortRequest" push request in sorted order by starting sector DS:SI -> DWORD pointer to start of device's request queue ES:BX -> request header interrupts disabled 07h "SigEvent" send signal on keyboard event AH = event identifier Return: AL,FLAGS destroyed 09h "ProcBlock" block on event AX:BX = event identifier (typically a pointer) CX = timeout in ms or 0000h for never DH = interruptable flag (nonzero if pause may be interrupted) interrupts disabled Return: after corresponding ProcRun call CF clear if event wakeup, set if unusual wakeup ZF set if timeout wakeup, clear if interrupted AL = wakeup code, nonzero if unusual wakeup interrupts enabled BX,CX,DX destroyed Note: block process and schedules another to run 0Ah "ProcRun" unblock process AX:BX = event identifier (typically a pointer) Return: AX = number of processes awakened ZF set if no processes awakened BX,CX,DX destroyed 0Bh "QueueInit" initialize/clear character queue DS:BX -> character queue structure (see #1385) Note: the queue size field must be set before calling 0Dh "QueueWrite" put a character in the queue DS:BX -> character queue (see #1385) AL = character to append to end of queue Return: ZF set if queue is full ZF clear if character stored 0Eh "QueueRead" get a character from the queue DS:BX -> character queue (see #1385) Return: ZF set if queue is empty ZF clear if characters in queue AL = first character in queue 10h "GetDOSVar" return pointer to DOS variable AL = index of variable 03h current process ID BX = index into variable if AL specifies an array CX = expected length of variable Return: CF clear if successful DX:AX -> variable CF set on error AX,DX destroyed BX,CX destroyed Note: the variables may not be modified 14h "Yield" yield CPU if higher-priority task ready to run Return: FLAGS destroyed 1Bh "CritEnter" begin system critical section DS:BX -> semaphore (6 BYTEs, initialized to zero) Return: AX,BX,CX,DX destroyed 1Ch "CritLeave" end system critical section DS:BX -> semaphore (6 BYTEs, initialized to zero) Return: AX,BX,CX,DX destroyed Note: must be called in the context of the process which called CritEnter on the semaphore Note: the DWORD pointing at the request queue must be allocated by the driver and initialized to 0000h:0000h. It always points at the next request to be executed Format of European MS-DOS 4.0 character queue: Offset Size Description (Table 1385) 00h WORD size of queue in bytes 02h WORD index of next character out 04h WORD count of characters in the queue 06h N BYTEs queue buffer --------D-2F0803----------------------------- INT 2F U - DOS 4+ DRIVER.SYS support - GET DRIVE DATA TABLE LIST AX = 0803h Return: DS:DI -> first drive data table in list (see #1386,#1387,#1388) Note: not available under DR-DOS 5.0 SeeAlso: AX=0801h Format of DOS 3.30 drive data table: Offset Size Description (Table 1386) 00h DWORD pointer to next table (offset FFFFh if last table) 04h BYTE physical unit number (for INT 13) 05h BYTE logical drive number (0=A:) 06h 19 BYTEs BIOS Parameter Block (see also INT 21/AH=53h) Offset Size Description 00h WORD bytes per sector 02h BYTE sectors per cluster, FFh if unknown 03h WORD number of reserved sectors 05h BYTE number of FATs 06h WORD number of root dir entries 08h WORD total sectors 0Ah BYTE media descriptor, 00h if unknown 0Bh WORD sectors per FAT 0Dh WORD sectors per track 0Fh WORD number of heads 11h WORD number of hidden sectors 19h BYTE flags bit 6: 16-bit FAT instead of 12-bit FAT 1Ah WORD number of DEVICE OPEN calls without corresponding DEVICE CLOSE 1Ch 11 BYTEs volume label or "NO NAME " if none (always "NO NAME" for fixed media) 27h BYTE terminating null for volume label??? 28h BYTE device type (see #0781 at INT 21/AX=440Dh) 29h WORD bit flags describing drive (see #1389) 2Bh WORD number of cylinders 2Dh 19 BYTEs BIOS Parameter Block for highest capacity supported 40h 3 BYTEs ??? 43h 9 BYTEs filesystem type???, default = "NO NAME " (apparently only MS-DOS 3.30 fixed media, nulls for removable media and PC-DOS 3.30) 4Ch BYTE least-significant byte of last-accessed cylinder number ---removable media--- 4Dh DWORD time of last access in clock ticks (FFFFFFFFh if never) ---fixed media--- 4Dh WORD partition (FFFFh = primary, 0001h = extended) 4Fh WORD absolute cylinder number of partition's start on physical drive (always FFFFh if primary partition) SeeAlso: #1387,#1388 Format of COMPAQ DOS 3.31 drive data table: Offset Size Description (Table 1387) 00h DWORD pointer to next table (offset FFFFh if last table) 04h BYTE physical unit number (for INT 13) 05h BYTE logical drive number (0=A:) 06h 25 BYTEs BIOS Parameter Block (see DOS 4.0-6.0 drive data table below) 1Fh 6 BYTEs reserved fields from BPB above??? 25h BYTE flags bit 6: 16-bit FAT instead of 12-bit FAT bit 5: large volume??? 26h WORD device-open count??? 28h 11 BYTEs volume label or "NO NAME " if none (always "NO NAME" for fixed media) 33h BYTE terminating null for volume label 34h BYTE device type (see #0781 at INT 21/AX=440Dh) 35h WORD bit flags describing drive (see #1389) 37h WORD number of cylinders 39h 25 BYTEs BIOS parameter block for highest capacity drive supports 52h 6 BYTEs ??? apparently always zeros 58h BYTE least-significant byte of last-accessed cylinder number ---removable media--- 59h DWORD time of last access in clock ticks (FFFFFFFFh if never) ---fixed media--- 59h WORD partition (FFFFh = primary, 0001h = extended) 5Bh WORD absolute cylinder number of partition's start on physical drive (always FFFFh if primary partition) SeeAlso: #1386,#1388 Format of DOS 4.0-6.0 drive data table: Offset Size Description (Table 1388) 00h DWORD pointer to next table (offset FFFFh if last table) 04h BYTE physical unit number (for INT 13) 05h BYTE logical drive number (0=A:) 06h 25 BYTEs BIOS Parameter Block (see also INT 21/AH=53h) Offset Size Description 00h WORD bytes per sector 02h BYTE sectors per cluster, FFh if unknown 03h WORD number of reserved sectors 05h BYTE number of FATs 06h WORD number of root dir entries 08h WORD total sectors (see offset 15h if zero) 0Ah BYTE media descriptor, 00h if unknown 0Bh WORD sectors per FAT 0Dh WORD sectors per track 0Fh WORD number of heads 11h DWORD number of hidden sectors 15h DWORD total sectors if WORD at 08h is zero 1Fh BYTE flags bit 6: 16-bit FAT instead of 12-bit bit 7: unsupportable disk (all accesses will return Not Ready) 20h WORD device-open count 22h BYTE device type (see #0781 at INT 21/AX=440Dh) 23h WORD bit flags describing drive (see #1389) 25h WORD number of cylinders (for partition only, if hard disk) 27h 25 BYTEs BIOS Parameter Block for default (highest) capacity supported 40h 6 BYTEs reserved (part of BPB above) 46h BYTE last track accessed ---removable media--- 47h DWORD time of last access in clock ticks (FFFFFFFFh if never) ---fixed media--- 47h WORD partition (FFFFh = primary, 0001h = extended) always 0001h for DOS 5+ 49h WORD absolute cylinder number of partition's start on physical drive (FFFFh if primary partition in DOS 4.x) ------ 4Bh 11 BYTEs volume label or "NO NAME " if none (apparently taken from extended boot record rather than root directory) 56h BYTE terminating null for volume label 57h DWORD serial number 5Bh 8 BYTEs filesystem type ("FAT12 " or "FAT16 ") 63h BYTE terminating null for filesystem type SeeAlso: #1386,#1387 Bitfields for flags describing drive: Bit(s) Description (Table 1389) 0 fixed media 1 door lock ("changeline") supported 2 current BPB locked 3 all sectors in a track are the same size 4 physical drive has multiple logical units 5 current logical drive for shared physical drive 6 disk change detected 7 device parameters were changed (set DASD before formatting) (see #0780 at INT 21/AX=440Dh) 8 disk reformatted (BPB of current media was changed) 9 access flag (fixed media only, disables reads and writes) (see #0786 at INT 21/AX=440Dh) --------f-2F1000----------------------------- INT 2F - SHARE - INSTALLATION CHECK AX = 1000h Return: AL = status 00h not installed, OK to install 01h not installed, not OK to install FFh installed BUGS: values of AL other than 00h put DOS 3.x SHARE into an infinite loop (08E9: OR AL,AL 08EB: JNZ 08EB) <- the buggy instruction (DOS 3.3) values of AL other than described here put PC-DOS 4.00 into the same loop (the buggy instructions are the same) Notes: supported by OS/2 v1.3+ compatibility box, which always returns AL=FFh if DOS 4.01 SHARE was automatically loaded, file sharing is in an inactive state (due to the undocumented /NC flag used by the autoload code) until this call is made DOS 5+ chains to the previous handler if AL <> 00h on entry Windows Enhanced mode hooks this call and reports that SHARE is installed even when it is not SeeAlso: AX=1080h,INT 21/AH=52h --------d-2F1001----------------------------- INT 2F U - DR-DOS 6.0 SHARE internal - SET ??? AX = 1001h DX:BX -> ???function Notes: this function is also supported by SuperStor, a disk-compression program by Addstor which is bundled with DR-DOS 6.0, and the Novell DOS 7 DELWATCH.EXE the default handler for the pointer set by this call under DELWATCH simply returns with CF set SeeAlso: AX=1000h,AX=F800h --------f-2F1040----------------------------- INT 2F U - DOS 4 only SHARE internal - ??? AX = 1040h ??? Return: AL = FFh??? SeeAlso: AX=1000h --------f-2F1080----------------------------- INT 2F U - DOS 4 only SHARE internal - TURN ON FILE SHARING CHECKS AX = 1080h Return: AL = status F0h successful FFh checking was already on Note: DOS 4.x SHARE has dual functions: FCB support for large (>32M) media and file sharing checks. The undocumented commandline flag /NC can be used to disable the sharing code. SeeAlso: AX=1000h,AX=1081h --------f-2F1081----------------------------- INT 2F U - DOS 4 only SHARE internal - TURN OFF FILE SHARING CHECKS AX = 1081h Return: AL = status F0h successful FFh checking was already off Note: (see AX=1080h) SeeAlso: AX=1000h,AX=1080h ----------2F10FE----------------------------- INT 2F U - Novell DOS 7 DELWATCH.EXE - INSTALLATION CHECK AX = 10FEh Return: AX = 20FFh if installed and active DX:BX -> private entry point (see #1390) (Table 1390) Call DELWATCH private entry point with: AH = function 00h NOP??? Return: AX = 0000h CX = 0004h (unsupported function) 01h disable DELWATCH on drive AL = drive number (00h = A:) Return: AX = status (0000h if failed, FFFFh if successful) 02h ??? AL = drive number (00h = A:) ??? Return: ??? 03h ??? AL = drive number (00h = A:) CX = ??? (0000h/0001h) ??? Return: ??? 04h ??? AL = drive number (00h = A:) ??? Return: ??? 05h ??? AL = drive number (00h = A:) ??? Return: ??? 06h enable DELWATCH on drive AL = drive number with bit 7 set (80h = A:, etc.) BX = maximum files of same name in one directory to save CX = maximum files to save on this disk ??? Return: AX = status 0000h failed FFFFh successful CX = error code on failure (0004h if AL < 80h on entry) 07h ??? 08h set file extensions list AL = sense (00h exclude named extensions, 01h only named ext.) DS:BX -> 31-byte ASCIZ extension list (three blank-padded bytes per extension) Return: AX = FFFFh (successful) 09h ??? AL = drive number (00h = A:) ??? Return: ??? 0Ah ??? AL = drive number (00h = A:) ??? Return: ??? 0Bh reset ??? Return: AX = FFFFh (successful) see also function 0Dh 0Ch check if drive enabled AL = drive number with bit 7 set (80h = A:, etc.) Return: AX = state 0000h disabled or error (check CX) 0001h drive enabled CX = error code (0004h invalid drive number) 0Dh set ??? BX = ??? Return: AX = FFFFh (successful) see also function 0Bh 0Eh ??? AL = drive number (00h = A:) ??? Return: ??? Return: AX = 0000h, CX = 0001h if DELWATCH busy registers unchanged if AH >= 0Fh on entry --------O-2F10FF----------------------------- INT 2F U - Multiplex - DR-DOS 5.0 - ??? AX = 10FFh ES:BX -> ??? Note: sets pointer in kernel --------N-2F1100----------------------------- INT 2F C - NETWORK REDIRECTOR - INSTALLATION CHECK AX = 1100h Return: AL = status 00h not installed, OK to install 01h not installed, not OK to install FFh installed AH = product identifier (ad hoc by various manufacturers) 00h if PC Tools v8 DRIVEMAP 42h ('B') for Beame&Whiteside BWNFS v3.0a 6Eh ('n') for NetWare Lite v1.1 CLIENT Notes: this function is called by the DOS 3.1+ kernel in DOS 4.x only, the 11xx calls are all in IFSFUNC.EXE, not in the PC LAN Program redirector; DOS 5+ moves the calls back into the redirector the PC Network 1.00 redirector (renamed to PC LAN Program in 1.1-1.3) only supports AL=00h-27h --------d-2F1100SFDADA----------------------- INT 2F - MSCDEX (MS CD-ROM Extensions) - INSTALLATION CHECK AX = 1100h subfn DADAh STACK: WORD DADAh Return: AL = status 00h not installed, OK to install STACK unchanged 01h not installed, not OK to install STACK unchanged FFh installed STACK: WORD ADADh if MSCDEX installed DADBh if Lotus CD/Networker installed Note: although MSCDEX sets the stack word to ADADh on return, any value other than DADAh is considered to mean that MSCDEX is already installed; Lotus CD/Networker v4+ uses this feature to fool MSCDEX into thinking it is already installed when it is in fact CD/Networker that is installed Index: installation check;Lotus CD/Networker Index: Lotus CD/Networker;installation check --------N-2F1101----------------------------- INT 2F CU - NETWORK REDIRECTOR - REMOVE REMOTE DIRECTORY AX = 1101h SS = DOS DS SDA first filename pointer -> fully-qualified directory name SDA CDS pointer -> current directory structure for drive with dir Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful Note: this function is called by the DOS 3.1+ kernel SeeAlso: AX=1103h,AX=1105h,INT 21/AH=3Ah,INT 21/AH=60h --------N-2F1102----------------------------- INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - REMOVE REMOTE DIRECTORY AX = 1102h SS = DOS DS SDA first filename pointer -> fully-qualified directory name SDA CDS pointer -> current directory structure for drive with dir Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful Note: appears to be identical to AX=1101h; MS internal documentation calls this function "SEQ_RMDIR" SeeAlso: AX=1101h --------N-2F1103----------------------------- INT 2F CU - NETWORK REDIRECTOR - MAKE REMOTE DIRECTORY AX = 1103h SS = DOS DS SDA first filename pointer -> fully-qualified directory name SDA CDS pointer -> current directory structure for drive with dir Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful Note: this function is called by the DOS 3.1+ kernel SeeAlso: AX=1101h,AX=1105h,INT 21/AH=39h,INT 21/AH=60h --------N-2F1104----------------------------- INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - MAKE REMOTE DIRECTORY AX = 1104h SS = DOS DS SDA first filename pointer -> fully-qualified directory name SDA CDS pointer -> current directory structure for drive with dir Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful Note: appears to be identical to AX=1103h SeeAlso: AX=1103h --------N-2F1105----------------------------- INT 2F CU - NETWORK REDIRECTOR - CHDIR AX = 1105h SS = DOS DS SDA first filename pointer -> fully-qualified directory name SDA CDS pointer -> current directory structure for drive with dir Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful CDS updated with new path Notes: this function is called by the DOS 3.1+ kernel directory string in CDS should not have a terminating backslash unless the current directory is the root SeeAlso: AX=1101h,AX=1103h,INT 21/AH=3Bh,INT 21/AH=60h --------N-2F1106----------------------------- INT 2F CU - NETWORK REDIRECTOR - CLOSE REMOTE FILE AX = 1106h BX = device info word from SFT ES:DI -> SFT SFT DPB field -> DPB of drive containing file Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful SFT updated (redirector must decrement open count, which may be done with INT 2F/AX=1208h) Note: this function is called by the DOS 3.1+ kernel SeeAlso: AX=1116h,AX=1201h,AX=1208h,AX=1227h,INT 21/AH=3Eh --------N-2F1107----------------------------- INT 2F CU - NETWORK REDIRECTOR - COMMIT REMOTE FILE AX = 1107h ES:DI -> SFT SFT DPB field -> DPB of drive containing file Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful all buffers for file flushed directory entry updated Note: this function is called by the DOS 3.1+ kernel SeeAlso: INT 21/AH=68h,INT 21/AX=5D01h --------N-2F1108----------------------------- INT 2F CU - NETWORK REDIRECTOR - READ FROM REMOTE FILE AX = 1108h ES:DI -> SFT SFT DPB field -> DPB of drive containing file CX = number of bytes SS = DOS DS SDA DTA field -> user buffer Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful CX = number of bytes read (0000h = end of file) SFT updated Note: this function is called by the DOS 3.1+ kernel SeeAlso: AX=1109h,AX=1229h,INT 21/AH=3Fh,INT 21/AX=5D06h --------N-2F1109----------------------------- INT 2F CU - NETWORK REDIRECTOR - WRITE TO REMOTE FILE AX = 1109h ES:DI -> SFT SFT DPB field -> DPB of drive containing file CX = number of bytes SS = DOS DS SDA DTA field -> user buffer Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful CX = number of bytes written SFT updated Notes: this function is called by the DOS 3.1+ kernel PrintCache v3.1 PCACHE.EXE intercepts this function for SFTs where the Device Driver Header field points at PCACHE, but does not intercept any other network redirector functions SeeAlso: AX=1107h,AX=1108h,INT 21/AH=40h,INT 21/AX=5D06h --------N-2F110A----------------------------- INT 2F CU - NETWORK REDIRECTOR (DOS 3.x only) - LOCK REGION OF FILE AX = 110Ah BX = file handle CX:DX = starting offset SI = high word of size STACK: WORD low word of size ES:DI -> SFT SFT DPB field -> DPB of drive containing file SS = DOS DS Return: CF set on error AL = DOS error code (see #0885 at INT 21/AH=59h) STACK unchanged Notes: this function is called by the DOS 3.10-3.31 kernel the redirector is expected to resolve lock conflicts SeeAlso: AX=110Bh,INT 21/AH=5Ch --------N-2F110A----------------------------- INT 2F CU - NETWORK REDIRECTOR (DOS 4+) - LOCK/UNLOCK REGION OF FILE AX = 110Ah BL = function 00h lock 01h unlock CX = number of lock/unlock parameters (0001h for DOS 4.0-6.1) DS:DX -> parameter block (see #1391) ES:DI -> SFT SFT DPB field -> DPB of drive containing file SS = DOS DS Return: CF set on error AL = DOS error code (see #0885 at INT 21/AH=59h) Notes: this function is called by the DOS 4.0+ kernel the redirector is expected to resolve lock conflicts SeeAlso: AX=110Bh,INT 21/AH=5Ch Format of parameter block entry [array, but currently limited to single entry]: Offset Size Description (Table 1391) 00h DWORD start offset 04h DWORD size of region --------N-2F110B----------------------------- INT 2F CU - NETWORK REDIRECTOR (DOS 3.x only) - UNLOCK REGION OF FILE AX = 110Bh BX = file handle CX:DX = starting offset SI = high word of size STACK: WORD low word of size ES:DI -> SFT for file SFT DPB field -> DPB of drive containing file Return: CF set on error AL = DOS error code (see #0885 at INT 21/AH=59h) STACK unchanged Note: this function is called by the DOS 3.1-3.31 kernel; DOS 4.0+ calls AX=110Ah instead SeeAlso: AX=110Ah,INT 21/AH=5Ch --------N-2F110C----------------------------- INT 2F CU - NETWORK REDIRECTOR - GET DISK INFORMATION AX = 110Ch ES:DI -> current directory structure for desired drive Return: CF clear if data valid AL = sectors per cluster AH = media ID byte BX = total clusters CX = bytes per sector DX = number of available clusters CF set if data invalid Note: this function is called by the DOS 3.1+ kernel SeeAlso: INT 21/AH=36h --------N-2F110D----------------------------- INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - SET REMOTE FILE'S ATTRIBUTES AX = 110Dh SDA first filename pointer -> name of file ??? Return: ??? Note: similar to AX=110Eh SeeAlso: AX=110Eh --------N-2F110E----------------------------- INT 2F CU - NETWORK REDIRECTOR - SET REMOTE FILE'S ATTRIBUTES AX = 110Eh SS = DOS DS SDA first filename pointer -> fully-qualified name of file SDA CDS pointer -> current directory structure for drive with file STACK: WORD new file attributes Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful STACK unchanged Note: this function is called by the DOS 3.1+ kernel SeeAlso: AX=110Dh,AX=110Fh,INT 21/AX=4301h,INT 21/AH=60h --------N-2F110F----------------------------- INT 2F CU - NETWORK REDIRECTOR - GET REMOTE FILE'S ATTRIBUTES AND SIZE AX = 110Fh SS = DOS DS SDA first filename pointer -> fully-qualified name of file SDA CDS pointer -> current directory structure for drive with file Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful AX = file attributes BX:DI = file size Note: this function is called by the DOS 3.1+ kernel SeeAlso: AX=110Eh,INT 21/AX=4300h,INT 21/AH=60h --------N-2F1110----------------------------- INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - GET REMOTE FILE'S ATTRIBUTES AND SIZE AX = 1110h SDA first filename pointer -> name of file ??? Return: ??? Note: appears to be similar to AX=110Fh SeeAlso: AX=110Eh --------N-2F1111----------------------------- INT 2F CU - NETWORK REDIRECTOR - RENAME REMOTE FILE AX = 1111h SS = DS = DOS DS SDA first filename pointer = offset of fully-qualified old name SDA second filename pointer = offset of fully-qualified new name SDA CDS pointer -> current directory structure for drive with file Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful Note: this function is called by the DOS 3.1+ kernel SeeAlso: AX=1112h,INT 21/AH=56h,INT 21/AH=60h --------N-2F1112----------------------------- INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - RENAME REMOTE FILE AX = 1112h SS = DS = DOS DS SDA first filename pointer -> name of file ??? Return: ??? Note: similar to AX=1111h SeeAlso: AX=1111h --------N-2F1113----------------------------- INT 2F CU - NETWORK REDIRECTOR - DELETE REMOTE FILE AX = 1113h SS = DS = DOS DS SDA first filename pointer -> fully-qualified filename in DOS DS SDA CDS pointer -> current directory structure for drive with file Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful Notes: this function is called by the DOS 3.1+ kernel the filespec may contain wildcards SeeAlso: AX=1114h,INT 21/AH=41h,INT 21/AH=60h --------N-2F1114----------------------------- INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - DELETE REMOTE FILE AX = 1114h SDA first filename pointer -> name of file ??? Return: ??? Note: similar to AX=1113h SeeAlso: AX=1113h --------N-2F1115----------------------------- INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - OPEN REMOTE FILE AX = 1115h SS = DOS DS ES:DI -> SFT ??? ??? Return: ??? Note: similar to AX=1116h SeeAlso: AX=1116h,AX=112Eh --------N-2F1116----------------------------- INT 2F CU - NETWORK REDIRECTOR - OPEN EXISTING REMOTE FILE AX = 1116h ES:DI -> uninitialized SFT SS = DOS DS SDA first filename pointer -> fully-qualified name of file to open STACK: WORD file access and sharing modes (see #0627 at INT 21/AH=3Dh) Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful SFT filled (except handle count, which DOS manages itself) STACK unchanged Note: this function is called by the DOS 3.1+ kernel SeeAlso: AX=1106h,AX=1115h,AX=1117h,AX=1118h,AX=112Eh,INT 21/AH=3Dh SeeAlso: INT 21/AH=60h --------N-2F1117----------------------------- INT 2F CU - NETWORK REDIRECTOR - CREATE/TRUNCATE REMOTE FILE AX = 1117h ES:DI -> uninitialized SFT SS = DOS DS SDA first filename pointer -> fully-qualified name of file to open SDA CDS pointer -> current directory structure for drive with file STACK: WORD file creation mode low byte = file attributes (see #0626 at INT 21/AH=3Ch) high byte = 00h normal create, 01h create new file Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful SFT filled (except handle count, which DOS manages itself) STACK unchanged Note: this function is called by the DOS 3.1+ kernel SeeAlso: AX=1106h,AX=1116h,AX=1118h,AX=112Eh,INT 21/AH=3Ch,INT 21/AH=60h --------N-2F1118----------------------------- INT 2F CU - NETWORK REDIRECTOR - CREATE/TRUNCATE FILE WITHOUT CDS AX = 1118h ES:DI -> uninitialized SFT SS = DOS DS SDA first filename pointer -> fully-qualified name of file STACK: WORD file creation mode low byte = file attributes high byte = 00h normal create, 01h create new file Return: ??? STACK unchanged Note: this function is called by the DOS 3.1+ kernel when creating a file on a drive for which the SDA CDS pointer has offset FFFFh SeeAlso: AX=1106h,AX=1116h,AX=1117h,AX=112Eh,INT 21/AH=60h --------N-2F1119----------------------------- INT 2F CU - NETWORK REDIRECTOR - FIND FIRST FILE WITHOUT CDS AX = 1119h SS = DS = DOS DS [DTA] = uninitialized 21-byte findfirst search data (see #0839 at INT 21/AH=4Eh) SDA first filename pointer -> fully-qualified search template SDA search attribute = attribute mask for search Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful [DTA] = updated findfirst search data (bit 7 of first byte must be set) [DTA+15h] = standard directory entry for file Notes: this function is called by the DOS 3.1+ kernel DOS 4.x IFSFUNC returns CF set, AX=0003h SeeAlso: AX=111Ah,AX=111Bh --------N-2F111A----------------------------- INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - FIND NEXT FILE WITHOUT CDS AX = 111Ah ??? Return: CF set AX = error code (03h for DOS 4.01 IFSFUNC) Note: use AX=111Ch for DOS 5+ SeeAlso: AX=1119h,AX=111Ch --------N-2F111B----------------------------- INT 2F CU - NETWORK REDIRECTOR - FINDFIRST AX = 111Bh SS = DS = DOS DS [DTA] = uninitialized 21-byte findfirst search data (see #0839 at INT 21/AH=4Eh) SDA first filename pointer -> fully-qualified search template SDA CDS pointer -> current directory structure for drive with file SDA search attribute = attribute mask for search Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful [DTA] = updated findfirst search data (bit 7 of first byte must be set) [DTA+15h] = standard directory entry for file Note: this function is called by the DOS 3.1+ kernel SeeAlso: AX=1119h,AX=111Ch,INT 21/AH=4Eh,INT 21/AH=60h --------N-2F111C----------------------------- INT 2F CU - NETWORK REDIRECTOR - FINDNEXT AX = 111Ch SS = DS = DOS DS ES:DI -> CDS [DTA] = 21-byte findfirst search data (see #0839 at INT 21/AH=4Eh) Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful [DTA] = updated findfirst search data (bit 7 of first byte must be set) [DTA+15h] = standard directory entry for file Note: this function is called by the DOS 3.1+ kernel SeeAlso: AX=1119h,AX=111Bh,INT 21/AH=4Fh --------N-2F111D----------------------------- INT 2F CU - NETWORK REDIRECTOR - CLOSE ALL REMOTE FILES FOR PROCESS (ABORT) AX = 111Dh SS = DOS DS SDA PSP segment field = PSP of terminating process Return: nothing Notes: used when a process is aborted; the process being terminated is indicated by the "sharing PSP" field in the SDA (offset 1Ah/1Ch) this function is called by the DOS 3.1+ kernel closes all FCBs opened by process SeeAlso: INT 21/AX=5D04h --------N-2F111E----------------------------- INT 2F CU - NETWORK REDIRECTOR - DO REDIRECTION AX = 111Eh SS = DOS DS STACK: WORD function to execute 5F00h get redirection mode BL = type (03h printer, 04h disk) Return: BH = state (00h off, 01h on) 5F01h set redirection mode BL = type (03h printer, 04h disk) BH = state (00h off, 01h on) 5F02h get redirection list entry BX = redirection list index DS:SI -> 16-byte local device name buffer ES:DI -> 128-byte network name buffer Return: must set user's BX to device type and CX to stored parameter value, using AX=1218h to get stack frame address 5F03h redirect device BL = device type (see INT 21/AX=5F03h) CX = stored parameter value DS:SI -> ASCIZ source device name ES:DI -> destination ASCIZ network path + ASCIZ passwd 5F04h cancel redirection DS:SI -> ASCIZ device name or network path 5F05h get redirection list extended entry BX = redirection list index DS:SI -> buffer for ASCIZ source device name ES:DI -> buffer for destination ASCIZ network path Return: BH = status flag BL = type (03h printer, 04h disk) CX = stored parameter value BP = NETBIOS local session number 5F06h similar to 5F05h??? Return: CF set on error AX = error code (see #0885 at INT 21/AH=59h) STACK unchanged Notes: this function is called by the DOS 3.1+ kernel on INT 21/AH=5Fh (including LAN Manager calls) the PC Network 1.00 redirector does not support function 5F06h SeeAlso: INT 21/AX=5F00h,INT 21/AX=5F01h,INT 21/AX=5F02h,INT 21/AX=5F03h SeeAlso: INT 21/AX=5F04h,INT 21/AX=5F05h,INT 21/AX=5F06h --------N-2F111F----------------------------- INT 2F CU - NETWORK REDIRECTOR - PRINTER SETUP AX = 111Fh STACK: WORD function 5E02h set printer setup 5E03h get printer setup 5E04h set printer mode 5E05h get printer mode Return: CF set on error AX = error code (see #0885 at INT 21/AH=59h) STACK unchanged Note: this function is called by the DOS 3.1+ kernel SeeAlso: INT 21/AX=5E02h,INT 21/AX=5E03h,INT 21/AX=5E04h,INT 21/AX=5E05h --------N-2F1120----------------------------- INT 2F CU - NETWORK REDIRECTOR - FLUSH ALL DISK BUFFERS AX = 1120h DS = DOS DS ??? Return: CF clear (successful) Notes: this function is called by the DOS 3.1+ kernel uses CDS array pointer and LASTDRIVE= entries in DOS list of lists SeeAlso: INT 21/AH=0Dh,INT 21/AX=5D01h --------N-2F1121----------------------------- INT 2F CU - NETWORK REDIRECTOR - SEEK FROM END OF REMOTE FILE AX = 1121h CX:DX = offset (in bytes) from end ES:DI -> SFT SFT DPB field -> DPB of drive with file SS = DOS DS Return: CF set on error AL = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful DX:AX = new file position Note: this function is called by the DOS 3.1+ kernel, but only when seeking from the end of a file opened with sharing modes set in such a manner that another process is able to change the size of the file while it is already open SeeAlso: AX=1228h,INT 21/AH=42h --------N-2F1122----------------------------- INT 2F CU - NETWORK REDIRECTOR - PROCESS TERMINATION HOOK AX = 1122h SS = DOS DS DS = PSP of process about to terminate Return: ??? Notes: this function is called by the DOS 3.1+ kernel after calling this function, the kernel calls INT 2F/AX=111Dh SeeAlso: AX=111Dh,INT 21/AH=4Ch,INT 60/DI=0601h --------N-2F1123----------------------------- INT 2F CU - NETWORK REDIRECTOR - QUALIFY REMOTE FILENAME AX = 1123h DS:SI -> ASCIZ filename to canonicalize ES:DI -> 128-byte buffer for qualified name Return: CF set if not resolved Notes: called by MS-DOS 3.1+ kernel, but not called by DR-DOS 5.0 unless the filename matches the name of a character device called first when DOS attempts to resolve a filename (unless inside an AX=5D00h server call); if this fails, DOS resolves the name locally SeeAlso: AX=1221h,INT 21/AH=60h --------N-2F1124----------------------------- INT 2F CU - NETWORK REDIRECTOR - TURN OFF REMOTE PRINTER AX = 1124h ES:DI -> SFT SS = DOS DS ??? Return: CX = ??? Note: this function is called by the DOS 3.1+ kernel if AX=1126h returns CF set SeeAlso: AX=1126h --------N-2F1125----------------------------- INT 2F CU - NETWORK REDIRECTOR - REDIRECTED PRINTER MODE AX = 1125h STACK: WORD subfunction 5D07h get print stream state Return: DL = current state 5D08h set print stream state DL = new state 5D09h finish print job Return: CF set on error AX = error code (see #0885 at INT 21/AH=59h) STACK unchanged Note: this function is called by the DOS 3.1+ kernel SeeAlso: INT 21/AX=5D07h,INT 21/AX=5D08h,INT 21/AX=5D09h --------N-2F1126----------------------------- INT 2F CU - NETWORK REDIRECTOR - REMOTE PRINTER ECHO ON/OFF AX = 1126h ES:DI -> SFT for file handle 4??? SS = DOS DS??? ??? Return: CF set on error Notes: this function is called by the DOS 3.1+ kernel called when print echoing (^P, ^PrtSc) changes state and STDPRN has bit 11 of the device information word in the SFT set SeeAlso: AX=1124h --------N-2F1127----------------------------- INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - UNUSED AX = 1127h Return: CF set AX = 0001h (invalid function) (see #0885 at INT 21/AH=59h) --------N-2F1128----------------------------- INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - UNUSED AX = 1128h Return: CF set AX = 0001h (invalid function) (see #0885 at INT 21/AH=59h) --------N-2F1129----------------------------- INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - UNUSED AX = 1129h Return: CF set AX = 0001h (invalid function) (see #0885 at INT 21/AH=59h) --------N-2F112A----------------------------- INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - CLOSE ALL FILES FOR PROCESS AX = 112Ah DS = DOS DS ??? Return: ??? Note: does something to each IFS driver --------N-2F112B----------------------------- INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - GENERIC IOCTL AX = 112Bh SS = DOS DS CX = function/category DS:DX -> parameter block STACK: WORD value of AX on entry to INT 21 (440Ch or 440Dh) ??? Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful Note: this function is called by the DOS 4.0 kernel --------N-2F112C----------------------------- INT 2F CU - NETWORK REDIRECTOR (DOS 4+) - "UPDATE_CB" - ??? AX = 112Ch SS = DOS DS SDA current SFT pointer -> SFT for file ??? Return: CF set on error Note: called by SHARE in DOS 5.0-6.0 --------N-2F112D----------------------------- INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - EXTENDED ATTRIBUTES AX = 112Dh BL = subfunction (value of AL on INT 21) 02h get extended attributes 03h get extended attribute properties 04h set extended attributes Return: CF clear else ??? Return: CX = ??? (00h or 02h for DOS 4.01) ES:DI -> SFT for file SS = DOS DS Return: DS = DOS DS Note: this function is called by the DOS 4.0 kernel on INT 21/AX=5702h, INT 21/AX=5703h, and INT 21/AX=5704h SeeAlso: INT 21/AX=5702h,INT 21/AX=5703h,INT 21/AX=5704h,INT 21/AH=6Eh --------N-2F112E----------------------------- INT 2F CU - NETWORK REDIRECTOR (DOS 4+) - EXTENDED OPEN/CREATE FILE AX = 112Eh SS = DS = DOS DS ES:DI -> uninitialized SFT for file STACK: WORD file attribute for created/truncated file low byte = file attributes high byte = 00h normal create/open, 01h create new file SDA first filename pointer -> fully-qualified filename SDA extended file open action = action code (see #0966 at INT 21/AX=6C00h) SDA extended file open mode = open mode for file (see INT 21/AX=6C00h) Return: CF set on error AX = error code CF clear if successful CX = result code 01h file opened 02h file created 03h file replaced (truncated) SFT initialized (except handle count, which DOS manages itself) Note: this function is called by the DOS 4+ kernel BUG: this function is not called correctly under some DOS versions (at least 5.0 and 6.2): the file attribute on the stack is not correct if the action code is 11h, the result code in CX is not passed back to the application. SeeAlso: AX=1115h,AX=1116h,AX=1117h,INT 21/AX=6C00h --------N-2F112F----------------------------- INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - IFS IOCTL AX = 112Fh SS = DOS DS STACK: WORD function in low byte 00h ??? DS:SI -> Current Directory Structure??? CL = drive (1=A:) 01h ??? DS:SI -> ??? CL = file handle??? 02h ??? DS:SI -> Current Directory Structure??? DI = ??? CX = drive (1=A:) ??? Return: CF set on error AX = DOS error code (see #0885 at INT 21/AH=59h) CF clear if successful Note: this function is called by the DOS 4.0 kernel SeeAlso: INT 21/AH=6Bh --------N-2F1130----------------------------- INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - GET IFSFUNC SEGMENT AX = 1130h Return: ES = CS of resident IFSFUNC --------N-2F1180----------------------------- INT 2F - LAN Manager Enhanced DOS Services - ??? AX = 1180h ??? Return: ??? --------N-2F1182----------------------------- INT 2F - LAN Manager Enhanced DOS Services - INSTALL SERVICE AX = 1182h ??? Return: ??? --------N-2F1184----------------------------- INT 2F - LAN Manager Enhanced DOS - ??? AX = 1184h ??? Return: ??? --------N-2F1186----------------------------- INT 2F - LAN Manager Enhanced DOS - DosReadAsynchNmPipe AX = 1186h DS:SI -> stack frame (see #1392) Return: CF clear if successful CF set if error AX = error code Note: LAN Manager enhance mode adds features beyond the standard redirector file/printer services SeeAlso: AX=118Fh,AX=1190h,AX=1191h,INT 21/AX=5F39h Format of LAN Manager DosReadAsynchNmPipe stack frame: Offset Size Description (Table 1392) 00h DWORD -> number of bytes read 04h WORD size of buffer 06h DWORD -> buffer 0Ah DWORD -> return code 0Eh DWORD function to call on completion as function( char far *buffer ) 12h WORD handle --------N-2F118A----------------------------- INT 2F - LAN Manager 2.0+ DOS Enhanced ENCRYPT.EXE - STREAM ENCRYPTION SERVICE AX = 118Ah BX = function (0000h or 0001h) Return: CF clear if successful AX = 1100h success CF set if error AX = 0001h, etc. SeeAlso: AX=1186h,AH=41h,AH=42h,AH=4Bh --------N-2F118B----------------------------- INT 2F - LAN Manager Enhanced DOS - ??? AX = 118Bh ??? Return: ??? --------N-2F118C----------------------------- INT 2F - LAN Manager Enhanced DOS - ??? AX = 118Ch ??? Return: ??? --------N-2F118E----------------------------- INT 2F - LAN Manager Enhanced DOS - ??? AX = 118Eh ??? Return: ??? --------N-2F118F----------------------------- INT 2F - LAN Manager Enhanced DOS - DosWriteAsynchNmPipe AX = 118Fh DS:SI -> stack frame (see #1393) Return: CF clear if successful CF set if error AX = error code SeeAlso: AX=1186h,AX=1191h,INT 21/AX=5F3Ah Format of LAN Manager DosReadAsynchNmPipe stack frame: Offset Size Description (Table 1393) 00h DWORD -> number of bytes read 04h WORD Size of buffer 06h DWORD -> buffer 0Ah DWORD -> return code 0Eh DWORD function to call on completion as function( char far *buffer ) 12h WORD handle --------N-2F1190----------------------------- INT 2F - LAN Manager Enhanced DOS - DosReadAsynchNmPipe2 AX = 1190h DS:SI -> stack frame (see #1394) Return: CF clear if successful CF set if error AX = error code SeeAlso: AX=1186h,AX=1191h Format of LAN Manager DosReadAsynchNmPipe2 stack frame: Offset Size Description (Table 1394) 00h DWORD -> number of bytes read 04h WORD size of buffer 06h DWORD -> buffer 0Ah DWORD -> return code 0Eh DWORD function to call on completion as function( char far *buffer ) 12h WORD handle 14h DWORD ??? --------N-2F1191----------------------------- INT 2F - LAN Manager Enhanced DOS - DosWriteAsynchNmPipe2 AX = 1191h DS:SI -> stack frame (see #1395) Return: CF clear if successful CF set if error AX = error code SeeAlso: AX=118Fh,AX=1190h,INT 21/AX=5F3Ah Format of LAN Manager DosReadAsynchNmPipe2 stack frame: Offset Size Description (Table 1395) 00h DWORD -> number of bytes read 04h WORD size of buffer 06h DWORD -> buffer 0Ah DWORD -> return code 0Eh DWORD function to call on completion as function( char far *buffer ) 12h WORD handle 14h DWORD ??? --------D-2F1200----------------------------- INT 2F U - DOS 3+ internal - INSTALLATION CHECK AX = 1200h Return: AL = FFh (for compatibility with other INT 2F functions) --------D-2F1201----------------------------- INT 2F U - DOS 3+ internal - CLOSE CURRENT FILE AX = 1201h SS = DOS DS (must be using a DOS internal stack) SDA current SFT pointer -> SFT of file to close Return: CF set on error BX??? CX new reference count of SFT ES:DI -> SFT for file SeeAlso: AX=1106h,AX=1227h,INT 21/AH=3Eh --------D-2F1202----------------------------- INT 2F U - DOS 3+ internal - GET INTERRUPT ADDRESS AX = 1202h STACK: WORD vector number Return: ES:BX -> interrupt vector STACK unchanged --------D-2F1203----------------------------- INT 2F U - DOS 3+ internal - GET DOS DATA SEGMENT AX = 1203h Return: DS = data segment of IBMDOS.COM/MSDOS.SYS Note: for DOS prior to version 5.0, the data segment is the same as the code segment --------D-2F1204----------------------------- INT 2F U - DOS 3+ internal - NORMALIZE PATH SEPARATOR AX = 1204h STACK: WORD character to normalize Return: AL = normalized character (forward slash turned to backslash, all others unchanged) ZF set if path separator STACK unchanged --------D-2F1205----------------------------- INT 2F U - DOS 3+ internal - OUTPUT CHARACTER TO STANDARD OUTPUT AX = 1205h STACK: WORD character to output Return: STACK unchanged Note: can be called only from within DOS --------D-2F1206----------------------------- INT 2F U - DOS 3+ internal - INVOKE CRITICAL ERROR AX = 1206h DI = error code BP:SI -> device driver header SS = DOS DS (must be using a DOS internal stack) STACK: WORD value to be passed to INT 24 in AX Return: AL = 0-3 for Abort, Retry, Ignore, Fail STACK unchanged SeeAlso: INT 24 --------D-2F1207----------------------------- INT 2F U - DOS 3+ internal - MAKE DISK BUFFER MOST-RECENTLY USED AX = 1207h DS:DI -> disk buffer Return: nothing Desc: move the indicated buffer to the end of the disk buffer chain (least- recently used is first); under DOS 3.3, the buffer is then moved to the start of the disk buffer chain if it was marked unused Notes: can be called only from within DOS this function is nearly the same as AX=120Fh SeeAlso: AX=120Fh --------D-2F1208----------------------------- INT 2F U - DOS 3+ internal - DECREMENT SFT REFERENCE COUNT AX = 1208h ES:DI -> SFT Return: AX = original value of reference count Notes: if the reference count was 1, it is set to FFFFh (since 0 indicates that the SFT is not in use). It is the caller's responsibility to set the reference count to zero after cleaning up. used by network redirectors such as MSCDEX SeeAlso: AX=1106h --------D-2F1209----------------------------- INT 2F U - DOS 3+ internal - FLUSH AND FREE DISK BUFFER AX = 1209h DS:DI -> disk buffer Return: disk buffer marked unused, contents written to disk if buffer dirty Note: can be called only from within DOS SeeAlso: AX=120Eh,AX=1215h --------D-2F120A----------------------------- INT 2F U - DOS 3+ internal - PERFORM CRITICAL ERROR INTERRUPT AX = 120Ah DS = SS = DOS DS (must be using a DOS internal stack) STACK: WORD extended error code Return: AL = user response (0=ignore, 1=retry, 2=abort, 3=fail) CF clear if retry, set otherwise STACK unchanged Notes: can only be called during a DOS function call, as it uses various fields in the SDA to set up the registers for the INT 24 reportedly sets current DPB's first root directory sector to 1 SeeAlso: INT 24 --------D-2F120B----------------------------- INT 2F U - DOS 3+ internal - SIGNAL SHARING VIOLATION TO USER AX = 120Bh ES:DI -> system file table entry for previous open of file STACK: WORD extended error code (should be 20h--sharing violation) Return: CF clear if operation should be retried CF set if operation should not be retried AX = error code (20h) (see #0885 at INT 21/AH=59h) STACK unchanged Notes: can only be called during a DOS function call should only be called if an attempt was made to open an already-open file contrary to the sharing rules invokes INT 24 if SFT file opened via FCB or in compatibility mode with inheritance allowed --------D-2F120C----------------------------- INT 2F U - DOS 3+ internal - OPEN DEVICE AND SET SFT OWNER/MODE AX = 120Ch SDA current SFT pointer -> SFT for file DS = DOS DS SS = DOS DS (must be using a DOS internal stack) Return: ES, DI, AX destroyed Notes: invokes "device open" call on device driver for SFT changes owner of last-accessed SFT to calling process if it was opened via FCB called by network redirectors such as MSCDEX --------D-2F120D----------------------------- INT 2F U - DOS 3+ internal - GET DATE AND TIME AX = 120Dh SS = DOS DS (must be using a DOS internal stack) Return: AX = current date in packed format (see #0877 at INT 21/AX=5700h) DX = current time in packed format (see #0876 at INT 21/AX=5700h) SeeAlso: INT 21/AH=2Ah,INT 21/AH=2Ch --------D-2F120E----------------------------- INT 2F U - DOS 3+ internal - MARK ALL DISK BUFFERS UNREFERENCED AX = 120Eh SS = DOS DS (must be using a DOS internal stack) Return: DS:DI -> first disk buffer Notes: clears "referenced" flag on all disk buffers in DOS 5+, this has become essentially a NOP, invoking the same code used by AX=1224h (SHARING DELAY) SeeAlso: AX=1209h,AX=1210h,INT 21/AH=0Dh --------D-2F120F----------------------------- INT 2F U - DOS 3+ internal - MAKE BUFFER MOST RECENTLY USED AX = 120Fh DS:DI -> disk buffer SS = DOS DS (must be using a DOS internal stack) Return: DS:DI -> next buffer in buffer list Desc: move the indicated buffer to the end of the disk buffer chain (least- recently used is first); under DOS 3.3, the buffer is then moved to the start of the disk buffer chain if it was marked unused Note: this function is the same as AX=1207h except that it returns a pointer to the buffer following the specified buffer in the buffer chain SeeAlso: AX=1207h --------D-2F1210----------------------------- INT 2F U - DOS 3+ internal - FIND UNREFERENCED DISK BUFFER AX = 1210h DS:DI -> first disk buffer to check Return: ZF clear if found DS:DI -> first unreferenced disk buffer ZF set if not found Note: in DOS 5+, this has become essentially a NOP, invoking the same code used by AX=1224h (SHARING DELAY) SeeAlso: AX=120Eh --------D-2F1211----------------------------- INT 2F U - DOS 3+ internal - NORMALIZE ASCIZ FILENAME AX = 1211h DS:SI -> ASCIZ filename to normalize ES:DI -> buffer for normalized filename Return: destination buffer filled with uppercase filename, with slashes turned to backslashes SeeAlso: AX=121Eh,AX=1221h --------D-2F1212----------------------------- INT 2F U - DOS 3+ internal - GET LENGTH OF ASCIZ STRING AX = 1212h ES:DI -> ASCIZ string Return: CX = length of string SeeAlso: AX=1225h --------D-2F1213----------------------------- INT 2F U - DOS 3+ internal - UPPERCASE CHARACTER AX = 1213h STACK: WORD character to convert to uppercase Return: AL = uppercase character STACK unchanged --------D-2F1214----------------------------- INT 2F U - DOS 3+ internal - COMPARE FAR POINTERS AX = 1214h DS:SI = first pointer ES:DI = second pointer Return: ZF set if pointers are equal, ZF clear if not equal --------D-2F1215----------------------------- INT 2F U - DOS 3+ internal - FLUSH BUFFER AX = 1215h DS:DI -> disk buffer SS = DOS DS (must be using a DOS internal stack) STACK: WORD drives for which to skip buffer ignore buffer if drive same as high byte, or bytes differ and the buffer is for a drive OTHER than that given in low byte Return: STACK unchanged Note: can be called only from within DOS SeeAlso: AX=1209h --------D-2F1216----------------------------- INT 2F U - DOS 3+ internal - GET ADDRESS OF SYSTEM FILE TABLE ENTRY AX = 1216h BX = system file table entry number Return: CF clear if successful ES:DI -> system file table entry CF set if BX greater than FILES= Note: supported by DR-DOS 5+ SeeAlso: AX=1220h --------D-2F1217----------------------------- INT 2F U - DOS 3+ internal - GET CURRENT DIRECTORY STRUCTURE FOR DRIVE AX = 1217h SS = DOS DS (must be using a DOS internal stack) STACK: WORD drive (0 = A:, 1 = B:, etc) Return: CF set on error (drive > LASTDRIVE) CF clear if successful DS:SI -> current directory structure for specified drive STACK unchanged SeeAlso: AX=1219h --------D-2F1218----------------------------- INT 2F U - DOS 3+ internal - GET CALLER'S REGISTERS AX = 1218h Return: DS:SI -> saved caller's AX,BX,CX,DX,SI,DI,BP,DS,ES (on stack) Note: only valid while within DOS --------D-2F1219----------------------------- INT 2F U - DOS 3+ internal - SET DRIVE??? AX = 1219h SS = DOS DS (must be using a DOS internal stack) STACK: WORD drive (0 = default, 1 = A:, etc) Return: ??? STACK unchanged Notes: calls AX=1217h builds a current directory structure if inside server call (INT 21/AX=5D00h) SeeAlso: AX=1217h,AX=121Fh --------D-2F121A----------------------------- INT 2F U - DOS 3+ internal - GET FILE'S DRIVE AX = 121Ah DS:SI -> filename Return: AL = drive (0 = default, 1 = A:, etc, FFh = invalid) DS:SI -> filename without leading X: (if present) SeeAlso: INT 21/AH=19h,INT 21/AH=60h --------D-2F121B----------------------------- INT 2F U - DOS 3+ internal - SET YEAR/LENGTH OF FEBRUARY AX = 121Bh CL = year - 1980 Return: AL = number of days in February Note: requires DS to be set to the DOS data segment SeeAlso: INT 21/AH=2Bh --------D-2F121C----------------------------- INT 2F U - DOS 3+ internal - CHECKSUM MEMORY AX = 121Ch DS:SI -> start of memory to checksum CX = number of bytes DX = initial checksum SS = DOS DS (must be using a DOS internal stack) Return: AX, CX destroyed DX = checksum DS:SI -> first byte after checksummed range Notes: used by DOS to determine day count since 1/1/80 given a date supported by DR-DOS 5.0+ SeeAlso: AX=121Dh --------D-2F121D----------------------------- INT 2F U - DOS 3+ internal - SUM MEMORY AX = 121Dh DS:SI -> memory to add up CX = 0000h DX = limit Return: AL = byte which exceeded limit CX = number of bytes before limit exceeded DX = remainder after adding first CX bytes DS:SI -> byte beyond the one which exceeded the limit Notes: used by DOS to determine year or month given day count since 1/1/80 supported by DR-DOS 5.0+ SeeAlso: AX=121Ch --------D-2F121E----------------------------- INT 2F U - DOS 3+ internal - COMPARE FILENAMES AX = 121Eh DS:SI -> first ASCIZ filename ES:DI -> second ASCIZ filename Return: ZF set if filenames equivalent, ZF clear if not Note: supported by DR-DOS 5.0+ SeeAlso: AX=1211h,AX=1221h --------D-2F121F----------------------------- INT 2F U - DOS 3+ internal - BUILD CURRENT DIRECTORY STRUCTURE AX = 121Fh SS = DOS DS (must be using a DOS internal stack) STACK: WORD drive letter Return: ES:DI -> current directory structure (will be overwritten by next call) STACK unchanged --------D-2F1220----------------------------- INT 2F U - DOS 3+ internal - GET JOB FILE TABLE ENTRY AX = 1220h BX = file handle Return: CF set on error AL = 6 (invalid file handle) CF clear if successful ES:DI -> JFT entry for file handle in current process Notes: the byte pointed at by ES:DI contains the number of the SFT for the file handle, or FFh if the handle is not open supported by DR-DOS 5.0+ SeeAlso: AX=1216h,AX=1229h --------D-2F1221----------------------------- INT 2F U - DOS 3+ internal - CANONICALIZE FILE NAME AX = 1221h DS:SI -> file name to be fully qualified ES:DI -> 128-byte buffer for resulting canonical file name SS = DOS DS (must be using a DOS internal stack) Return: (see INT 21/AH=60h) Note: identical to INT 21/AH=60h SeeAlso: AX=1123h,INT 21/AH=60h --------D-2F1222----------------------------- INT 2F U - DOS 3+ internal - SET EXTENDED ERROR INFO AX = 1222h SS = DOS data segment SS:SI -> 4-byte records BYTE error code, FFh = last record BYTE error class, FFh = don't change BYTE suggested action, FFh = don't change BYTE error locus, FFh = don't change SDA error code set Return: SI destroyed SDA error class, error locus, and suggested action fields set Note: can be called only from within DOS SeeAlso: AX=122Dh,INT 21/AH=59h,INT 21/AX=5D0Ah --------D-2F1223----------------------------- INT 2F U - DOS 3+ internal - CHECK IF CHARACTER DEVICE AX = 1223h DS = DOS DS SS = DOS DS (must be using a DOS internal stack) SDA+218h (DOS 3.10-3.30) = eight-character blank-padded name SDA+22Bh (DOS 4.0-6.0) = eight-character blank-padded name Return: CF set if no character device by that name found CF clear if found BH = low byte of device attribute word Note: can only be called from within DOS SeeAlso: INT 21/AX=5D06h,INT 21/AX=5D0Bh --------D-2F1224----------------------------- INT 2F U - DOS 3+ internal - SHARING RETRY DELAY AX = 1224h SS = DOS DS (must be using a DOS internal stack) Return: after delay set by INT 21/AX=440Bh, unless in server call (INT 21/AX=5D00h) Note: delay is dependent on the processor speed, and is skipped entirely if inside a server call SeeAlso: INT 21/AX=440Bh,INT 21/AH=52h,INT 62/AX=0097h --------D-2F1225----------------------------- INT 2F U - DOS 3+ internal - GET LENGTH OF ASCIZ STRING AX = 1225h DS:SI -> ASCIZ string Return: CX = length of string Note: supported by DR-DOS 5.0+ SeeAlso: AX=1212h --------D-2F1226----------------------------- INT 2F U - DOS 3.3+ internal - OPEN FILE AX = 1226h CL = access mode DS:DX -> ASCIZ filename SS = DOS DS (must be using a DOS internal stack) Return: CF set on error AL = error code (see #0885 at INT 21/AH=59h) CF clear if successful AX = file handle Notes: can only be called from within DOS equivalent to INT 21/AH=3Dh used by NLSFUNC to access COUNTRY.SYS when invoked by the DOS kernel SeeAlso: AX=1227h,INT 21/AH=3Dh --------D-2F1227----------------------------- INT 2F U - DOS 3.3+ internal - CLOSE FILE AX = 1227h BX = file handle SS = DOS DS (must be using a DOS internal stack) Return: CF set on error AL = 06h invalid file handle CF clear if successful Notes: can only be called from within DOS equivalent to INT 21/AH=3Eh used by NLSFUNC to access COUNTRY.SYS when invoked by the DOS kernel SeeAlso: AX=1106h,AX=1201h,AX=1226h,INT 21/AH=3Eh --------D-2F1228BP4200----------------------- INT 2F U - DOS 3.3+ internal - MOVE FILE POINTER AX = 1228h BP = 4200h, 4201h, 4202h (see INT 21/AH=42h) BX = file handle CX:DX = offset in bytes SS = DOS DS (must be using a DOS internal stack) Return: as for INT 21/AH=42h Notes: equivalent to INT 21/AH=42h, but may only be called from inside a DOS function call sets user stack frame pointer to dummy buffer, moves BP to AX, performs LSEEK, and restores frame pointer used by NLSFUNC to access COUNTRY.SYS when invoked by the DOS kernel SeeAlso: INT 21/AH=42h --------D-2F1229----------------------------- INT 2F U - DOS 3.3+ internal - READ FROM FILE AX = 1229h BX = file handle CX = number of bytes to read DS:DX -> buffer SS = DOS DS (must be using a DOS internal stack) Return: as for INT 21/AH=3Fh Notes: equivalent to INT 21/AH=3Fh, but may only be called when already inside a DOS function call used by NLSFUNC to access COUNTRY.SYS when invoked by the DOS kernel SeeAlso: AX=1226h,INT 21/AH=3Fh --------D-2F122A----------------------------- INT 2F U - DOS 3.3+ internal - SET FASTOPEN ENTRY POINT AX = 122Ah BX = entry point to set (0001h or 0002h) DS:SI -> FASTOPEN entry point (see #1396,#1397) (entry point not set if SI = FFFFh for DOS 4+) Return: CF set if specified entry point already set Notes: entry point in BX is ignored under DOS 3.30 both entry points set to same handler by DOS 4.01 DOS 5.0 and 6.0 only set entry point 1 (Table 1396) Values DOS 3.30+ FASTOPEN entry point is called with: AL = 01h Lookup CX = ??? seems to be offset DI = ??? seems to be offset SI = offset in DOS DS of filename AL = 02h insert file into FASTOPEN cache AL = 03h delete file from FASTOPEN cache SI = offset in DOS DS of filename AL = 04h purge FASTOPEN cache AH = subfunction (00h,01h,02h) ES:DI -> ??? CX = ??? (subfunctions 01h and 02h only) Returns: CF set on error or not installed Note: function 03h calls function 01h first SeeAlso: #1397,#1398 (Table 1397) Values PC-DOS 4.01 FASTOPEN is additionally called with: AL = 04h ??? AH = 03h ??? AL = 05h ??? AL = 0Bh ??? AL = 0Ch ??? AL = 0Dh ??? AL = 0Eh ??? AL = 0Fh ??? AL = 10h ??? SeeAlso: #1396,#1398 (Table 1398) Values MS-DOS 5.0-6.0 FASTOPEN is additionally called with: AL = 04h purge FASTOPEN cache AH = 03h ??? AL = 05h ??? DL = drive (00h = A:) ??? AL = 06h ??? ??? SeeAlso: #1396,#1397 --------D-2F122B----------------------------- INT 2F U - DOS 3.3+ internal - IOCTL AX = 122Bh BP = 44xxh SS = DOS DS (must be using a DOS internal stack) additional registers as appropriate for INT 21/AX=44xxh Return: as for INT 21/AH=44h Notes: equivalent to INT 21/AH=44h, but may only be called when already inside a DOS function call sets user stack frame pointer to dummy buffer, moves BP to AX, performs IOCTL, and restores frame pointer used by NLSFUNC in accessing COUNTRY.SYS when invoked by the DOS kernel SeeAlso: INT 21/AH=44h --------D-2F122C----------------------------- INT 2F U - DOS 3.3+ internal - GET DEVICE CHAIN AX = 122Ch Return: BX:AX -> header of second device driver (NUL is first) in driver chain Note: although this function exists in DR-DOS 5.0 and Novell DOS 7, it always returns 0000h:0000h SeeAlso: INT 21/AH=52h --------D-2F122D----------------------------- INT 2F U - DOS 3.3+ internal - GET EXTENDED ERROR CODE AX = 122Dh Return: AX = current extended error code SeeAlso: AX=1222h,INT 21/AH=59h --------D-2F122E----------------------------- INT 2F U - DOS 4+ internal - GET OR SET ERROR TABLE ADDRESSES AX = 122Eh DL = subfunction 00h get standard DOS error table (see #1399) Return: ES:DI -> error table (DOS 4: errors 00h-12h,50h-5Bh) (DOS 5: errors 00h-26h,4Fh,51h-59h) 01h set standard DOS error table ES:DI -> error table 02h get parameter error table (errors 00h-0Ah) Return: ES:DI -> error table 03h set parameter error table ES:DI -> error table 04h get critical/SHARE error table (errors 13h-2Bh) Return: ES:DI -> error table 05h set critical/SHARE error table ES:DI -> error table 06h get ??? error table Return: ES:DI -> error table or 0000h:0000h 07h set ??? error table ES:DI -> error table 08h get error message retriever (see #1400) Return: ES:DI -> FAR procedure to fetch error message 09h set ??? error table ES:DI -> error table Notes: if the returned segment on a "get" is 0001h, then the offset specifies the offset of the error message table within COMMAND.COM, and the procedure returned by DL=08h should be called DOS 5+ COMMAND.COM does not allow setting any of the addresses (calls with DL odd are ignored); they are always returned with segment 0001h for DOS 5.0, the standard and critical/SHARE error tables are combined into a single error table SeeAlso: AX=0500h,INT 21/AH=59h Format of DOS 4.x error table: Offset Size Description (Table 1399) 00h BYTE FFh 01h 2 BYTEs 04h,00h (DOS version???) 03h BYTE number of error headers following 04h 2N WORDs table of all error headers for table Offset Size Description 00h WORD error message number 02h WORD offset of error message from start of header error messages are count byte followed by msg Note: DOS 5 error tables consist of one word per error number; each word contains either the offset of a counted string or 0000h (Table 1400) Call error retrieval function with: AX = error number (see #1401) DI = offset of error table Return: ES:DI -> error message (counted string) Notes: this function needs to access COMMAND.COM if the messages were not loaded into memory permanently with /MSG; the caller should assume that the returned message will be overwritten by the next call of the function supported by DR-DOS 5.0 (Table 1401) Values for parameter errors: 01h Too many parameters 02h Required Parameter missing 03h Invalid switch 04h Invalid keyword 06h Parameter value not in allowed range 07h Parameter value not allowed 08h Parameter value not allowed 09h Parameter format not correct 0Ah Invalid parameter 0Bh Invalid parameter combination --------D-2F122F----------------------------- INT 2F U - DOS 4.x internal - SET DOS VERSION NUMBER TO RETURN AX = 122Fh DX = DOS version number (0000h = return true DOS version) Note: not available under DR-DOS 5.0 or 6.0 SeeAlso: INT 21/AH=30h,INT 21/AX=3306h --------m-2F12FFBX0006----------------------- INT 2F U - DR-DOS 6, Novell DOS 7 - EMM386.EXE - VIDEO MEMORY SPACE CONTROL AX = 12FFh BX = 0006h DX = 0000h CX = function 0000h get status of video memory space (MEMMAX /V) 0001h map memory into video memory space (MEMMAX +V) 0002h unmap memory from video memory space (MEMMAX -V) Return: CF clear if successful AX = 0000h (successful) BX = segment of reserved video RAM CX = segment of used video RAM DX = segment of first upper MCB Notes: this functionality is provided by EMM386, and partially supported by HIDOS.SYS BL specifies which program handles the call, BH is the function number SeeAlso: AX=D201h/BX=4849h --------O-2F12FFBX0007----------------------- INT 2F U - Novell DOS 7 - SCRIPT.EXE - GET ??? AX = 12FFh BX = 0007h CX = 0000h Return: CF clear if installed AX = 0000h BX = ??? (4426h) CX = ??? (0068h) DX = PSP segment of resident code??? SI = ??? (4AFAh) ES = resident code segment --------m-2F12FFBX0106----------------------- INT 2F U - Novell DOS 7 - EMM386.EXE - GET VERSION??? AX = 12FFh BX = 0106h Return: CF clear if successful AX = 0000h (successful) BX = EDC0h (signature) CL = memory manager variant (02h,03h) (02h when DPMI/VCPI disabled, 03h when DPMI/VCPI loaded) CH = ??? (00h) DX = version??? (0300h for v3.0) ES = segment of EMM386 low-memory stub Notes: BL specifies which program handles the call, BH is the function number if the word at ES:0012h is nonzero, if contains the offset within segment ES of the CEMM-compatible entry point (see #1402) if no other program has hooked INT 67, an alternate installation check is to test for the string "NOVELL EXPANDED MEMORY MANAGER 386" at offset 14h in the INT 67 handler's segment; the word immediately preceding this string contains the offset of the API entry point if it is nonzero Index: entry point;Novell EMM386 (Table 1402) Call Novell EMM386.EXE entry point with: AH = 00h get memory manager's status??? ??? AH = 01h set memory manager's status??? ??? AH = 02h Weitek coprocessor support??? AL = subfunction??? more functions??? SeeAlso: #0733 at INT 21/AX=4402h/SF=02h,#2271 at INT 67/AX=FFA5h --------m-2F12FFBL06------------------------- INT 2F U - Novell DOS 7 - EMM386.EXE - ??? AX = 12FFh BL = 06h BH = function (02h-09h) ??? Return: ??? --------O-2F12FFBX0EDC----------------------- INT 2F U - Novell DOS 7 - EMM386.EXE - CHECK IF MULTITASKING SUPPORT LOADED??? AX = 12FFh BX = 0EDCh Return: AX = 0000h if ??? loaded CF clear BX = 0000h Notes: called by Novell DOS 7 TaskMgr if this function returns with AX=0000h, then the code necessary to support the API on INT 2F/AX=2780h is loaded and that API becomes available for use because the request is handled on the initial trap to the memory manager caused by INT instructions, this function must be invoked with an actual INT 2F instruction instead of some simulation such as a far call to the address in the interrupt vector table SeeAlso: AX=2780h/CL=01h,AX=2780h/CL=02h,AX=2780h/CL=03h,AX=2780h/CL=04h --------D-2F13------------------------------- INT 2F U - DOS 3.2+ - SET DISK INTERRUPT HANDLER AH = 13h DS:DX -> interrupt handler disk driver calls on read/write ES:BX = address to restore INT 13 to on system halt (exit from root shell) or warm boot (INT 19) Return: DS:DX set by previous invocation of this function ES:BX set by previous invocation of this function Notes: IO.SYS hooks INT 13 and inserts one or more filters ahead of the original INT 13 handler. The first is for disk change detection on floppy drives, the second is for tracking formatting calls and correcting DMA boundary errors, the third is for working around problems in a particular version of IBM's ROM BIOS before the first call, ES:BX points at the original BIOS INT 13; DS:DX also points there unless IO.SYS has installed a special filter for hard disk reads (on systems with model byte FCh and BIOS date "01/10/84" only), in which case it points at the special filter most DOS 3.2+ disk access is via the vector in DS:DX, although a few functions are still invoked via an INT 13 instruction this is a dangerous security loophole for any virus-monitoring software which does not trap this call ("INT13", "Nomenklatura", and many Bulgarian viruses are known to use it to get the original ROM entry point) SeeAlso: INT 13/AH=01h,INT 19,INT 9D"VIRUS" --------N-2F13------------------------------- INT 2F U - MS-NET - ??? AH = 13h ??? Return: ??? Note: supposedly used to move (or control the movement of) NCBs --------U-2F1400----------------------------- INT 2F C - NLSFUNC.COM - INSTALLATION CHECK AX = 1400h Return: AL = 00h not installed, OK to install 01h not installed, not OK FFh installed Notes: this function is called by the DOS v3.3+ kernel supported by OS/2 v1.3+ compatibility box, which always returns AL=FFh supported by DR-DOS 5.0 documented for MS-DOS 5+, but undocumented in prior versions SeeAlso: AX=1401h"NLSFUNC",AX=1402h"NLSFUNC" --------D-2F1400----------------------------- INT 2F - European MS-DOS 4.0 POPUP - "CheckPu" - INSTALLATION CHECK AX = 1400h Return: AX = FFFFh if installed BX = maximum memory required to save screen and keyboard info CF clear if successful CF set on error AX = error code 0002h invalid function 0004h unknown error Note: the POPUP interface is used by background programs (see INT 21/AH=80h) to communicate with the user SeeAlso: AX=1401h"POPUP",AX=1402h"POPUP",AX=1403h"POPUP" --------U-2F1401----------------------------- INT 2F CU - NLSFUNC.COM - CHANGE CODE PAGE AX = 1401h DS:SI -> internal code page structure (see #1403) BX = new code page (see #0962 at INT 21/AX=6602h) DX = country code??? Return: AL = status 00h successful else DOS error code Note: this function is called by the DOS v3.3+ kernel SeeAlso: AX=1400h"NLSFUNC",AX=1402h"NLSFUNC",INT 21/AH=66h Format of DOS 3.30 internal code page structure: Offset Size Description (Table 1403) 00h 8 BYTEs ??? 08h 64 BYTEs name of country information file 48h WORD system code page 4Ah WORD number of supported subfunctions 4Ch 5 BYTEs data to return for INT 21/AX=6502h 51h 5 BYTEs data to return for INT 21/AX=6504h 56h 5 BYTEs data to return for INT 21/AX=6505h 5Bh 5 BYTEs data to return for INT 21/AX=6506h 60h 41 BYTEs data to return for INT 21/AX=6501h --------D-2F1401----------------------------- INT 2F - European MS-DOS 4.0 POPUP - "PostPu" - OPEN/CLOSE POPUP SCREEN AX = 1401h DL = function (00h open, 01h close) DH = wait flag 00h block until screen opens 01h return error if screen is not available 02h urgent--always open screen immediately Return: CF clear if successful BX = amount of memory needed to save screen and keyboard info, 0000h if default save location can be used (only if DH was 02h) CF set on error Note: the application using the screen is frozen until the popup screen is closed SeeAlso: AX=1400h"POPUP",AX=1402h"POPUP",AX=1403h"POPUP" --------U-2F1402----------------------------- INT 2F CU - NLSFUNC.COM - GET EXTENDED COUNTRY INFO AX = 1402h BP = subfunction (same as AL for INT 21/AH=65h) BX = code page (see #0962 at INT 21/AX=6602h) DX = country code (see #0625 at INT 21/AH=38h) DS:SI -> internal code page structure (see #1403) ES:DI -> user buffer CX = size of user buffer Return: AL = status 00h successful else DOS error code Notes: this function is called by the DOS v3.3+ kernel on INT 21/AH=65h code page structure apparently only needed for COUNTRY.SYS pathname SeeAlso: AX=1401h"NLSFUNC",AX=1403h"NLSFUNC",AX=1404h,INT 21/AH=65h --------D-2F1402----------------------------- INT 2F - European MS-DOS 4.0 POPUP - "SavePu" - SAVE POPUP SCREEN AX = 1402h ES:DI -> save buffer (0000h:0000h for default buffer in POPUP) Return: CF clear if successful CF set on error AX = error code (see #1404) SeeAlso: AX=1400h"POPUP",AX=1401h"POPUP",AX=1403h"POPUP" (Table 1404) Values for POPUP error code: 0001h process does not own screen 0004h unknown error 0005h invalid pointer --------U-2F1403----------------------------- INT 2F CU - NLSFUNC.COM - SET CODE PAGE AX = 1403h DS:SI -> internal code page structure (see #1403) BX = code page (see #0962 at INT 21/AX=6602h) DX = country code (see #0625 at INT 21/AH=38h) Return: AL = status ??? Note: this function is called by the DOS v3.3+ kernel on INT 21/AH=38h SeeAlso: AX=1402h"NLSFUNC",AX=1404h,INT 21/AH=38h"SET" --------D-2F1403----------------------------- INT 2F - European MS-DOS 4.0 POPUP - "RestorePu" - RESTORE SCREEN AX = 1403h ES:DI -> buffer containing saved screen (0000h:0000h for default buffer in POPUP) Return: CF clear if successful CF set on error AX = error code (see #1404) SeeAlso: AX=1400h"POPUP",AX=1401h"POPUP",AX=1402h"POPUP" --------U-2F1404----------------------------- INT 2F CU - NLSFUNC.COM - GET COUNTRY INFO AX = 1404h BX = code page (see #0962 at INT 21/AX=6602h) DX = country code (see #0625 at INT 21/AH=38h) DS:SI -> internal code page structure (see #1403) ES:DI -> user buffer Return: AL = status ??? Notes: this function is called by the DOS v3.3+ kernel on INT 21/AH=38h code page structure apparently only needed for COUNTRY.SYS pathname SeeAlso: AX=1402h,AX=1403h,INT 21/AH=38h"GET" --------U-2F14FE----------------------------- INT 2F U - DR-DOS 5.0 NLSFUNC - GET EXTENDED COUNTRY INFORMATION AX = 14FEh BX = code page (FFFFh=global code page) (see #0962 at INT 21/AX=6602h) DX = country ID (FFFFh=current country) (see #0625 at INT 21/AH=38h) ES:DI -> country information buffer CL = info ID 01h get general internationalization info 02h get pointer to uppercase table 04h get pointer to filename uppercase table 05h get pointer to filename terminator table 06h get pointer to collating sequence table 07h get pointer to Double-Byte Character Set table CF set (used to return error if not installed) Return: CF clear if successful DS:SI -> requested information CF set on error Notes: DR-DOS 5.0 NLSFUNC returns CF set and AX=0001h if AL was not 00h, FEh, or FFh on entry. the DR-DOS kernel calls this function on INT 21/AX=6501h the value in CL is not range-checked by the DR-DOS 5.0 NLSFUNC SeeAlso: #1405,AX=14FFh,INT 21/AH=65h Format of DR-DOS COUNTRY.SYS file: Offset Size Description (Table 1405) 00h 126 BYTEs copyright notice (terminated with Ctrl-Z, padded with NULs) 7Eh WORD signature EDC1h 80h var country pointer records Offset Size Description 00h WORD country code (0000h if end of array) 02h WORD code page 04h WORD ??? (0000h) 06h 7 WORDs offsets in file for data tables for subfunctions 01h-07h var var country information --------U-2F14FF----------------------------- INT 2F U - DR-DOS 5.0 NLSFUNC - PREPARE CODE PAGE AX = 14FFh BX = code page Return: AX = ??? ZF set if AX=0000h Notes: DR-DOS 5.0 NLSFUNC returns CF set and AX=0001h if AL was not 00h, FEh, or FFh on entry. passes codepage preparation request to each character device supporting the generic IOCTL call SeeAlso: AX=14FEh,INT 21/AX=440Ch,INT 21/AX=6602h --------U-2F1500----------------------------- INT 2F - DOS 4.00 GRAPHICS.COM - INSTALLATION CHECK AX = 1500h Return: AX = FFFFh ES:DI -> ??? (graphics data?) Note: this installation check conflicts with the CD-ROM Extensions installation check; moved to AX=AC00h in later versions SeeAlso: AX=AC00h --------d-2F1500BX0000----------------------- INT 2F - CD-ROM - INSTALLATION CHECK AX = 1500h BX = 0000h Return: BX = number of CD-ROM drive letters used CX = starting drive letter (0=A:) Notes: this installation check DOES NOT follow the format used by other software this installation check conflicts with the DOS 4.00 GRAPHICS.COM installation check SeeAlso: INT 2F/AX=D000h/BX=4D44h"Lotus" --------c-2F1500CH90------------------------- INT 2F U - CDBLITZ v2.11 - INSTALLATION CHECK AX = 1500h CH = 90h (function number) BX = 1234h (magic value for CDBLITZ) Return: CX = 1234h if installed CF clear DX = BCD version number (DH = major, DL = minor) Program: CDBLITZ is a CD-ROM cache by Blitz 'n' Software, Inc. SeeAlso: AX=1500h/CH=99h --------c-2F1500CH91------------------------- INT 2F U - CDBLITZ v2.11 - GET STATISTICS AX = 1500h CH = 91h (function number) BX = 1234h (magic value for CDBLITZ) Return: CF clear ES:BX -> statistics record (see #1406) SeeAlso: AX=1500h/CH=90h,AX=1500h/CH=97h Format of CDBLITZ statistics record: Offset Size Description (Table 1406) 00h WORD cache mode (see also AX=1500h/CH=94h) 0001h 'min', 0002h 'max' 02h DWORD number of read calls??? 06h DWORD total number of sectors read 0Ah DWORD unused??? (zero) 0Eh DWORD number of cache hit sectors 12h WORD cache size in KB 14h WORD unused??? (zero) 16h WORD cache state (0000h disabled, 0001h enabled) --------c-2F1500CH92------------------------- INT 2F U - CDBLITZ v2.11 - ENABLE CACHE AX = 1500h CH = 92h (function number) BX = 1234h (magic value for CDBLITZ) Return: CF clear SeeAlso: AX=1500h/CH=90h,AX=1500h/CH=93h,AX=1500h/CH=94h --------c-2F1500CH93------------------------- INT 2F U - CDBLITZ v2.11 - DISABLE CACHE AX = 1500h CH = 93h (function number) BX = 1234h (magic value for CDBLITZ) Return: CF clear SeeAlso: AX=1500h/CH=90h,AX=1500h/CH=92h,AX=1500h/CH=95h --------c-2F1500CH94------------------------- INT 2F U - CDBLITZ v2.11 - SET 'MAX' MODE (CACHE BOTH DIRECTORIES AND DATA) AX = 1500h CH = 94h (function number) BX = 1234h (magic value for CDBLITZ) Return: CF clear SeeAlso: AX=1500h/CH=90h,AX=1500h/CH=92h,AX=1500h/CH=95h --------c-2F1500CH95------------------------- INT 2F U - CDBLITZ v2.11 - SET 'MIN' MODE (CACHE ONLY DIRECTORY ENTRIES) AX = 1500h CH = 95h (function number) BX = 1234h (magic value for CDBLITZ) Return: CF clear SeeAlso: AX=1500h/CH=90h,AX=1500h/CH=94h --------c-2F1500CH96------------------------- INT 2F U - CDBLITZ v2.11 - FLUSH CACHE AX = 1500h CH = 96h (function number) BX = 1234h (magic value for CDBLITZ) Return: CF clear Note: this function resets the counts for number of sectors read and number of cache hits, but no other values in the statistics record (see #1406) SeeAlso: AX=1500h/CH=90h --------c-2F1500CH97------------------------- INT 2F U - CDBLITZ v2.11 - GET CACHE STATISTICS AX = 1500h CH = 97h (function number) BX = 1234h (magic value for CDBLITZ) Return: CF clear AL = cache mode (01h 'min', 02h 'max') (see also AX=1500h/CH=94h) AH = cache state (00h disabled, 01h enabled) BX = cache size in KB DX:CX = total number of reads DI:SI = number of cache hits SeeAlso: AX=1500h/CH=90h,AX=1500h/CH=91h --------c-2F1500CH99------------------------- INT 2F U - CDBLITZ v2.11 - UNINSTALL AX = 1500h CH = 99h (function number) BX = 1234h (magic value for CDBLITZ) Return: CF clear ??? Program: CDBLITZ is a CD-ROM cache by Blitz 'n' Software, Inc. SeeAlso: AX=1500h/CH=90h --------d-2F1501----------------------------- INT 2F - CD-ROM - GET DRIVE DEVICE LIST AX = 1501h ES:BX -> buffer to hold drive letter list (5 bytes per drive letter) Return: buffer filled, for each drive letter BYTE subunit number in driver DWORD address of device driver header --------d-2F1502----------------------------- INT 2F - CD-ROM - GET COPYRIGHT FILE NAME AX = 1502h ES:BX -> 38-byte buffer for name of copyright file CX = drive number (0=A:) Return: CF set if drive is not a CD-ROM drive AX = 000Fh (invalid drive) CF clear if successful SeeAlso: AX=1503h --------d-2F1503----------------------------- INT 2F - CD-ROM - GET ABSTRACT FILE NAME AX = 1503h ES:BX -> 38-byte buffer for name of abstract file CX = drive number (0=A:) Return: CF set if drive is not a CD-ROM drive AX = 000Fh (invalid drive) CF clear if successful SeeAlso: AX=1502h,AX=1504h --------d-2F1504----------------------------- INT 2F - CD-ROM - GET BIBLIOGRAPHIC DOC FILE NAME AX = 1504h ES:BX -> 38-byte buffer for name of bibliographic documentation file CX = drive number (0=A:) Return: CF set if drive is not a CD-ROM drive AX = 000Fh (invalid drive) CF clear if successful SeeAlso: AX=1502h,AX=1503h --------d-2F1505----------------------------- INT 2F - CD-ROM - READ VTOC AX = 1505h ES:BX -> 2048-byte buffer CX = drive number (0=A:) DX = sector index (0=first volume descriptor,1=second,...) Return: CF set on error AX = error code (15=invalid drive,21=not ready) CF clear if successful AX = volume descriptor type (1=standard,FFh=terminator,0=other) --------d-2F1506----------------------------- INT 2F - CD-ROM - TURN DEBUGGING ON AX = 1506h BX = debugging function to enable Note: reserved for development SeeAlso: AX=1507h --------d-2F1507----------------------------- INT 2F - CD-ROM - TURN DEBUGGING OFF AX = 1507h BX = debugging function to disable Note: reserved for development SeeAlso: AX=1506h --------d-2F1508----------------------------- INT 2F - CD-ROM - ABSOLUTE DISK READ AX = 1508h ES:BX -> buffer CX = drive number (0=A:) SI:DI = starting sector number DX = number of sectors to read Return: CF set on error AL = error code (15=invalid drive,21=not ready) CF clear if successful SeeAlso: AX=1509h --------d-2F1509----------------------------- INT 2F - CD-ROM - ABSOLUTE DISK WRITE AX = 1509h ES:BX -> buffer CX = drive number (0=A:) SI:DI = starting sector number DX = number of sectors to write Note: corresponds to INT 26h and is currently reserved and nonfunctional SeeAlso: AX=1508h --------d-2F150A----------------------------- INT 2F - CD-ROM - RESERVED AX = 150Ah --------d-2F150B----------------------------- INT 2F - CD-ROM v2.00+ - DRIVE CHECK AX = 150Bh CX = drive number (0=A:) Return: BX = ADADh if MSCDEX.EXE installed AX = support status 0000h if drive not supported nonzero if supported SeeAlso: AX=150Dh --------d-2F150C----------------------------- INT 2F - CD-ROM v2.00+ - GET MSCDEX.EXE VERSION AX = 150Ch Return: BH = major version BL = minor version Note: MSCDEX.EXE versions prior to 2.00 return BX=0 --------d-2F150D----------------------------- INT 2F - CD-ROM v2.00+ - GET CD-ROM DRIVE LETTERS AX = 150Dh ES:BX -> buffer for drive letter list (1 byte per drive) Return: buffer filled with drive numbers (0=A:). Each byte corresponds to the drive in the same position for function 1501h SeeAlso: AX=150Bh --------d-2F150E----------------------------- INT 2F - CD-ROM v2.00+ - GET/SET VOLUME DESCRIPTOR PREFERENCE AX = 150Eh BX = subfunction 00h get preference DX = 0000h Return: DX = preference settings 01h set preference DH = volume descriptor preference 01h = primary volume descriptor 02h = supplementary volume descriptor DL = supplementary volume descriptor preference 01h = shift-Kanji CX = drive number (0=A:) Return: CF set on error AX = error code (15=invalid drive,1=invalid function) CF clear if successful --------d-2F150F----------------------------- INT 2F - CD-ROM v2.00+ - GET DIRECTORY ENTRY AX = 150Fh CL = drive number (0=A:) CH bit 0 = copy flag clear if direct copy set if copy to structure which removes ISO/High Sierra diffs ES:BX -> ASCIZ path name SI:DI -> buffer for directory entry (see #1407,#1408) minimum 255 bytes for direct copy Return: CF set on error AX = error code CF clear if successful AX = disk format (0=High Sierra,1=ISO 9660) Format of CD-ROM directory entry (direct copy): Offset Size Description (Table 1407) 00h BYTE length of directory entry 01h BYTE length of XAR in Logical Block Numbers 02h DWORD LBN of data, Intel (little-endian) format 06h DWORD LBN of data, Motorola (big-endian) format 0Ah DWORD length of file, Intel format 0Eh DWORD length of file, Motorola format ---High Sierra--- 12h 6 BYTEs date and time 18h BYTE bit flags 19h BYTE reserved ---ISO 9660--- 12h 7 BYTEs date and time 19h BYTE bit flags ---both formats--- 1Ah BYTE interleave size 1Bh BYTE interleave skip factor 1Ch WORD volume set sequence number, Intel format 1Eh WORD volume set sequence number, Motorola format 20h BYTE length of file name 21h N BYTEs file name BYTE (optional) padding if filename is odd length N BYTEs system data SeeAlso: #1408 Format of CD-ROM directory entry (canonicalized): Offset Size Description (Table 1408) 00h BYTE length of XAR in Logical Block Numbers 01h DWORD Logical Block Number of file start 05h WORD size of disk in logical blocks 07h DWORD file length in bytes 0Bh 7 BYTEs date and time 12h BYTE bit flags 13h BYTE interleave size 14h BYTE interleave skip factor 15h WORD volume set sequence number 17h BYTE length of file name 18h 38 BYTEs ASCIZ filename 3Eh WORD file version number 40h BYTE number of bytes of system use data 41h 220 BYTEs system use data SeeAlso: #1407 --------d-2F1510----------------------------- INT 2F - CD-ROM v2.10+ - SEND DEVICE DRIVER REQUEST AX = 1510h CX = CD-ROM drive letter (0 = A, 1 = B, etc) ES:BX -> CD-ROM device driver request header (see #1382 at AX=0802h) --------W-2F1600----------------------------- INT 2F - MS Windows - WINDOWS ENHANCED MODE INSTALLATION CHECK AX = 1600h Return: AL = status 00h neither Windows 3.x enhanced mode nor Windows/386 2.x running 01h Windows/386 2.x running 80h XMS version 1 driver installed (neither Windows 3.x enhanced mode nor Windows/386 2.x running) (obsolete--see note) FFh Windows/386 2.x running AL = anything else AL = Windows major version number >= 3 AH = Windows minor version number Notes: INT 2F/AH=16h comprises an API for non-Windows programs (DOS device drivers, TSRs, and applications) to cooperate with multitasking Windows/386 2.x and Windows 3.x and higher enhanced mode. certain calls are also supported in the Microsoft 80286 DOS extender in Windows standard mode this function served as the installation check and AX=1610h served to get the driver entry point for XMS version 1, which is now obsolete. Use AX=4300h and AX=4310h instead SeeAlso: AX=160Ah,AX=1610h,AX=4300h,AX=4680h Index: installation check;XMS version 1 --------W-2F1602----------------------------- INT 2F - MS Windows/386 2.x - GET API ENTRY POINT AX = 1602h Return: ES:DI -> Windows/386 2.x API procedure entry point Notes: this interface is supported in Windows 3.x only for 2.x compatibility to get the current virtual machine (VM) ID in Windows/386 2.x: AX = 0000h ES:DI -> return address JUMP to address returned from INT 2F/AX=1602h After JUMP, at return address: BX = current VM ID. SeeAlso: AX=C020h --------W-2F1603----------------------------- INT 2F - MS Windows/386 - GET INSTANCE DATA AX = 1603h Return: AX = 5248h ('RH') if supported DS:SI -> Windows/386 instance data (see #1409) Notes: reportedly supported by RM Nimbus MS-DOS 3.3 kernel this function is called by DOSMGR when AX=1607h/BX=0015h is not supported, as is the case in DOS versions prior to 5.0 see Geoff Chappell's book _DOS_Internals_ for additional discussions of this function, DOSMGR's behavior, and instancing in general SeeAlso: AX=1607h/BX=0015h Format of Windows/386 instance data: Offset Size Description (Table 1409) 00h WORD segment of IO.SYS (0000h = default 0070h) 02h WORD offset in IO.SYS of STACKS data structure (DOS 3.2x) 0000h if not applicable 04h WORD number of instance data entries (max 32) 06h Array of instance data entries Offset Size Description 00h WORD segment (0002h = DOS kernel) 02h WORD offset 04h WORD size --------W-2F1605----------------------------- INT 2F - MS Windows - WINDOWS ENHANCED MODE & 286 DOSX INIT BROADCAST AX = 1605h ES:BX = 0000h:0000h DS:SI = 0000h:0000h CX = 0000h DX = flags bit 0 = 0 if Windows enhanced-mode initialization bit 0 = 1 if Microsoft 286 DOS extender initialization bits 1-15 reserved (undefined) DI = version number (major in upper byte, minor in lower) Return: CX = 0000h if okay for Windows to load CX = FFFFh (other registers unchanged) if Windows 3.0 in standard mode CX <> 0 if Windows should not load ES:BX -> startup info structure (see #1410) DS:SI -> virtual86 mode enable/disable callback or 0000h:0000h (see #1413) Notes: the Windows enhanced mode loader and Microsoft 286 DOS extender will broadcast an INT 2F/AX=1605h call when initializing. Any DOS device driver or TSR can watch for this broadcast and return the appropriate values. If the driver or TSR returns CX <> 0, it is also its responsibility to display an error message. each handler must first chain to the prior INT 2F handler with registers unchanged before processing the call if the handler requires local data on a per-VM basis, it must store the returned ES:BX in the "next" field of a startup info structure and return a pointer to that structure in ES:BX a single TSR may set the V86 mode enable/disable callback; if DS:SI is already nonzero, the TSR must fail the initialization by setting CX nonzero MSD checks for Windows 3.0 running in standard mode by testing whether CX=FFFFh and other registers are unchanged on return Novell DOS v7.0 (Update 8 - Update 11) TASKMGR in multitasking mode uses this broadcast, even if TASKMGR.INI sets WinPresent= to OFF Micrsoft's EMM386.EXE for DOS 5+ when installed with the NOEMS option changes its driver name from EMMQXXX0 to EMMXXXX0 while Windows is active SeeAlso: AX=1606h,AX=1608h,AX=4B05h Format of Windows Startup Information Structure: Offset Size Description (Table 1410) 00h 2 BYTEs major, minor version of info structure 02h DWORD pointer to next startup info structure or 0000h:0000h 06h DWORD pointer to ASCIZ name of virtual device file or 0000h:0000h 0Ah DWORD virtual device reference data (see #1412) (only used if above nonzero) 0Eh DWORD pointer to instance data records (see #1411) or 0000h:0000h Format of one Instance Item in array: Offset Size Description (Table 1411) 00h DWORD address of instance data (end of array if 0000h:0000h) 04h WORD size of instance data Format of Virtual Device Reference Data: Offset Size Description (Table 1412) 00h DWORD physical address of ??? or 00000000h 04h DWORD physical address of ??? table 08h DWORD "DEST_PAGE" address to which pages must be mapped 0Ch N DWORDs "SRC_PAGE" physical addresses of the pages 00000000h = end of table Note: EMM386.EXE sets the first pointer to the start of the device driver chain, the second pointer to a field of 40h bytes followed by a 16-bit offset to the end of the SRC_PAGE table, and DEST_PAGE to the start segment of the UMB area (Table 1413) Values Windows virtual mode enable/disable procedure is called with: AX = 0000h disable V86 mode AX = 0001h enable V86 mode interrupts disabled Return: CF set on error CF clear if successful interrupts disabled --------W-2F1606----------------------------- INT 2F - MS Windows - WINDOWS ENHANCED MODE & 286 DOSX EXIT BROADCAST AX = 1606h DX = flags bit 0 = 0 if Windows enhanced-mode exit bit 0 = 1 if Microsoft 286 DOS extender exit bits 1-15 reserved (undefined) Notes: if the init broadcast fails (AX=1605h returned CX <> 0), then this broadcast will be issued immediately. this call will be issued in real mode Novell DOS v7.0 (Update 8 - Update 10) TASKMGR in multitasking mode uses this broadcast, even if TASKMGR.INI sets Win31Present= to OFF SeeAlso: AX=1605h,AX=1609h --------W-2F1607----------------------------- INT 2F - MS Windows - VIRTUAL DEVICE CALL OUT API AX = 1607h BX = virtual device ID (see #1419) CX = (usually) callout subfunction Return: (usually) AX,BX,CX,DX,ES contain results Notes: more of a convention than an API, this call specifies a standard mechanism for Windows enhanced-mode virtual devices (VxD's) to talk to DOS device drivers and TSRs see below for details on several virtual devices SeeAlso: AX=1605h,AX=1607h/BX=000Ch,AX=1607h/BX=0014h,AX=1607h/BX=0015h SeeAlso: AX=1607h/BX=0018h,AX=1684h,AX=C020h --------W-2F1607BX0006----------------------- INT 2F - MS Windows - "V86MMGR" VIRTUAL DEVICE API AX = 1607h BX = 0006h (VxD identifier of "V86MMGR") CX = 0000h Return: AX = status 0000h if local A20 state changed 1607h if A20 unchanged other if global A20 state changed --------W-2F1607BX000C----------------------- INT 2F - MS Windows - "VMD" VIRTUAL MOUSE DEVICE API AX = 1607h BX = 000Ch (VxD identifier of "VMD") Return: CX = nonzero if mouse driver already virtualized Note: VMD (Virtual Mouse Driver) calls this and then checks whether CX is nonzero; if yes, it will not automatically virtualize the mouse driver. This would be used if MOUSE.COM already virtualizes itself using the Windows API. SeeAlso: AX=1607h/BX=0014h,AX=1607h/BX=0015h ----------2F1607BX0010----------------------- INT 2F C - MS Windows 3.1 - "BLOCKDEV" VIRTUAL HARD DISK DEVICE API AX = 1607h BX = 0010h (VxD identifier of "BLOCKDEV") CX = function 0001h starting FastDisk compatibility tests 0002h ending FastDisk compatibility tests 0003h check if FastDisk installation allowed Return: CX = 0000h if allowed Note: this interface is called by the Windows FastDisk driver (such as WDCTRL) when it thinks that the INT 13h handler immediately below IO.SYS's INT 13h code is not in ROM; it should be supported by any program which hooks itself underneath IO.SYS's INT 13h code with INT 2F/AH=13h SeeAlso: AX=1607h/BX=0014h,INT 2F/AH=13h --------W-2F1607BX0014----------------------- INT 2F - MS Windows - "VNETBIOS" VIRTUAL DEVICE API AX = 1607h BX = 0014h (VxD identifier of "VNETBIOS") Return: ES:DI -> 128-byte table specifying VNETBIOS actions for each NetBIOS command code (see #1414) Note: VNETBIOS (Virtual NetBIOS) calls this function to determine whether the NetBIOS has an extensions Windows should know about SeeAlso: AX=1607h/BX=000Ch,AX=1607h/BX=0010h,AX=1607h/BX=0015h (Table 1414) Values for VNETBIOS action code: 00h "VN_Unknown" unknown command 04h "VN_No_Map" no memory mapping necessary 08h "VN_Map_In" input buffer is quickly used, so no global mapping needed 0Ch "VN_Map_In" output buffer is quickly used, so no global mapping needed 10h "VN_Map_In_Out" buffer is quickly used, so no global mapping needed 14h "VN_Chain_Send" the chain-send command 18h "VN_Cancel" special case for cancel command 1Ch "VN_Buffer_In" buffer is incoming 20h "VN_Buffer_Out" buffer is outgoing 24h "VN_Buffer_In_Out" buffer used for both incoming and outgoing data --------D-2F1607BX0015----------------------- INT 2F C - MS Windows - "DOSMGR" VIRTUAL DEVICE API AX = 1607h BX = 0015h (VxD identifier of "DOSMGR") CX = function 0000h query instance processing DX = 0000h Return: CX = state 0000h not instanced other instanced (DOS 5+ kernel returns 0001h) DX = segment of DOS drivers or 0000h for default of 0070h ES:BX -> patch table (see #1416) 0001h set patches in DOS DX = bit mask of patch requests (see #1415) Return: AX = B97Ch BX = bit mask of patches applied (see #1415) DX = A2ABh 0002h remove patches in DOS (ignored by DOS 5.0 kernel) DX = bit mask of patch requests (see function 0001h) Return: CX = 0000h (DOS 5-6) Note: return values are ignored by DOSMGR in Windows 3.1 0003h get size of DOS data structures DX = bit mask of request (only one bit can be set) bit 0: Current Directory Structure size Return: if supported request: AX = B97Ch CX = size in bytes of requested structure DX = A2ABh else: CX = 0000h all other registers preserved 0004h determine instanced data structures Return: AX = B97Ch if supported DX = A2ABh if supported (DOS 5+ kernel returns 0000h) BX = bit mask of instanced items bit 0: CDS bit 1: SFT bit 2: device list bit 3: DOS swappable data area 0005h get device driver size ES = segment of device driver Return: DX:AX = 0000h:0000h on error (not dev. driver segment) DX:AX = A2ABh:B97Ch if successful BX:CX = size of device driver in bytes Notes: DOSMGR (DOS Manager) will check whether the OEM DOS/BIOS data has been instanced via this API and will not perform its own default instancing of the normal DOS/BIOS data if so; if this API is not supported, DOSMGR will also try to access instancing data through INT 2F/AX=1603h these functions are supported by the DOS 5+ kernel; DOSMGR contains tables of instancing information for earlier versions of DOS see Geoff Chappell's book _DOS_Internals_ for additional discussions of DOSMGR's behavior and instancing in general SeeAlso: AX=1603h,AX=1605h,AX=1607h/BX=000Ch,AX=1607h/BX=0014h,AX=1684h Bitfields for DOSMGR patch requests: Bit(s) Description (Table 1415) 0 enable critical sections 1 NOP setting/checking user ID 2 turn INT 21/AH=3Fh on STDIN into polling loop 3 trap stack fault in "SYSINIT" to WIN386 4 BIOS patch to trap "Insert disk X:" to WIN386 Format of DOSMGR patch table: Offset Size Description (Table 1416) 00h 2 BYTEs DOS version (major, minor) 02h WORD offset in DOS data segment of "SAVEDS" 04h WORD offset in DOS data segment of "SAVEBX" 06h WORD offset in DOS data segment of InDOS flag 08h WORD offset in DOS data segment of User ID word 0Ah WORD offset in DOS data segment of "CritPatch" table to enable critical section calls (see INT 2A/AH=80h) 0Ch WORD (DOS 5+ only) offset in DOS data segment of "UMB_HEAD", containing segment of last MCB in conventional memory --------W-2F1607BX0018----------------------- INT 2F C - MS Windows - "VMPoll" VIRTUAL DEVICE - IDLE CALLOUT AX = 1607h BX = 0018h (VMPoll VxD ID) CX = 0000h Return: AX = status 0000h if timeslice used nonzero if timeslice not needed Note: when VMPoll makes this callout, all virtual machines are idle SeeAlso: AX=1607h --------W-2F1607BX0021-------------------------------------- INT 2F C - MS Windows - "PageFile" VIRTUAL DEVICE - GET LOCK BYTE AX = 1607h BX = 0021h (PageFile VxD ID) CX = 0000h Return: AX = status 0000h success ES:DI -> cache lock byte in disk cacher other no disk cache or unsupported Notes: PageFile issues this call on real-mode initialization in order to allow disk caches to provide it with a byte which it can use to temporarily lock the disk cache; VMPOLL also issues this call, so it is made twice each time Windows starts up if this call fails, PageFile falls back to other techniques for locking the disk cache SeeAlso: AX=1607h --------E-2F1607BX22C0----------------------- INT 2F - Rational Systems DOS/4GW - ??? AX = 1607h BX = 22C0h ??? Return: ??? SeeAlso: INT 15/AX=BF02h,INT 15/AX=BF04h --------W-2F1608----------------------------- INT 2F C - MS Windows - WINDOWS ENHANCED MODE INIT COMPLETE BROADCAST AX = 1608h Notes: called after all installable devices have been initialized real-mode software may be called between the Windows enhanced-mode init call (AX=1605h) and this call; the software must detect this situation SeeAlso: AX=1605h,AX=1609h --------W-2F1609----------------------------- INT 2F C - MS Windows - WINDOWS ENHANCED MODE BEGIN EXIT BROADCAST AX = 1609h Note: called at the beginning of a normal exit sequence; not made in the event of a fatal system crash SeeAlso: AX=1606h,AX=1608h --------W-2F160A----------------------------- INT 2F - MS Windows 3.1 - IDENTIFY WINDOWS VERSION AND TYPE AX = 160Ah Return: AX = 0000h if call supported BX = version (BH=major, BL=minor) CX = mode (0002h = standard, 0003h = enhanced) SeeAlso: AX=1600h,AX=4680h --------W-2F160B----------------------------- INT 2F - MS Windows 3.1 - IDENTIFY TSRs AX = 160Bh ES:DI -> communication structure (see #1417) or 0000h:0000h Return: ES:DI -> communication structure Desc: this call allows Windows-aware TSRs to make themselves known to Windows. Note: the TSR should allocate a communication structure, place the given ES:DI pointer in the first field, and return a pointer to the new structure SeeAlso: AX=1605h,AX=160Ch,AX=4B01h,AX=4B05h Format of TSR-to-Windows communication structure: Offset Size Description (Table 1417) 00h DWORD pointer to next structure 04h WORD PSP segment 06h WORD API version ID (0100h) 08h WORD EXEC flags bit 0: "WINEXEC" bit 1: "LOADLIBRARY" bit 2: "OPENDRIVER" 0Ah WORD "exec_cmd_show" 0Ch DWORD "exec_cmd" 10h 4 BYTEs reserved (0) 14h DWORD pointer to TSR ID block (see #1418) 18h DWORD pointer to TSR data block or 0000h:0000h Format of Norton Utilities 6.0 TSR ID block: Offset Size Description (Table 1418) 00h WORD length of name string 02h N BYTEs name of TSR's executable --------W-2F160C----------------------------- INT 2F - MS Windows 3.1 - DETECT ROMs AX = 160Ch ??? Return: ??? Note: used by ROM Windows SeeAlso: AX=160Bh --------m-2F1610----------------------------- INT 2F - XMS v1.x only - GET DRIVER ADDRESS AX = 1610h details unavailable Note: this function and AX=1600h were only used in XMS version 1 and are now obsolete. Use AX=4300h and AX=4310h instead SeeAlso: AX=1600h,AX=4310h --------W-2F1680----------------------------- INT 2F - MS Windows, DPMI, various - RELEASE CURRENT VIRTUAL MACHINE TIME-SLICE AX = 1680h Return: AL = status 00h if the call is supported 80h (unchanged) if the call is not supported Notes: programs can use this function in idle loops to enhance performance under multitaskers; this call is supported by MS Windows 3.0, DOS 5+, DPMI 1.0+, and in OS/2 2.0+ for multitasking DOS applications does not block the program; it just gives up the remainder of the time slice should not be used by Windows-specific programs when called very often without intermediate screen output under WIN 3+, the VM will go into an idle-state and will not receive the next slice before 8 seconds. This time can be changed in SYSTEM.INI through "IdleVMWakeUpTime=<seconds>". Setting to zero results in a long wait. SeeAlso: INT 15/AX=1000h,INT 15/AX=5305h,INT 21/AH=89h,INT 7A/BX=000Ah --------W-2F1681----------------------------- INT 2F - MS Windows 3+ - BEGIN CRITICAL SECTION AX = 1681h Notes: used to prevent a task switch from occurring should be followed by an INT 2F/AX=1682h call as soon as possible nested calls are allowed, and must be followed by an appropriate number of "end critical section" calls not supported in Windows/386 2.x. Get INDOS flag with INT 21/AH=34h and increment by hand. SeeAlso: AX=1682h,INT 15/AX=101Bh,INT 21/AH=34h --------W-2F1682----------------------------- INT 2F - MS Windows 3+ - END CRITICAL SECTION AX = 1682h Notes: not supported in Windows/386 2.x. Get InDOS flag with INT 21/AH=34h and decrement by hand, taking care not to decrement InDOS flag through zero SeeAlso: AX=1681h,INT 15/AX=101Ch,INT 21/AH=34h --------W-2F1683----------------------------- INT 2F - MS Windows 3+ - GET CURRENT VIRTUAL MACHINE ID AX = 1683h Return: BX = current virtual machine (VM) ID Notes: Windows itself currently runs in VM 1, but this can't be relied upon VM IDs are reused when VMs are destroyed an ID of 0 will never be returned SeeAlso: AX=1684h,AX=1685h,AX=168Bh --------W-2F1684----------------------------- INT 2F - MS Windows - GET DEVICE API ENTRY POINT AX = 1684h BX = virtual device (VxD) ID (see #1419) ES:DI = 0000h:0000h Return: ES:DI -> VxD API entry point, or 0:0 if the VxD does not support an API Note: some Windows enhanced-mode virtual devices provide services that applications can access. For example, the Virtual Display Device (VDD) provides an API used in turn by WINOLDAP. SeeAlso: AX=1683h (Table 1419) Values for MS Windows VxD ID: Value Name CallOut V86 PM Description 0000h LPT N N N DOS386 LPT Device (Windows for Workgroups 3.11) 0000h MSODISUP N N N MS ODI Support (Windows for Workgroups 3.11) 0000h NWNBLINK N N N Netware NetBIOS (Windows for Workgroups 3.11) 0000h SERIAL N N N DOS386 Serial Device (Windows for Workgrp 3.11) 0001h VMM N N Virtual Machine Manager 0002h Debug 0003h VPICD Y Y Virtual Prog. Interrupt Controller (PIC) Device 0004h VDMAD N N Virtual Direct Memory Access (DMA) Device 0005h VTD Y Y Virtual Timer Device 0006h V86MMGR Y N N Virtual 8086 Mode Device 0007h PageSwap N N Paging Device 0008h Parity N N Parity-check trapper 0009h Reboot N Y Ctrl-Alt-Del handler 000Ah VDD N Y Virtual Display Device (GRABBER) 000Bh VSD N N Virtual Sound Device 000Ch VMD Y Y Y Virtual Mouse Device 000Dh VKD N Y Virtual Keyboard Device 000Eh VCD N Y Virtual COMM Device 000Fh VPD Virtual Printer Device 0010h VHD Virtual Hard Disk Device (Windows 3.0) 0010h BLOCKDEV N N Virtual Hard Disk Device (Windows 3.1) 0010h IOS N N N DOS386 IOS Device (Windows for Workgroups 3.11) 0010h IOS N Y (Chicago) 0011h VMCPD Y Y Virtual Math CoProcessor Device 0012h EBIOS N N Reserve EBIOS page (e.g., on PS/2) 0013h BIOSXLAT N N Map ROM BIOS API between prot & V86 mode 0014h VNETBIOS Y N N Virtual NetBIOS Device 0015h DOSMGR Y Y N DOS data instancing (see #1422) 0016h WINLOAD 0017h SHELL N Y 0018h VMPOLL N N 0019h VPROD 001Ah DOSNET N N assures network integrity across VMs 001Ah VNETWARE Y Y Novell NetWare DOSNET replacement 001Bh VFD N N Virtual Floppy Device 001Ch VDD2 Secondary display adapter 001Ch LoadHi N N Netroom LoadHi Device (RMLODHI.VXD) 001Ch LoadHi N N 386MAX LoadHi Device (386MAX.VXD) 001Ch LoadHi N N Win386 LoadHi Device (EMM386.EXE) 001Dh WINDEBUG N Y 001Dh TDDebug N Y 001Eh TSRLoad TSR instance utility 001Fh BiosHook BIOS interrupt hooker VxD 0020h Int13 N N N 0021h PageFile N Y Paging File device 0022h SCSI 0023h MCA_POS 0024h SCSIFD SCSI FastDisk device 0025h VPEND Pen device 0026h APM Advanced Power Management 0027h VXDLDR N Y Y VXDLDR (Windows for Workgroups 3.11) 0028h NDIS N Y Y Network Driver Interface Specification (Windows for Workgroups 3.11) 002Ah VWIN32 N Y (Chicago) 002Bh VCOMM N Y Y DOS386 VCOMM Device (Windows for Workgrps 3.11) 002Dh W32S Y N Y WIN32s 0030h MACH32 N N Y ATI Mach32 video card 0031h NETBEUI N N N NETBEUI (Windows for Workgroups 3.11) 0032h SERVER N Y Y Int21 File Server (Windows for Workgroups 3.11) 0033h CONFIGMG Y Y (Chicago) 0033h EDOS N N Windows DOS Box Enhancer by Mom's Software 0034h DWCFGMG.SYS Plug-and-Play configuration manager 0036h VFBACKUP Y Y (Chicago) 0038h VCOND Y Y (Chicago) 003Ah VPMTD N N Y IFAX Scheduler Device (Windows for Workgr 3.11) 003Bh DSVXD Y N DoubleSpace VxD from MS-DOS v6.x 0051h ISAPNP N N 008Dh ESDI_506 N N (Chicago) 0090h voltrack N N 00FDh FAKEIDE N N (Chicago) 0102h CV1 N N Microsoft C/C++ 7.00+ CodeView for Windows 0200h VIPX Y Y NetWare Virtual IPX Driver 0201h VNWLSERV N N NetWare Lite 1.1 Server (SERVER.EXE) 0202h WINICE Y Y SoftICE/W 0203h VCLIENT N Y NetWare Lite 1.1+ Client 0205h VCAFT N N Novell Virtual CAFT Driver (LANalyzer for Win) 0205h BCW Y Y Nu-Mega Bounds Checker for Windows 0206h VTXRX N N Novell Virtual TXRX Driver (LANalyzer for Win) 0234h VCOMMUTE Y Y PC Tools Commute 0442h VTDAPI N Y MMSys Win386 VTAPI Device 0444h VADMAD Autoinitialize DMA (Windows 3.0) 0445h VSBD Y Y WinResKit: Sound Blaster Device 0446h VADLIBD Y Y Y MMSys Win386 AdLib Device (v3.x) 045Dh VflatD N Y dva.386, part of WIN32s 0460h UNIMODEM N Y 0480h VNetSup N Y Y Virtual Net Support (Windows for Workgrps 3.11) 0481h VRedir N N N Redirector File System Driver (Windows for Workgroups 3.11) 0482h VBrowse Y Y Win386 Virtual Browser 0483h VSHARE N N Windows for Workgroups Virtual SHARE 0484h IFSMgr Y Y N Installable File System Manager (Windows for Workgroups 3.11) 0486h VFAT N Y Y Win386 HPFS Driver (Windows for Workgrps 3.11) 0487h NWLINK Y Y Win386 Virtual Packet Exchange Protocol 0487h NWSUP Y N N NetWare Vnetbios shim 048Bh VCache N Y Y Virtual File Cache (Windows for Workgrps 3.11) 048Bh VCACHE Y Y 048Dh RASMAC Y Y enhanced mode Win4Workgroups RASMAC device 1021h VMB Y Y Microsoft C/C++ 7.00 WXSRVR 1022h Vpfd Y Y Microsoft C/C++ 7.00 1025h MMD Y Y Microsoft C/C++ 8.00, Visual C/C++ 1.00 2020h PIPE Y Y by Thomas W. Olson, in Windows/DOS DevJrn 5/92 21EAh VADLIBWD N Y Adlib Waveform Driver by John Ridges 2200h VFINTD Y Y Norton VFINTD (Norton Desktop) 22C0h ??? Y Rational Systems DOS/4GW ??? 2402h ZMAX N N Qualitas 386MAX v7 DOSMAX handler 24A0h VNSS N Y Norton Screen Saver (Norton Desktop) 24A1h VNDWD Y Y Norton VNDWD Device (Norton Desktop) 24A2h SYMEvent Y Y Norton Utilities v8 2540h VILD Y N INTERLNK client from MS-DOS v6.x 2640h VASBID N Y WinResKit: Artisoft Sounding Board Device 2860h COMMTASK N N Y Windows 386-mode preemptive tasker by James A. Kenemuth of Interabang Computing 28A1h PharLap Y Y Y PharLap 386|DOS-Extender DOSXNT.386 28C0h VXD N Y Y Generic VxD for real and protected mode by Andrew Schulman in MSJ February 1993 2925h EDOS Y Y Enhanced DOS by Firefly Software 292Dh VSBPD Y Y Sound Blaster Pro 3098h VstlthD N N N for QEMM Stealth ROM mode 310Eh WPS N Y MS DevNet CD-ROM: Windows Process Status 32CBh VFRAD Y Y Dr.Franz - Simulatan's diagnotics VFRAD.386 4321h POSTMSG Y Y (see #1436) 7A5Fh SIWVID Y Y Y Soft-ICE for Windows video driver 7FE0h VSWITCHD Y N by Jeff Prosise 7FE0h VWFD N Y Y reports windowed/fullscreen state by Neil Sandlin of Microsoft 7FE1h VWATCHD N Y Y basic driver w/ no functionality except tracing by Keith Jin of Microsoft PSS 7FE5h VFINTD N Y Y Virtual Floppy Interrupt trapper by Neil Sandlin of Microsoft 7FE7h VMPAGES N Y Y demonstration of exporting VxD services, by Neil Sandlin of Microsoft 7FE8h VPOSTD Y Y PostMessage() demo by Curtis J. Palmer of MS 7FE9h VIdleD N N N demonstration of Call_When_Idle function, by Bernie McIlroy of Microsoft 7FEBh VMIOD N N N Virtual Monitor I/O Traffic Device, by Neil Sandlin of Microsoft 7FEDh VMIRQD N N N Virtual Monitor IRQ Traffic Device, by Neil Sandlin of Microsoft 8888h VbillD Bill Potvin II's for reversing Compaq LTE video EEEEh VEPSD N N Virtual Extended Paging Services for Borland C++ v4.0 Note: The high bit of the VxD ID is reserved for future use. The next 10 bits are the OEM number which is assigned by Microsoft. The low 5 bits are the device number. Naturally, this scheme has not been adhered to since there are now more than 32 different VxDs. --------W-2F1684BX0005----------------------- INT 2F - MS Windows - VTD - GET DEVICE API ENTRY POINT AX = 1684h BX = 0005h (virtual device ID for VTD device) (see #1419) ES:DI = 0000h:0000h Return: ES:DI -> VxD API entry point (see #1420) 0000h:0000h if the VxD does not support an API (Table 1420) Call VTD.386 entry point with: AX = 0000h get VTD version number Return: AH = major version AL = minor version AX = 0100h get current clock tick time Return: EDX:EAX = clock tick time in 840ns units since Windows was started AX = 0101h get current system time in milliseconds Return: EAX = time in milliseconds that Windows has been running AX = 0102h get current virtual machine time Return: EAX = cumulative amount of time the virtual machine has been active, in milliseconds Note: this entry point should only be called directly when TOOLHELP.DLL TimerCount() cannot be called --------W-2F1684BX0009----------------------- INT 2F - MS Windows - REBOOT - GET DEVICE API ENTRY POINT AX = 1684h BX = 0009h (virtual device ID for REBOOT device) (see #1419) ES:DI = 0000h:0000h Return: ES:DI -> VxD API entry point (see #1421) 0000h:0000h if the VxD does not support an API (Table 1421) Call REBOOT protected-mode entry point with: AX = function 0100h warm boot Return: never Note: broadcasts "Reboot_Processor" message, which is caught by the VKD device 0201h set KERNEL Ctrl-Alt-Del handler ES:DI -> new Ctrl-Alt-Del handler DS:SI -> KERNEL reboot sanity check byte Return: CF clear Notes: if an application installs its own handler and then chains to Windows' handler, Windows will no longer be able to detect hung applications, and will always produce an "Application not responding" dialog DS must contain a writable, fixed selector because the provided address is converted to a linear address before being stored when Ctrl-Alt-Del is pressed in the system VM, Reboot sets the sanity check byte to zero, schedules a 750ms wait, and then tests whether the check byte is still zero; if not, it displays a message that there is no hung application and then exits 0202h get KERNEL Ctrl-Alt-Del handler Return: CF clear ES:DI -> current Ctrl-Alt-Del handler Note: the default handler is located in KERNEL 0203h display "Application not responding" dialog box ES:DI -> ASCIZ name of hung application Return: never if user pressed Ctrl-Alt-Del a second time CF clear AX = result 0000h user pressed Esc 0001h user pressed Enter Note: this function is used by the default Windows Ctrl-Alt-Del handler 0204h set/reset protected-mode INT 01 handler CX:EDX -> new protected-mode INT 01 handler CX = 0000h restore protected-mode INT 01 handler Return: CF clear Notes: if CX is nonzero, the current handler address is saved internally before the new handler is set; this saved address is then used when CX is zero on entry used by Windows' default Ctrl-Alt-Del handler; actual fatal exit to DOS will be done on next INT 01 Warning: opened files are not closed and remain open as orphaned files in DOS Note: functions 0201h and 0203h are not useful outside the system VM --------W-2F1684BX0015----------------------- INT 2F - MS Windows - DOSMGR - GET DEVICE API ENTRY POINT AX = 1684h BX = 0015h (virtual device ID for DOSMGR device) (see #1419) ES:DI = 0000h:0000h Return: ES:DI -> VxD API entry point (see #1422) 0000h:0000h if the VxD does not support an API (Table 1422) Call DOSMGR entry point with: AX = 0000h get DOSMGR version Return: CF clear AX = version (AH = major, AL = minor) AX = 0001h set critical focus Return: CF clear AX = 0002h crash current virtual machine Return: never Note: displays message box stating that "application has been stopped by the DOSMGR device" AX = 0003h enter critical section Note: this function assumes that the code for INT 2A/AX=8001h and INT 2A/AX=8002h have been modified for Windows AX = 0004h get VM ID byte Return: CF clear if successful ES:DI -> VM ID byte CF set on error Note: this function fails if the INT 2A modifications have not yet been applied AX = 0005h inform Windows of possible media change BL = drive number (00h=A:) Return: CF clear if successful CF set on error --------W-2F1684BX0017----------------------- INT 2F U - MS Windows - SHELL - GET DEVICE API ENTRY POINT AX = 1684h BX = 0017h (virtual device ID for SHELL device) (see #1419) ES:DI = 0000h:0000h Return: ES:DI -> VxD API entry point (see #1423) 0000h:0000h if the VxD does not support an API SeeAlso: AX=1684h/BX=0021h (Table 1423) Call SHELL entry point with: EDX = function number (0000h-0016h, mostly unknown) 0000h get version number Return: AX = version number EBX = system VM handle 0001h "SHELL_Get_SYSVM_Info" get system VM information Return: CF clear AX bit 0 set if system VM executing exclusively BX = background time slice priority CX = foreground time slice priority SI = minimum time slice in milliseconds 0002h "SHELL_Set_SYSVM_Info" set system VM information AX bit 0 set if system VM should execute exclusively (ignored?) BX = background time slice priority (1-10000) CX = foreground time slice priority (1-10000) SI = minimum time slice in milliseconds (1-10000) Return: CF clear if successful 0003h "SHELL_Crt_VM" create a virtual machine ES:EDI -> SEB structure (see #1424) Return: CF clear if successful EAX = VM handle CF set on error EDX,EAX = result from GetSetDetailedVMError() 0004h "SHELL_Destroy_VM" destroy a virtual machine EBX = VM handle (not system VM) Return: nothing 0005h "SHELL_Set_Focus" EBX = VM handle ECX = ??? Return: nothing 0006h "SHELL_Get_VM_State" EBX = VM handle (not system VM) ES:EDI -> ??? structure Return: CF clear if successful 0007h "SHELL_Set_VM_State" EBX = VM handle (not system VM) ES:EDI -> ??? structure 0008h "SHELL_Debug_Out" ??? Return: ??? Note: dummy function in retail version of MS Windows 0009h "SHELL_VMDA_Init" ??? Return: ??? 000Ah "SHELL_VMDA_Exit" ??? Return: ??? 000Bh "SHELL_Get_Message_Txt" ??? Return: ??? 000Ch "SHELL_Event_Complete" ??? Return: ??? 000Dh "SHELL_Get_Contention_Info" ??? Return: ??? 000Eh "SHELL_Get_Clip_Info" ??? Return: ??? 000Fh "SHELL_Set_Paste" ??? Return: ??? 0010h "SHELL_Switcher_Assist" ??? Return: ??? 0011h "SHELL_Get_FileSysChng" ??? Return: ??? 0012h "SHELL_Query_Destroy" ??? Return: ??? 0013h "SHELL_SetFocus_Cur_VM" set input focus to current VM ??? Return: ??? 0014h "SHELL_User_Busy_API" ??? Return: ??? 0015h "SHELL_Chng_Hot_Key" ??? Return: ??? 0016h "SHELL_Get_TermInfo" ??? Return: ??? Return: CF set if called from VM other than system VM EAX = FFFFFFFFh Note: except for function 0013h, this API may only be called from the system VM Format of Shell Execution Block (SEB): Offset Size Description (Table 1424) 00h DWORD PIF flags (see #1425) 04h DWORD display flags (see #1426) 08h PWORD -> pathname of .EXE to run 0Eh PWORD -> argument list 14h PWORD -> working drive/directory 1Ah WORD desired number of V86 pages for virtual machine 1Ch WORD minimum number of V86 pages for VM 1Eh WORD foreground priority 20h WORD background priority 22h WORD maximum KB of EMS 24h WORD minimum KB of EMS 26h WORD maximum KB of XMS 28h WORD minimum KB of XMS 2Ah WORD ??? 2Ch WORD ??? 2Eh 128 BYTEs title Note: the PWORDs at offsets 08h,0Eh, and 14h consist of a DWORD offset followed by a WORD selector Bitfields for 386 Enhanced Mode PIF flags: Bit(s) Description (Table 1425) 0 exclusive use of processor when VM is fullscreen 1 VM runs in background 2 VM runs in window 3-4 ??? 5 Alt-Tab reserved 6 Alt-Esc reserved 7 Alt-Space reserved 8 Alt-Enter reserved 9 Alt-PrtSc reserved 10 PrtSc reserved 11 Ctrl-Esc reserved 12 VM will release idle time slice 13 VM not allowed to use high mem 14 unknown 15 VM expanded mem not pageable 16 VM extended mem not pageable 17 Fast paste from clipboard enabled 18 VM app memory not pageable 30 Close VM when app exits Bitfields for SHELL display options: Bit(s) Description (Table 1426) 0 emulate text mode 1 monitor text port 2 monitor low graphics port 3 monitor high graphics port 7 Retain video memory --------W-2F1684BX0021----------------------- INT 2F U - MS Windows - PAGEFILE - GET DEVICE API ENTRY POINT AX = 1684h BX = 0021h (virtual device ID for PAGEFILE device) (see #1419) ES:DI = 0000h:0000h Return: ES:DI -> VxD API entry point (see #1427) 0000h:0000h if the VxD does not support an API SeeAlso: AX=1684h/BX=0017h (Table 1427) Call PAGEFILE entry point with: AX = function 0000h get version Return: CF clear AX = version (AH = major, AL = minor) 0001h get swap file info DS:SI -> 128-byte buffer for swap file full pathname DS:DI -> 128-byte buffer for SPART.PAR full pathname Return: CF clear AL = pager type (see #1428) AH = flags bit 7: swap file corrupted ECX = maximum size of swap file DS:SI buffer filled if paging enabled DS:DI buffer filled if permanent swap file 0002h delete permanent swap file on exit Return: CF clear 0003h get current temporary swap file size Return: CF clear DX:AX = current swap file size in bytes 0000h:0000h if permanent swap file Note: this API is only available in protected mode, and may only be called from the system VM (Table 1428) Values for MS Windows PAGEFILE pager type: 00h paging disabled 01h MSDOS 02h BIOS 03h 32-bit disk access SeeAlso: #1427 --------W-2F1684BX0034----------------------- INT 2F U - Intel Plug-and-Play - CONFIGURATION MANAGER - GET ENTRY POINT AX = 1684h BX = 0034h (ID for Configuration Manager) (see #1419) ES:DI = 0000h:0000h Return: ES:DI -> API entry point (see #1429) 0000h:0000h if Configuration Manager not loaded Index: installation check;Plug-and-Play Configuration Manager (Table 1429) Call Configuration Manager entry point with: AX = function 0000h "CM_GetVersion" get supported DDI version Return: AH = major version (01h) AL = minor version (00h) BX = number of devices identified by configuration Note: returns AX = 0000h if no config manager installed 0001h "CM_GetConfig" get device configuration BX = device index ES:DI -> buffer for configuration information (see #1430) Return: AX = status 0000h successful ES:DI buffer filled other error code (0001h = index out of range) 0002h "CM_LockConfig" lock device configuration ES:DI -> configuration information Return: AX = status 0000h successful ES:DI buffer filled with assigned config 0001h resources conflict 0002h invalid request or configuration info 0003h "CM_UnlockConfig" unlock device configuration ES:DI -> configuration information Return: AX = status 0000h successful ES:DI buffer filled with assigned config 0001h invalid request or configuration info Format of Configuration Information Structure: Offset Size Description (Table 1430) 00h DWORD bus ID 04h DWORD device ID 08h DWORD serial number 0Ch DWORD logical ID 10h DWORD flags ---ISA bus--- 14h BYTE Card Select Number 15h BYTE logical device number 16h WORD Read Data port ------ 18h WORD number of memory windows 1Ah 9 DWORDs physical base addresses of memory windows 3Eh 9 DWORDs length of memory windows 62h 9 WORDs memory window attributes 74h WORD number of I/O ports 76h 20 WORDs I/O port base addresses B6h 20 WORDs lengths of I/O port ranges F6h WORD number of IRQs F8h 7 BYTEs IRQ registers FFh 7 BYTEs IRQ attributes 106h WORD number of DMA channels 108h 7 BYTEs DMA channels used 10Fh 7 WORDs DMA channel attributes 11Dh 3 BYTEs reserved SeeAlso: #1429 --------W-2F1684BX0444----------------------- INT 2F - MS Windows - VADMAD - GET DEVICE API ENTRY POINT AX = 1684h BX = 0444h (virtual device ID for VADMAD device) (see #1419) ES:DI = 0000h:0000h Return: ES:DI -> VxD API entry point (see #1431) 0000h:0000h if the VxD does not support an API (Table 1431) Call VADMAD entry point with: DX = operation 0000h set VADMAD mode AX = desired mode 0001h set VADMAD channel AX = desired channel Note: after setting mode/channel, start the DMA operation with an OUT to I/O port 0Bh (channels 0-3) or D6h (channels 4-7) --------W-2F1684BX0750----------------------- INT 2F - MS Windows - VSWITCHD - GET DEVICE API ENTRY POINT AX = 1684h BX = 0750h (virtual device ID for VSWITCHD device) (see #1419) ES:DI = 0000h:0000h Return: ES:DI -> VxD API entry point (see #1432) 0000h:0000h if the VxD does not support an API (Table 1432) Call VSWITCHD entry point with: AX = function 0000h toggle windowed mode (simulate Alt-Enter keypress) Return: nothing 0001h get windowed mode Return: CF clear if VM is windowed CF set if VM is full-screen --------W-2F1684BX2925----------------------- INT 2F - MS Windows - EDOS - GET DEVICE API ENTRY POINT AX = 1684h BX = 2925h (virtual device ID for EDOS device) (see #1419) ES:DI = 0000h:0000h Return: ES:DI -> VxD API entry point (see #1433) 0000h:0000h if the VxD does not support an API (Table 1433) Call EDOS entry point with: AX = 0000h get EDOS version number Return: AH = major version AL = minor version AX = 0001h display message CX = 0 DX:BX -> ASCIZ Message AX = 0002h get EDOS error coded Return: EAX = time in milliseconds that Windows has been running AX = 0003h execute windows program Return: EAX = cumulative amount of time the virtual machine has been active, in milliseconds AX = 0008h get/set priority BX = 0000h??? foreground 0001h background DI = 0000h get 0001h set DX = priority setting Return: CX = foreground priority DX = background priority BX:AX = flags 00000001h exclusive ON 00000010h background ON SI = CPU percentage --------W-2F1684BX310E----------------------- INT 2F - MS Windows - WPS - GET DEVICE API ENTRY POINT AX = 1684h BX = 310Eh (virtual device ID for WPS device) (see #1419) ES:DI = 0000h:0000h Return: ES:DI -> VxD API entry point (see #1434) 0000h:0000h if the VxD does not support an API (Table 1434) Call WPS protected-mode entry point with: DX = function 0000h get WPS.386 version Return: CF clear AX = version (AH = major, AL = minor) 0001h get number of installed VxDs Return: CF clear AX = number of installed VxDs 0002h get VxD characteristics AX = number of VxD ES:BX -> buffer for VxD characteristics structure (see #1435) Return: CF clear ES:BX buffer filled Format of WPS.386 VxD characteristics structure: Offset Size Description (Table 1435) 00h WORD VxD ID number 02h BYTE VxD minor version 03h BYTE VxD major version 04h BYTE DDK minor version 05h BYTE DDK major version 06h WORD flags bit 0: V86 API supported bit 1: PM API supported bit 2: services supported 08h DWORD start order 0Ch 9 BYTEs ASCIZ VxD name --------W-2F1684BX8888----------------------- INT 2F - MS Windows - POSTMSG - GET DEVICE API ENTRY POINT AX = 1684h BX = 8888h (virtual device ID for POSTMSG device) (see #1419) ES:DI = 0000h:0000h Return: ES:DI -> VxD API entry point (see #1436,#1438) 0000h:0000h if the VxD does not support an API (Table 1436) Call POSTMSG protected-mode entry point with: AX = window handle CX:BX -> callback procedure (see #1437) Return: nothing Note: this call registers a WinApp with the VxD; the callback must be in a fixed, non-discardable code segment SeeAlso: #1438 (Table 1437) Values POSTMSG callback routine is called with: STACK: DWORD "lParam" parameter from DOSApp WORD "wParam" parameter from DOSApp WORD Windows message number (WM_USER + 100) DWORD registered hwnd (Table 1438) Call POSTMSG V86-mode entry point with: BX = wParam value to pass to protected-mode callback DX:AX = lParam value to pass to protected-mode callback Return: CF clear if successful CF set on error (no WinApp registered) SeeAlso: #1436 --------W-2F1684BX8888----------------------- INT 2F - MS Windows - VbillD - GET DEVICE API ENTRY POINT AX = 1684h BX = 8888h (virtual device ID for VbillD device) (see #1419) ES:DI = 0000h:0000h Return: ES:DI -> VxD API entry point (see #1439) 0000h:0000h if the VxD does not support an API (Table 1439) Call VbillD entry point with: AX = function 0001h set reverse video 0002h set normal video Return: ??? --------W-2F1685----------------------------- INT 2F - MS Windows - SWITCH VMs AND CALLBACK AX = 1685h BX = VM ID of virtual machine to switch to CX = flags (see #1440) DX:SI = priority boost (see VMM.INC) ES:DI -> FAR procedure to callback Return: CF set on error AX = error code 01h invalid VM ID 02h invalid priority boost 03h invalid flags CF clear if successful event will be or has been called Notes: some DOS devices, such as networks, need to call functions in a specific VM. This call forces the appropriate VM to be installed. the callback procedure must preserve all registers and return with IRET SeeAlso: AX=1683h,INT 15/AX=1117h,AX=DB06h"WINGO" Bitfields for VM switching flags: Bit(s) Description (Table 1440) 0 wait until interrupts enabled 1 wait until critical section unowned 2-15 reserved (zero) --------E-2F1686----------------------------- INT 2F - DOS Protected-Mode Interface - DETECT MODE AX = 1686h Return: AX = 0000h if operating in protected mode under DPMI (INT 31 available) AX nonzero if in real/V86 mode or no DPMI (INT 31 not available) SeeAlso: AX=1687h --------E-2F1687----------------------------- INT 2F - DOS Protected-Mode Interface - INSTALLATION CHECK AX = 1687h Return: AX = 0000h if installed BX = flags bit 0: 32-bit programs supported CL = processor type (02h=80286, 03h=80386, 04h=80486) DH = DPMI major version DL = two-digit DPMI minor version (binary) SI = number of paragraphs of DOS extender private data ES:DI -> DPMI mode-switch entry point (see #1441) AX nonzero if not installed SeeAlso: AX=1686h,AX=43E0h,AX=DE01h/BX=4450h,AX=FB42h/BX=0001h SeeAlso: INT 31/AX=0400h,INT 31/AX=5702h,INT 38/AH=10h (Table 1441) Call DPMI mode switch entry point with: AX = flags bit 0: set if 32-bit program ES = real mode segment of buffer for DPMI private data (ignored if SI was zero) Return: CF set on error program still in real mode AX = error code (DPMI 1.0+) 8011h unable to allocate all necessary descriptors 8021h 32-bit program specified, but 16-bit DPMI host CF clear if successful CS = 16-bit selector corresponding to real-mode CS SS = selector corresponding to real-mode SS (64K limit) DS = selector corresponding to real-mode DS (64K limit) ES = selector to program's PSP (100h byte limit) FS = GS = 0 high word of ESP = 0 if 32-bit program program now in protected mode Note: this entry point is only called for the initial switch to protected mode --------W-2F1688BX0BAD----------------------- INT 2F U - MS Windows 3.0, 386MAX v6.01 - GET ALIAS SELECTOR TO LDT AX = 1688h BX = 0BADh Return: AX = 0000h if supported BX = alias selector for LDT Note: use the LSL instruction or GetSelectorLimit() to find LDT size this call should be considered obsolete for Windows 3.1+, as the alias selector can be retrieved via the API entry point for "MS-DOS" retrieved from INT 2F/AX=168Ah (see #1443) --------W-2F1689----------------------------- INT 2F U - MS Windows 3.0+ - KERNEL IDLE CALL AX = 1689h ??? Return: ??? SeeAlso: AX=1680h,INT 15/AX=1000h,INT 28 --------E-2F168A----------------------------- INT 2F - DPMI 0.9+ - GET VENDOR-SPECIFIC API ENTRY POINT AX = 168Ah DS:(E)SI = selector:offset of ASCIZ vendor name (see #1442) Return: AL = status 00h successful ES:(E)DI -> extended API entry point 8Ah unsuccessful Notes: the vendor name is used to determine which entry point to return; it is case-sensitive available in protected mode only 32-bit applications use ESI and EDI, 16-bit applications use SI and DI this call is present but not documented for DPMI 0.9 the Borland C++ 3.1 DPMILOAD does not handle requests for entry points other than the MS-DOS one gracefully, producing an unhandled exception report; this has been fixed in the Borland Pascal 7 version SeeAlso: INT 31/AX=0A00h,INT 31/AH=57h (Table 1442) Values for DPMI vendor-specific API names: "MS-DOS" MS Windows and 386MAX v6.00+ (see #1443) "386MAX" 386MAX v6.00+ "HELIX_DPMI" Helix Netroom's DPMI server "Phar Lap" Phar Lap 286|DOS-Extender RUN286 (see #1444) (Table 1443) Call Windows-support ("MS-DOS") entry point with: AX = 0100h get LDT alias selector Return: CF clear if successful AX = alias selector CF set on error (Table 1444) Call Phar Lap RUN286 entry point with: AX = 0000h (function "load MSW") BX = new value for MSW register (low word of CR0) Return: ??? --------W-2F168B----------------------------- INT 2F - MS Windows 3.1 - SET FOCUS TO SPECIFIED VIRTUAL MACHINE AX = 168Bh BX = virtual machine ID (see AX=1683h), 0000h for current DOS box Return: AL = 00h if focus set to specified VM Notes: documented on the Microsoft Developer's Network CD-ROM if the VM is a windowed DOS box, it will be set to full screen SeeAlso: AX=1683h --------W-2F168C----------------------------- INT 2F - MS Windows 3.1 - RESTART COMMAND AX = 168Ch ??? Return: ??? Note: WIN.COM executes specified application --------W-2F1700----------------------------- INT 2F - MS Windows "WINOLDAP" - IDENTIFY WinOldAp VERSION AX = 1700h Return: AX = 1700h if this version of WINOLDAP doesn't support clipboard AX <> 1700h AL = WINOLDAP major version AH = WINOLDAP minor version Program: WinOldAp (WINOLDAP.MOD) is a Microsoft Windows extension supporting "old" (character-mode) application access to Dynamic Data Exchange, menus, and the Windows clipboard. Note: this installation check DOES NOT follow the format used by other software of returning AL=FFh SeeAlso: AX=1701h,AX=4601h Index: installation check;WINOLDAP --------W-2F1701----------------------------- INT 2F - MS Windows "WINOLDAP" - OPEN CLIPBOARD AX = 1701h Return: AX = status nonzero success 0000h clipboard is already open SeeAlso: AX=1700h,AX=1702h,AX=1703h,AX=1704h --------W-2F1702----------------------------- INT 2F - MS Windows "WINOLDAP" - EMPTY CLIPBOARD AX = 1702h Return: AX = status nonzero clipboard has been emptied 0000h failure SeeAlso: AX=1700h,AX=1701h,AX=1703h,AX=1704h --------W-2F1703----------------------------- INT 2F - MS Windows "WINOLDAP" - SET CLIPBOARD DATA AX = 1703h DX = clipboard format supported by WinOldAp (see #1445) ES:BX -> data (see #1446,#1447) SI:CX = size of data Return: AX = status nonzero data copied into the Clipboard 0000h failure (Table 1445) Values for WinOldAp clipboard format: 01h text 02h bitmap 03h metafile picture 04h SYLK 05h DIF 06h TIFF 07h OEM text 08h DIB bitmap 80h special format (used by Windows WRITE, maybe other Windows applets???) 81h DSP text 82h DSP bitmap Format of Windows Clipboard bitmap: Offset Size Description (Table 1446) 00h WORD type (0000h) 02h WORD width of bitmap in pixels 04h WORD height of bitmap in pixels 06h WORD bytes per line 08h BYTE number of color planes 09h BYTE number of adjacent color bits in pixel 0Ah DWORD pointer to start of data 0Eh WORD width in 0.1mm units 10h WORD height in 0.1mm units 12h N BYTEs bitmap data Format of Windows metafile picture: Offset Size Description (Table 1447) 00h WORD mapping mode 02h WORD X extent 04h WORD Y extent 06h WORD picture data --------W-2F1704----------------------------- INT 2F - MS Windows "WINOLDAP" - GET CLIPBOARD DATA SIZE AX = 1704h DX = clipboard format supported by WinOldAp (see #1445) Return: DX:AX = size of data in bytes, including any headers 0000h:0000h if no data in this format in the Clipboard Note: Windows reportedly rounds up the size of the data to a multiple of 32 bytes --------W-2F1705----------------------------- INT 2F - MS Windows "WINOLDAP" - GET CLIPBOARD DATA AX = 1705h DX = clipboard format supported by WinOldAp (see #1445) ES:BX -> buffer Return: AX = status nonzero success 0000h error, or no data in this format in Clipboard --------W-2F1708----------------------------- INT 2F - MS Windows "WINOLDAP" - CloseClipboard AX = 1708h Return: AX = status 0000h failure nonzero success --------W-2F1709----------------------------- INT 2F - MS Windows "WINOLDAP" - COMPACT CLIPBOARD AX = 1709h SI:CX = desired size in bytes Return: DX:AX = number of bytes in largest block of free memory Note: WinOldAp is responsible for including the size of any headers --------W-2F170A----------------------------- INT 2F - MS Windows "WINOLDAP" - GET DEVICE CAPABILITIES AX = 170Ah DX = GDI information index (see #1448) Return: AX = integer value of the desired item (see #1449,#1450,#1451,#1452,#1453,#1454,#1455) Note: This function returns the device-capability bits for the given display (Table 1448) Values for GDI information index: 00h device driver version 02h device classification 04h width in mm 06h height in mm 08h width in pixels 0Ah height in pixels 0Ch bits per pixel 0Eh number of bit planes 10h number of brushes supported by device 12h number of pens supported by device 14h number of markers supported by device 16h number of fonts supported by device 18h number of colors 1Ah size required for device descriptor 1Ch curve capabilities 1Eh line capabilities 20h polygon capabilities 22h text capabilities 24h clipping capabilities 26h bitblt capabilities 28h X aspect 2Ah Y aspect 2Ch length of hypotenuse of aspect 58h logical pixels per inch of width 5Ah logical pixels per inch of height SeeAlso: #1449,#1450,#1451,#1452,#1453,#1454,#1455 (Table 1449) Values for device classification: 00h vector plotter 01h raster display 02h raster printer 03h raster camera 04h character-stream, PLP 05h Metafile, VDM 06h display-file SeeAlso: #1448,#1450,#1451,#1452,#1453,#1454,#1455 Bitfields for curve capabilities: Bit(s) Description (Table 1450) 0 circles 1 pie wedges 2 chord arcs 3 ellipses 4 wide lines 5 styled lines 6 wide styled lines 7 interiors SeeAlso: #1448,#1449,#1451,#1452,#1453,#1454,#1455 Bitfields for line capabilities: Bit(s) Description (Table 1451) 1 polylines 2 markers 3 polymarkers 4 wide lines 5 styled lines 6 wide styled lines 7 interiors SeeAlso: #1448,#1449,#1450,#1452,#1453,#1454,#1455 Bitfields for polygon capabilities: Bit(s) Description (Table 1452) 0 polygons 1 rectangles 2 trapezoids 3 scanlines 4 wide borders 5 styled borders 6 wide styled borders 7 interiors SeeAlso: #1448,#1449,#1450,#1451,#1453,#1454,#1455 Bitfields for text capabilities: Bit(s) Description (Table 1453) 0 output precision character 1 output precision stroke 2 clippping precision stroke 3 90-degree character rotation 4 arbitrary character rotation 5 independent X and Y scaling 6 double-size 7 integer scaling 8 continuous scaling 9 bold 10 italic 11 underline 12 strikeout 13 raster fonts 14 vector fonts 15 reserved SeeAlso: #1448,#1449,#1450,#1451,#1452,#1454,#1455 (Table 1454) Values for clipping capabilities: 00h none 01h clipping to rectangles SeeAlso: #1448,#1449,#1450,#1451,#1452,#1453,#1455 Bitfields for raster capabilities: Bit(s) Description (Table 1455) 0 simple bitBLT 1 device requires banding support 2 device requires scaling support 3 supports >64K bitmap SeeAlso: #1448,#1449,#1450,#1451,#1452,#1453,#1454 ----------2F18------------------------------- INT 2F U - MS-Manager AH = 18h ??? Return: ??? --------l-2F1900----------------------------- INT 2F U - DOS 4.x only SHELLB.COM - INSTALLATION CHECK AX = 1900h Return: AL = status 00h not installed FFh installed --------l-2F1901----------------------------- INT 2F U - DOS 4.x only SHELLB.COM - SHELLC.EXE INTERFACE AX = 1901h BL = SHELLC type 00h transient 01h resident DS:DX -> far call entry point for resident SHELLC.EXE Return: ES:DI -> SHELLC.EXE workspace within SHELLB.COM Note: SHELLB.COM and SHELLC.EXE are parts of the DOS 4.x shell --------l-2F1902----------------------------- INT 2F U - DOS 4.x only SHELLB.COM - COMMAND.COM INTERFACE AX = 1902h ES:DI -> ASCIZ full filename of current batch file, with at least the final filename element uppercased DS:DX -> buffer for results Return: AL = 00h failed, either (a) final filename element quoted at ES:DI does not match identity of shell batch file quoted as parameter of most recent call of SHELLB command, or (b) no more Program Start Commands available. AL= FFh success, then: memory at DS:[DX+1] onwards filled as: DX+1: BYTE count of bytes of PSC DX+2: N BYTEs Program Start Command text BYTE 0Dh terminator Desc: COMMAND.COM executes the result of this call in preference to reading a command from a batch file. Thus the batch file does not advance in execution for so long as SHELLB provides PSCs from its workspace. Note: The PSCs are planted in SHELLB workspace by SHELLC, the user menu interface. The final PSC of a sequence is finished with a GOTO COMMON, which causes a loop back in the batch file which called SHELLC so as to execute SHELLC again. The check on batch file name permits PSCs to CALL nested batch files while PSCs are still stacked up for subsequent execution. --------l-2F1903----------------------------- INT 2F U - DOS 4.x only SHELLB.COM - COMMAND.COM interface AX = 1903h ES:DI -> ASCIZ batch file name as for AX=1902h Return: AL = status FFh quoted batch file name matches last SHELLB parameter 00h it does not --------l-2F1904----------------------------- INT 2F U - DOS 4.x only SHELLB.COM - SHELLB transient to TSR intrface AX = 1904h Return: ES:DI -> name of current shell batch file: WORD number of bytes of name following BYTEs (8 max) uppercase name of shell batch file --------V-2F1A00----------------------------- INT 2F - DOS 4+ ANSI.SYS - INSTALLATION CHECK AX = 1A00h Return: AL = FFh if installed Notes: AVATAR.SYS also responds to this call documented for DOS 5+, but undocumented for DOS 4.x --------V-2F1A00BX414E----------------------- INT 2F - ANSIPLUS.SYS v2.00+ - INSTALLATION CHECK AX = 1A00h BX = 414Eh ('AN') CX = 5349h ('SI') DX = 2B2Bh ('++') Return: AL = FFh if installed CF clear ES:BX -> INT 29 entry point CX = ANSIPLUS BCD version number (v3.10+, CH=major, CL=minor) DL = capabilities (v4.00+) 00h full capability driver 01h reduced capability driver 2Bh full capability driver (before v4.00) Program: ANSIPLUS.SYS is a CON device driver by Kristofer Sweger which replaces the normal ANSI.SYS is a more powerful version with many additional features Notes: ANSIPLUS also identifies itself as ANSI.SYS if BX,CX, or DX differ from the magic values above an additional installation check is to test for the signature "ANSIPLUS" 12 bytes before the INT 29 entry point; the version number is also available as a four-character ASCII string (e.g. "4.00") four bytes before the entry point SeeAlso: AX=1AA5h,AX=1AA6h,AX=1AA7h,AX=1AA8h,AX=1AA9h,AX=1AAAh,AX=D44Fh --------V-2F1A00BX4156----------------------- INT 2F - AVATAR.SYS - INSTALLATION CHECK AX = 1A00h BX = 4156h ('AV') CX = 4154h ('AT') DX = 4152h ('AR') Return: AL = FFh if installed CF clear BX = AVATAR protocol level supported CX = driver type 0000h AVATAR.SYS 4456h DVAVATAR.COM inside DESQview window DX = 0016h Program: AVATAR.SYS is a CON replacement by George Adam Stanislav which interprets AVATAR command codes in the same way that ANSI interprets ANSI command codes Notes: AVATAR also identifies itself as ANSI.SYS if BX, CX, or DX differ from the magic values SeeAlso: AX=1A21h,AX=1A3Ch,AX=1A3Fh,AX=1A52h,AX=1A72h,AX=1A7Dh,AX=1AADh"AVATAR" --------V-2F1A01----------------------------- INT 2F U - DOS 4+ ANSI.SYS internal - GET/SET DISPLAY INFORMATION AX = 1A01h CL = function 7Fh for GET 5Fh for SET DS:DX -> parm block as for INT 21,AX=440Ch,CX=037Fh/035Fh respectively Return: CF clear if successful AX destroyed CF set on error AX = error code (many non-standard) Note: presumably this is the DOS IOCTL interface to ANSI.SYS SeeAlso: AX=1A02h,INT 21/AX=440Ch --------V-2F1A02----------------------------- INT 2F U - DOS 4+ ANSI.SYS internal - MISCELLANEOUS REQUESTS AX = 1A02h DS:DX -> parameter block (see #1456) Return: CF clear if successful CF set on error AX = error code Note: DOS 5+ chains to previous handler if AL > 02h on call SeeAlso: AX=1A01h Format of ANSI.SYS parameter block: Offset Size Description (Table 1456) 00h BYTE subfunction 00h set/reset interlock 01h get /L flag 01h BYTE interlock state 00h=reset, 01h=set This interlock prevents some of the ANSI.SYS post-processing in its hook onto INT 10, AH=00h mode set 02h BYTE (returned) 00h if /L not in effect 01h if /L in effect --------V-2F1A21----------------------------- INT 2F - AVATAR.SYS - SET DRIVER STATE AX = 1A21h (AL='!') DS:SI -> command string with one or more state characters (see #1457) CX = length of command string Return: CF set on error (invalid subfunction) CF clear if successful Note: the characters in the state string are interpreted left to right, and need not be in any particular order SeeAlso: AX=1A00h/BX=4156h,AX=1A3Fh (Table 1457) Values for AVATAR.SYS state characters: 'a' activate driver 'd' disable driver 'f' use fast screen output 'g' always convert gray keys (+ and -) to function keys 'G' never convert gray keys 'l' convert gray keys only when ScrollLock active 's' use slow screen output 't' Tandy 1000 keyboard (not yet implemented) --------V-2F1A3C----------------------------- INT 2F U - AVATAR.SYS v0.11 - ??? AX = 1A3Ch ??? Return: CX = 0000h SeeAlso: AX=1A00h/BX=4156h,AX=1A21h,AX=1A3Eh --------V-2F1A3E----------------------------- INT 2F U - AVATAR.SYS v0.11 - ??? AX = 1A3Eh CL = ??? CH = ??? DL = ??? DH = ??? Return: CL = ??? CH = ??? DL = ??? DH = ??? SeeAlso: AX=1A3Ch,AX=1A3Fh --------V-2F1A3F----------------------------- INT 2F - AVATAR.SYS - QUERY DRIVER STATE AX = 1A3Fh (AL='?') ES:DI -> buffer CX = length of buffer in bytes Return: CF clear CX = actual size of returned info Note: the returned information consists of multiple letters whose meanings are described under AX=1A21h SeeAlso: AX=1A00h/BX=4156h,AX=1A21h,AX=1A44h --------S-2F1A42BX4156----------------------- INT 2F - AVATAR Serial Dispatcher - INSTALL IRQ3 HANDLER AX = 1A42h BX = 4156h ('AV') ES:DI -> FAR handler for serial port using IRQ3 DS = data segment needed by handler Return: AX = status/return value 0000h if no more room 1A42h if ASD not installed else handle to use when uninstalling Notes: the handler need not save/restore registers or signal EOI to the interrupt controller the handler should return AX=0000h if the interrupt was meant for it, and either leave AX unchanged or return a non-zero value otherwise the most recently installed handler will be called first, continuing to earlier handlers until one returns AX=0000h SeeAlso: AX=1A43h,AX=1A62h --------S-2F1A43BX4156----------------------- INT 2F - AVATAR Serial Dispatcher - INSTALL IRQ4 HANDLER AX = 1A43h BX = 4156h ('AV') ES:DI -> FAR handler for serial port using IRQ4 DS = data segment needed by handler Return: AX = status/return value 0000h if no more room 1A43h if ASD not installed else handle to use when uninstalling Notes: (see AX=1A42h) SeeAlso: AX=1A42h,AX=1A63h --------V-2F1A44BX4156----------------------- INT 2F - AVATAR.SYS v0.11+ - GET DATA SEGMENT AX = 1A44h BX = 4156h ('AV') Return: AX = 0000h DS = data segment CX = size of data segment Note: AVATAR.SYS calls this function whenever it is invoked. If each process under a multitasker hooks this function and provides a separate data segment, AVATAR.SYS becomes fully reentrant. SeeAlso: AX=1A21h,AX=1A3Fh,AX=1A52h --------V-2F1A52----------------------------- INT 2F U - AVATAR.SYS v0.11 - GET ??? AX = 1A52h CX = size of buffer ES:DI -> buffer Return: ??? copied into user buffer Note: the maximum size of the data which may be copied is returned by AX=1A72h SeeAlso: AX=1A53h,AX=1A72h --------V-2F1A53----------------------------- INT 2F U - AVATAR.SYS v0.11 - ??? AX = 1A53h CL = ??? (00h-05h) ??? Return: ??? SeeAlso: AX=1A00h/BX=4156h,AX=1A52h,AX=1A72h --------S-2F1A62BX4156----------------------- INT 2F - AVATAR Serial Dispatcher - UNINSTALL IRQ3 HANDLER AX = 1A62h BX = 4156h ('AV') CX = handle for IRQ routine returned by AX=1A42h SeeAlso: AX=1A42h,AX=1A63h --------S-2F1A63BX4156----------------------- INT 2F - AVATAR Serial Dispatcher - UNINSTALL IRQ4 HANDLER AX = 1A63h BX = 4156h ('AV') CX = handle for IRQ routine returned by AX=1A43h SeeAlso: AX=1A43h,AX=1A62h --------V-2F1A72----------------------------- INT 2F U - AVATAR.SYS v0.11 - GET ??? SIZE AX = 1A72h Return: CX = maximum size of ??? SeeAlso: AX=1A00h/BX=4156h,AX=1A52h,AX=1A7Bh,AX=1AADh"AVATAR" --------V-2F1A7B----------------------------- INT 2F U - AVATAR.SYS v0.11 - ??? AX = 1A7Bh Return: AX = 0000h CX = 0000h SeeAlso: AX=1A00h/BX=4156h,AX=1A72h,AX=1A7Dh --------V-2F1A7D----------------------------- INT 2F U - AVATAR.SYS v0.11 - ??? AX = 1A7Dh Return: AX = ??? SeeAlso: AX=1A00h/BX=4156h,AX=1A7Bh --------V-2F1AA5----------------------------- INT 2F - ANSIPLUS v4.00+ - GET/SET ANSIPLUS CLIPBOARD AX = 1AA5h DH = subfunction 00h get clipboard information 01h get clipboard text 02h set clipboard text 03h append text to clipboard 04h clear clipboard 05h paste clipboard to keyboard ES:BX -> data area for subfunctions 01h, 02h, and 03h CX = size of data area (maximum size for subfunction 01h, actual size to add to clipboard for subfunctions 02h and 03h) Return: AL = status 00h successful 01h unsupported subfunction (reduced capability driver) 02h insufficient space A5h unsupported function (ANSIPLUS before v4.00) ES:BX -> ANSIPLUS local clipboard data CX = number of bytes currently in local clipboard DX = maximum size of local clipboard SeeAlso: AX=1A00h/BX=414Eh,AX=1AA6h --------V-2F1AA6----------------------------- INT 2F - ANSIPLUS v4.00+ - ENABLE/DISABLE ANSIPLUS DRIVER AX = 1AA6h BH = function 00h get hooked interrupts 01h set hooked interrupts mask BL = new interrupts mask (see #1458) Return: BL = previous interrupts mask (see #1458) SeeAlso: AX=1A00h/BX=414Eh,AX=1AA7h Desc: used to temporarily disable any prior copies of ANSIPLUS when a new copy is installed, such as in a multitasking system like DESQview Note: only the most-recently loaded copy of ANSIPLUS on the current INT 2F chain responds to this call Bitfields for ANSIPLUS hooked interrupts mask: Bit(s) Description (Table 1458) 0 INT 09 hook disabled 1 INT 10 hook disabled 2 INT 15 hook disabled 3 INT 16 hook disabled 4 INT 1C hook disabled 5 reset all bits when INT 29 called 6 INT 29 hook disabled 7 INT 33, INT 74, or other mouse event hook disabled --------V-2F1AA7----------------------------- INT 2F - ANSIPLUS v4.00+ - ENABLE/DISABLE ANSIPLUS FEATURES AX = 1AA7h BL = function 00h prevent scroll-back saves 01h enable scroll-back saves 02h disable key reprogramming and lock changes by escape sequences 03h enable key reprogramming by escape sequences 04h disable and lock key stacking changes by escape sequences 05h allow key stacking by escape sequences Return: nothing SeeAlso: AX=1AA6h --------V-2F1AA8----------------------------- INT 2F - ANSIPLUS v3.10+ - GET NEXT ANSIPLUS SCROLLBACK LINE AX = 1AA8h Return: AL = status 00h successful ES:BX -> screen line (character and attribute pairs) CX = length of line in bytes, 0000h if no more lines or unsupported video mode 01h unsupported video mode active 02h screen currently scrolled back 03h reduced capability driver A8h unsupported function (driver before v3.10) SeeAlso: AX=1A00h/BX=414Eh,AX=1AA9h --------V-2F1AA9----------------------------- INT 2F - ANSIPLUS v3.10+ - GET ANSIPLUS SCROLLBACK INFORMATION AX = 1AA9h Return: AL = status 00h successful BX = current number of lines in scrollback buffer CX = number of bytes in one line 01h unsupported video mode active 02h screen currently scrolled back 03h reduced capability driver A9h unsupported function (driver before v3.10) Desc: determine how much data is in the scrollback buffer and initialize scrollback retrieval to return the first line on the next call to AX=1AA8h SeeAlso: AX=1A00h/BX=414Eh,AX=1AA8h --------V-2F1AAA----------------------------- INT 2F - ANSIPLUS v3.01+ - GET/SET ANSIPLUS SCREEN SAVER BLANKING TIME AX = 1AAAh BX = function FFFFh to get current blanking time other to set time CX = blanking time in clock ticks (0000h-7FFFh) Return: BX = current blanking time CX = blanking time when last set SeeAlso: AX=1A00h/BX=414Eh,AX=1AABh --------V-2F1AAB----------------------------- INT 2F - ANSIPLUS v3.01+ - SET ANSIPLUS KEY REPEAT RATE AX = 1AABh BX = repeat rate in characters per second 0000h use BIOS repeat rate Return: nothing SeeAlso: AX=1A00h/BX=414Eh,AX=1AAAh,AX=1AACh --------V-2F1AAC----------------------------- INT 2F - ANSIPLUS v3.00+ - LOAD CHARACTER GENERATOR AX = 1AACh BH = number of bytes per character pattern BL = VGA/EGA character table to be loaded CX = number of characters to load DX = starting character code (offset into Map2 block) ES:BP -> user character table to be loaded Return: AX = 1100h Desc: load the EGA/VGA character generator without the BIOS function's side effects of resetting the video mode and color palette SeeAlso: AX=1A00h/BX=414Eh,AX=1AABh,AX=1AADh"ANSIPLUS",INT 10/AX=1100h --------V-2F1AAD----------------------------- INT 2F - ANSIPLUS v2.00+ - ANSIPLUS DEVICE STATUS REPORT AX = 1AADh BL = report request code (81h-96h for v4.00) CX = color selector or key code, if required by request Return: AX = first reported result BX = second result CX = third result, if applicable (unchanged otherwise) DX = fourth result, if applicable (unchanged otherwise) Desc: get device status reports equivalent to those for Esc [#n sequences while bypassing any device redirection and avoiding the need to parse the returned result Note: the report request code in BL is identical to the number in the corresponding Esc [#n sequence SeeAlso: AX=1A00h/BX=414Eh,AX=1AACh --------V-2F1AADDX0000----------------------- INT 2F U - AVATAR.SYS v0.11 - ??? AX = 1AADh DX = 0000h CX = subfunction (00h-0Ch) ??? Return: AX = 0000h if DX was nonzero ??? SeeAlso: AX=1A00h/BX=4156h,AX=1A72h --------V-2F1AAC----------------------------- INT 2F - ANSIPLUS v3.00+ - LOAD CHARACTER GENERATOR AX = 1AACh --------m-2F1B00----------------------------- INT 2F U - DOS 4+ XMA2EMS.SYS extension internal - INSTALLATION CHECK AX = 1B00h Return: AL = FFh if installed Note: XMA2EMS.SYS extension is only installed if DOS has page frames to hide. This extension hooks onto INT 67/AH=58h and returns from that call data which excludes the physical pages being used by DOS. SeeAlso: AH=1Bh"FRAME INFO" --------m-2F1B------------------------------- INT 2F U - DOS 4+ XMA2EMS.SYS extension internal - GET HIDDEN FRAME INFORMATION AH = 1Bh AL <> 00h DI = hidden physical page number Return: AX = FFFFh if failed (no such hidden page) AX = 0000h if OK, then ES = segment of page frame DI = physical page number Notes: this corresponds to the data edited out of the INT 67/AH=58h call FASTOPEN makes this call with AL = FFh SeeAlso: AX=1B00h --------V-2F2300----------------------------- INT 2F - DR-DOS 5.0 GRAFTABL - INSTALLATION CHECK AX = 2300h Return: AH = FFh Note: this installation check does not follow the usual format SeeAlso: AH=23h,AX=2E00h --------V-2F23------------------------------- INT 2F - DR-DOS 5.0 GRAFTABL - GET GRAPHICS DATA AH = 23h AL nonzero Return: AH = FFh ES:BX -> graphics data (8 bytes for each character from 80h to FFh) SeeAlso: AX=2300h,AX=2E00h --------T-2F2700----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - INSTALLATION CHECK AX = 2700h Return: AL = status 00h not installed FFh installed Note: the TaskMAX API is also supported by Novell DOS 7 TASKMGR in taskswitching mode --------T-2F2701----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - GET STATUS AX = 2701h Return: AX = maximum simultaneous tasks BX = index into TASK_IDS of current foreground task CX = currently-active tasks DX = version number (DL = major, DH = minor) (DR-DOS 6.0 = 0001h, Novell DOS 7 = 0002h) ES:SI -> TASK_IDS ES:DI -> name table (array of 8-byte names, NUL-terminated if <8 chars) Notes: do not attempt to create a new task if CX == AX the task's index is its position on the task menu, while its ID is the position within the internal task name table SeeAlso: AX=2714h,AX=2716h --------T-2F2702----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - GET PER-TASK EMS LIMIT AX = 2702h Return: DX = maximum pages INT 67/AH=42h will report available Note: TaskMAX does not limit EMS allocations other than by limiting the amount which is reported as being available at a given time SeeAlso: AX=2703h,INT 67/AH=42h --------T-2F2703----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - SET PER-TASK EMS LIMIT AX = 2703h DX = maximum pages INT 67/AH=42h should report available Return: DX = new maximum for reporting Note: the TaskMAX API is also supported by Novell DOS 7 TASKMGR in taskswitching mode SeeAlso: AX=2702h,INT 67/AH=42h --------T-2F2704----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - REGISTER/UNREGISTER TASK MANAGER AX = 2704h DL = subfunction 00h unregister task manager 01h register task manager Return: DL = status 00h registered 01h unregistered Notes: a task manager replaces TaskMAX's menu system with its own user interface; while one is registered, the TaskMAX hotkeys and Ctrl-Alt-Del invoke the manager rather than the built-in menu system unregister the task manager before terminating it SeeAlso: AX=2705h Index: hotkeys;TaskMAX --------T-2F2705----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - ENABLE/DISABLE DIRECT SWITCHING AX = 2705h DL = subfunction 00h disable keystrokes for switching to next/prev/specified task 01h enable Return: nothing Note: should only be called by a registered task manager (see AX=2704h) SeeAlso: AX=2704h,AX=2706h --------T-2F2706----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - SWITCH TO SPECIFIED TASK AX = 2706h DX = task index (see AX=2701h) of task to be activated Return: DX = task index of previously-active task Note: the TaskMAX API is also supported by Novell DOS 7 TASKMGR in taskswitching mode SeeAlso: AX=2705h,AX=2707h,AX=2715h --------T-2F2707----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - CREATE NEW TASK AX = 2707h DS:DX -> ASCIZ pathname of executable ES:BX -> parameter block (see #1459) CX = number of ticks before automatic return to task manager (0000h = run until termination or explicitly switched) Return: DX = new task's task index (FFFFh if task terminated) SeeAlso: AX=2706h,AX=2708h Format of TaskMAX parameter block: Offset Size Description (Table 1459) 00h WORD reserved, should be 0000h 02h DWORD pointer to command tail to be copied into child's PSP 06h DWORD pointer to first FCB to be copied into child's PSP 0Ah DWORD pointer to second FCB to be copied into child's PSP --------T-2F2708----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - DELETE TASK AX = 2708h DX = task index Return: DX = FFFFh (task deleted) Notes: this call should only be used for abnormal task termination, after first checking for open files with AX=270Ch; should not be used with programs that allocate EMS or XMS memory switches to specified task first SeeAlso: AX=2707h --------T-2F2709----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - NAME TASK AX = 2709h DX = task index DS:SI -> 8-byte name (8 NULs = remove name) Return: AL = task flags 00h ID unused or task terminated 01h ID in use, task name table entry valid 81h ID in use, task name fixed BX = task ID ES:DI -> name in task name table (see AX=2701h) Note: the task retains the given name until it terminates or the name is removed by specifying a name of 8 NULs. SeeAlso: AX=2701h,AX=2707h --------T-2F270A----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - CONVERT TASK INDEX TO TASK ID AX = 270Ah DX = task index Return: DX = task ID (FFFFh if index invalid) Note: task IDs stay constant, while indexes can change when other tasks are deleted SeeAlso: AX=2701h,AX=270Bh --------T-2F270B----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - CONVERT TASK ID TO TASK INDEX AX = 270Bh DX = task ID Return: DX = task index (FFFFh if task not active) Note: the TaskMAX API is also supported by Novell DOS 7 TASKMGR in taskswitching mode SeeAlso: AX=270Ah --------T-2F270C----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - CHECK OPEN FILES AX = 270Ch DX = task index Return: AX = number of files currently open for specified task SeeAlso: AX=2708h --------T-2F270D----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - CHECK IF TASK RUNNING PRIMARY COMMAND INTERPRETER AX = 270Dh DX = task index Return: DX = status 0000h if primary command interpreter (COMMAND.COM, etc.) running 0001h if not in root shell for task Note: TaskMAX will return 0001h if the specified task has spawned another command interpreter with AX=2707h SeeAlso: AX=2707h,AX=270Ch --------T-2F270E----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - GET/SET TEXT PASTE LEAD-IN AX = 270Eh CX = length of string (max 15 keystrokes, 0000h to get current string) DS:SI -> pasting lead-in string (character/scan-code pairs) Return: ES:DI -> current lead-in string Note: the specified sequence of keystrokes is sent to the application before every line of a text-mode spreadsheet paste SeeAlso: AX=270Fh,AX=2710h,AX=2713h --------T-2F270F----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - GET/SET NUMERIC PASTE LEAD-IN AX = 270Fh CX = length of string (max 15 keystrokes, 0000h to get current string) DS:SI -> pasting lead-in string (character/scan-code pairs) Return: ES:DI -> current lead-in string Note: the specified sequence of keystrokes is sent to the application before every number in a numeric-mode spreadsheet paste SeeAlso: AX=270Eh,AX=2710h,AX=2711h,AX=2713h --------T-2F2710----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - GET/SET PASTE LINE TERMINATOR STRING AX = 2710h CX = length of string (max 15 keystrokes, 0000h to get current string) DS:SI -> pasting terminator string (character/scan-code pairs) Return: ES:DI -> current terminator string Note: the specified sequence of keystrokes is sent to the application after every line of a spreadsheet paste operation SeeAlso: AX=270Eh,AX=270Fh,AX=2713h --------T-2F2711----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - GET/SET NUMERIC PASTE DECIMAL POINT AX = 2711h DX = ASCII code for separator (FFFFh to get current) Return: DL = current separator character SeeAlso: AX=270Fh --------T-2F2712----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - INITIATE EXPORTING TASK DATA AX = 2712h DX = task index --------T-2F2713----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - INITIATE PASTE OPERATION AX = 2713h DX = task index CX = paste mode 0000h alphanumeric 0001h numeric 0002h text SeeAlso: AX=270Eh,AX=270Fh,AX=2710h,AX=2711h --------T-2F2714----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - GET SWAP SPACE INFO AX = 2714h Return: CX = total KB of swap space DX = available KB of swap space SeeAlso: AX=2701h --------T-2F2715----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - SWITCH TO TASK MANAGER AX = 2715h Return: only after calling task is again selected SeeAlso: AX=2706h --------T-2F2716----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - GET PASTE BUFFER STATUS AX = 2716h Return: AX = 0000h if AX=2716h,AX=2717h,AX=2718h supported CX = bytes in paste buffer DX = current generation number (updated after every copy operation) SeeAlso: AX=2701h,AX=2713h,AX=2714h,AX=2717h,AX=2718h --------T-2F2717----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - PASTE DATA DIRECTLY TO APPLICATION BUFFER AX = 2717h CX = bytes in destination buffer ES:DI -> destination buffer Return: AX = 0000h if function supported CX = bytes actually copied (FFFFh if buffer too small) DX = current generation number for paste buffer Note: the destination buffer may be too small if another task adds more data to the paste buffer after the AX=2716h call but before this call SeeAlso: AX=2713h,AX=2716h,AX=2718h --------T-2F2718----------------------------- INT 2F - DR-DOS 6.0 TaskMAX - COPY DATA DIRECTLY INTO PASTE BUFFER AX = 2718h CX = bytes in source buffer DS:SI -> source buffer (plain ASCII, lines terminated with CR LF) Return: AX = 0000h if function supported CX = bytes actually copied DX = current generation number for paste buffer SeeAlso: AX=2712h,AX=2716h,AX=2717h --------T-2F2719----------------------------- INT 2F - Novell DOS 7 TaskMGR - NOP AX = 2719h to 271Bh --------T-2F271C----------------------------- INT 2F U - Novell DOS 7 TaskMGR - ??? AX = 271Ch DX = ??? bit 0: ??? Return: ??? ---if DX bit 0 set--- AX = 0031h CX = 0000h BUG: if the task switcher is running, and DX bit 0 is set on call, this function will crash because its exit code attempts to pop several registers which are not pushed when DX bit 0 is set --------m-2F2780CL01------------------------- INT 2F U - Novell DOS 7 - EMM386.EXE - MULTITASKING API AX = 2780h CL = 01h (function number) CH = subfunction 00h unused Return: CX = status (0002h) (see #1460) 01h unused Return: CX = status (0002h) (see #1460) 02h ??? BX = ??? (0005h-000Fh) Return: CX = status (0000h,0030h) (see #1460) 03h allocate ??? DX = ??? Return: CX = status (0000h,0003h) (see #1460) 04h get ??? Return: CX = 0000h (successful) BX = selector for EMM386 data segment EBX high word cleared 05h ??? EDX = ??? Return: ??? 06h return to real mode via triple fault 07h debugger break Note: calls INT 03, then INT 21/AH=02h to output a question mark 08h get ??? Return: CX = 0000h (successful) EBX = ??? (0 or 2) 09h ??? 0Ah ??? 0Bh unused Return: CX = status (0002h) (see #1460) 0Ch ??? manipulates DOS memory chain 0Dh ??? EBX = ??? EDX = ??? Return: ??? 0Eh ??? Return: CX = 0000h (successful) BL = ??? \ or BX = 0000h BH = ??? / 0Fh get ??? Return: CX = 0000h (successful) EBX = ??? 10h get and set ??? EDX = ??? Return: CX = 0000h (successful) EBX = old value of ??? 11h get ??? Return: CX = 0000h (successful) EBX = ??? (0100h) 12h get and set ??? DX = ??? Return: CX = 0000h (successful) AX = old value of ??? 13h ??? Return: CX = status (0000h,003Fh) (see #1460) AX = ??? 14h ??? EDX = ??? Return: CX = status (0000h,003Fh) (see #1460) 15h ??? BX = segment of ??? Return: CX = 0000h (successful) BX = segment of ??? 16h ??? 17h ??? EBX = subfunction (0-2) Return: CX = status (0002h if EBX>2) (see #1460) ??? 18h unused Return: CX = status (0002h) (see #1460) Return: CX = status (most subfunctions) (E)AX and/or (E)BX contain return values, depending on function Notes: called by DPMS.EXE and EMM386.EXE this API is only available if AX=12FFh/BX=0EDCh returns successfully; because the request is handled on the initial trap to the memory manager caused by INT instructions, this API must be invoked with an actual INT 2F instruction instead of some simulation such as a far call to the address in the interrupt vector table SeeAlso: AX=12FF/BX=0EDCh,AX=2780h/CL=02h,AX=2780h/CL=03h,AX=2780h/CL=04h (Table 1460) Values for Novell DOS 7 EMM386 function status: 0000h successful 0001h invalid function??? 0002h invalid subfunction 0003h ??? 0004h invalid ??? index 0005h ??? 0006h ??? 0007h ??? 0009h ??? 000Ah ??? 000Bh invalid ??? handle 000Ch ??? 000Dh ??? 000Eh ??? 000Fh ??? 0014h ??? 0023h ??? 0030h ??? 003Fh ??? --------m-2F2780CL02------------------------- INT 2F U - Novell DOS 7 - EMM386.EXE - MULTITASKING API AX = 2780h CL = 02h (function number) CH = subfunction 00h ??? ??? Return: CX = status (0000h,0023h, others???) (see #1460) BX = ??? (0000h if CX=0000h, FFFFh if CX=0023h) Note: calls func 04h/sf 03h, func 04h/sf 1Eh,func 02h/sf 43h, func 02h/sf 0Bh, and func 04h/sf 01h 01h get and clear ??? DX = ??? handle or 0000h for default Return: CX = status (0000h,000Bh) (see #1460) EBX = old value of ??? if successful EDX destroyed 02h ??? DX = index of ??? Return: CX = status (0000h,0004h,0005h) (see #1460) EBX = 0000FFFFh on error, 00000000h if successful 03h ??? DX = index of ??? Return: CX = status (0000h,0004h,0006h) (see #1460) BX = FFFFh on error, 0000h if successful 04h ??? Return: CX = status (0000h,0007h,000Ah) (see #1460) 05h ??? EDX -> ??? data (first 8 bytes seem to be name) Return: CX = status (0000h,0009h,000Dh) (see #1460) 06h ??? Note: calls fn 02h/subfn 05h, then fn 02h/subfn 40h 07h ??? EDX = ??? Return: CX = status (0000h,0009h,000Eh) (see #1460) 08h ??? EDX = ??? Return: CX = status (0000h,0009h,000Eh) (see #1460) 09h ??? EDX = ??? Return: CX = status (0000h,0009h,000Fh) (see #1460) 0Ah ??? EDX = ??? Return: CX = status (0000h,0009h,000Fh) (see #1460) 0Bh ??? DX = ??? Return: CX = 0000h (successful) 0Ch ??? Return: CX = 0000h (successful) 0Dh ??? Return: CX = status (0000h,0023h) (see #1460) BX = FFFFh on error, 0000h if successful Note: calls fn 04h/subfn 03h, fn 04h/subfn 1Eh, fn 02h/subfn 43h, fn 02h/subfn 0Bh, fn 04h/sub 01h 0Eh ??? ??? Return: CX = status (0000h,000Ch) (see #1460) EBX = ??? if successful 0Fh ??? BX = ??? DX = ??? handle or 0000h for default Return: CX = status (0000h,000Bh) (see #1460) 10h get ??? handle Return: CX = 0000h (successful) BX = handle of default ??? EBX high word cleared 11h ??? DX = ??? handle or 0000h for default BX = ??? (handle???) Return: CX = status (0000h,000Bh,0014h) (see #1460) 12h ??? BX = ??? DX = ??? Return: CX = 0000h (successful) 13h ??? DX = ??? Return: CX = status (see #1460) 14h ??? BX = ??? DX = ??? Return: CX = status (0000h,0014h) (see #1460) BX = FFFFh on error, ??? if successful 15h set ??? flags BX = ??? (low two bits only) DX = ??? handle or 0000h for default Return: CX = status (0000h,000Bh) (see #1460) BX = new value of ??? flags (entire word) EBX high register cleared 16h clear ??? flag for default ??? Return: CX = 0000h (successful) 17h ??? 18h ??? 19h ??? 1Ah ??? 1Bh ??? 1Ch ??? 1Dh ??? 1Eh ??? 1Fh ??? 20h ??? 21h ??? 22h ??? 23h ??? 24h ??? 25h ??? 26h ??? 27h ??? 28h ??? 29h ??? 2Ah ??? 2Bh ??? 2Ch ??? 2Dh ??? 2Eh ??? 2Fh ??? 30h ??? 31h ??? 32h ??? 33h ??? 34h ??? 35h ??? 36h ??? 37h ??? 38h ??? 39h ??? 3Ah ??? 3Bh ??? 3Ch ??? 3Eh ??? 3Fh ??? 40h ??? 41h ??? 42h ??? 43h ??? 44h ??? 45h ??? 46h ??? 47h ??? Return: CX = status (most subfunctions) (E)AX and/or (E)BX contain return values, depending on function Notes: called by DPMS.EXE and EMM386.EXE this API is only available if AX=12FFh/BX=0EDCh returns successfully; because the request is handled on the initial trap to the memory manager caused by INT instructions, this API must be invoked with an actual INT 2F instruction instead of some simulation such as a far call to the address in the interrupt vector table SeeAlso: AX=12FF/BX=0EDCh,AX=2780h/CL=01h,AX=2780h/CL=03h,AX=2780h/CL=04h --------m-2F2780CL03------------------------- INT 2F U - Novell DOS 7 - EMM386.EXE - MULTITASKING API AX = 2780h CL = 03h (function number) CH = subfunction 00h ??? 01h ??? 02h ??? 03h ??? 04h ??? 05h ??? 06h ??? 07h ??? 08h ??? 09h ??? 0Ah ??? 0Bh ??? 0Ch ??? 0Dh ??? 0Eh ??? 0Fh ??? 10h ??? 11h ??? 12h ??? 13h ??? 14h ??? 15h ??? 16h ??? 17h ??? 18h ??? 19h ??? 1Ah ??? 1Bh ??? 1Ch ??? 1Dh ??? 1Eh ??? 1Fh ??? 20h ??? 21h ??? 22h ??? 23h ??? 24h ??? 25h ??? 26h ??? 27h ??? 28h ??? 29h ??? 2Ah ??? 2Bh ??? 2Ch ??? 2Dh ??? 2Eh ??? 2Fh ??? 30h ??? 31h ??? 32h ??? 33h ??? 34h ??? 35h ??? 36h ??? 37h ??? Return: CX = status (most subfunctions) (E)AX and/or (E)BX contain return values, depending on function Notes: called by DPMS.EXE and EMM386.EXE this API is only available if AX=12FFh/BX=0EDCh returns successfully; because the request is handled on the initial trap to the memory manager caused by INT instructions, this API must be invoked with an actual INT 2F instruction instead of some simulation such as a far call to the address in the interrupt vector table SeeAlso: AX=12FF/BX=0EDCh,AX=2780h/CL=01h,AX=2780h/CL=02h,AX=2780h/CL=04h --------m-2F2780CL04------------------------- INT 2F U - Novell DOS 7 - EMM386.EXE - MULTITASKING API AX = 2780h CL = 04h (function number) CH = subfunction 00h ??? 01h ??? 02h ??? 03h ??? 04h ??? 05h ??? 06h ??? 07h ??? 08h ??? 09h ??? 0Ah ??? 0Bh ??? 0Ch ??? 0Dh ??? 0Eh ??? 0Fh ??? 10h ??? 11h ??? 12h ??? 13h ??? 14h ??? 15h ??? 16h ??? 17h ??? 18h ??? 19h ??? 1Ah ??? 1Bh ??? 1Ch ??? 1Dh ??? 1Eh ??? 1Fh ??? 20h ??? 21h ??? 22h ??? 23h ??? 24h ??? 25h ??? 26h ??? 27h ??? 28h ??? 29h ??? 2Ah ??? 2Bh ??? 2Ch ??? 2Dh ??? 2Eh ??? 2Fh ??? 30h ??? 31h ??? 32h ??? Return: CX = status (most subfunctions) (E)AX and/or (E)BX contain return values, depending on function Notes: called by DPMS.EXE and EMM386.EXE this API is only available if AX=12FFh/BX=0EDCh returns successfully; because the request is handled on the initial trap to the memory manager caused by INT instructions, this API must be invoked with an actual INT 2F instruction instead of some simulation such as a far call to the address in the interrupt vector table SeeAlso: AX=12FF/BX=0EDCh,AX=2780h/CL=01h,AX=2780h/CL=02h,AX=2780h/CL=03h --------m-2F2780CL05------------------------- INT 2F U - Novell DOS 7 - EMM386.EXE - MULTITASKING API AX = 2780h CL = 05h ??? Return: ??? Notes: called by DPMS.EXE and EMM386.EXE the handler for this function may be set by one of the subfunctions of AX=2780h/CL=01h; the default handler returns AX=BX=FFFFh and CX=0001h (see #1460) this API is only available if AX=12FFh/BX=0EDCh returns successfully; because the request is handled on the initial trap to the memory manager caused by INT instructions, this API must be invoked with an actual INT 2F instruction instead of some simulation such as a far call to the address in the interrupt vector table SeeAlso: AX=12FF/BX=0EDCh,AX=2780h/CL=01h,AX=2780h/CL=02h,AX=2780h/CL=03h --------m-2F2780CL06------------------------- INT 2F U - Novell DOS 7 - EMM386.EXE - MULTITASKING API AX = 2780h CL = 06h ??? Return: ??? Notes: called by DPMS.EXE and EMM386.EXE the handler for this function may be set by one of the subfunctions of AX=2780h/CL=01h; the default handler returns AX=BX=FFFFh and CX=0001h (see #1460) this API is only available if AX=12FFh/BX=0EDCh returns successfully; because the request is handled on the initial trap to the memory manager caused by INT instructions, this API must be invoked with an actual INT 2F instruction instead of some simulation such as a far call to the address in the interrupt vector table SeeAlso: AX=12FF/BX=0EDCh,AX=2780h/CL=01h,AX=2780h/CL=02h,AX=2780h/CL=03h --------m-2F2780----------------------------- INT 2F U - Novell DOS 7 - EMM386.EXE - MULTITASKING API AX = 2780h CL = function (07h-0Fh) ??? Return: ??? Notes: called by DPMS.EXE and EMM386.EXE the handlers for each of these functions may be set individually by one of the subfunctions of AX=2780h/CL=01h; the default handlers return with all registers unchanged this API is only available if AX=12FFh/BX=0EDCh returns successfully; because the request is handled on the initial trap to the memory manager caused by INT instructions, this API must be invoked with an actual INT 2F instruction instead of some simulation such as a far call to the address in the interrupt vector table SeeAlso: AX=12FF/BX=0EDCh,AX=2780h/CL=01h,AX=2780h/CL=02h,AX=2780h/CL=03h --------T-2F2781----------------------------- INT 2F U - Novell DOS 7 TaskMGR - BEGIN CRITICAL SECTION??? AX = 2781h Return: ??? SeeAlso: AX=2782h --------T-2F2782----------------------------- INT 2F U - Novell DOS 7 TaskMGR - END CRITICAL SECTION??? AX = 2782h Return: ??? SeeAlso: AX=2781h --------m-2F2783----------------------------- INT 2F U - Novell DOS 7 - EMM386.EXE - GET ??? AX = 2783h Return: AX = ??? BX = ??? --------T-2F278F----------------------------- INT 2F U - Novell DOS 7 TaskMGR - ??? API AX = 278Fh as for INT 2F/AX=2780h Return: as for INT 2F/AX=2780h Note: Novell DOS 7 TaskMGR passes this call through to INT 2F/AX=2780h without changing any other registers SeeAlso: AX=2780h,AX=2782h --------F-2F2A------------------------------- INT 2F - Gammafax DOS Dispatcher INTERFACE AH = 2Ah Note: details not available at this time SeeAlso: AX=8000h"FaxBIOS",AX=C000h/BX=444Bh,AX=CB00h,AX=CBDDh,INT 66"BitFax" --------V-2F2E00----------------------------- INT 2F U - Novell DOS 7 - GRAFTABL - INSTALLATION CHECK AX = 2E00h Return: AH = FFh if installed Note: this installation check does not follow the usual format of setting AL to FFh SeeAlso: AX=2300h,AH=2Eh"GRAFTABL" --------V-2F2E------------------------------- INT 2F U - Novell DOS 7 - GRAFTABL - GET FONT TABLE AH = 2Eh AL nonzero Return: AH = FFh if installed ES:BX -> graphics data (8 bytes per character from 80h to FFh) SeeAlso: AX=2E00h,AH=23h"GRAFTABL" --------t-2F3900----------------------------- INT 2F - Kingswood TSR INTERFACE - COMPATIBILITY MODE AX = 3900h Return: AL = status 00h not installed FFh one or more TSRs using this interface is installed DX may be destroyed Note: this function is provided to that the multiplex number will appear used to other programs SeeAlso: AH=39h/BL=00h --------t-2F39--BL00------------------------- INT 2F - Kingswood TSR INTERFACE - INSTALLATION CHECK AH = 39h BL = 00h AL = TSR ID number (01h-FFh, currently only 01h-1Bh used) (see #1461) Return: AL = status 00h not installed FFh installed DX = segment address of resident module Note: All of Kingswood Software's TSRs use this interface. Usually the resident module is installed by allocating a block of upper memory, setting its owner ID to 000Ah (used by DOS), and filling the MCB name field with the TSR's name. SeeAlso: #1462,AX=3900h,AH=39h/BL=01h (Table 1461) Values for Kingswood TSR ID number: 01h TSR Windows 02h NOBUSY 03h CD STACK 04h DISK WATCH 05h PUSHBP 06h ALIAS 07h KEYMACRO 08h SLOWDOWN 09h ANSIGRAB 0Ah TEE 0Bh FASTMOUS 0Ch EXTWILD 0Dh BREAKOUT 0Eh STOPDISK 0Fh MEMINIT 10h JANUSEXT 11h CAPS 12h ANSI 13h TRAPPER 14h EATMEM 15h WPJOKE 16h SHOWDOS 17h LOGINTS 18h BLANKVGA 19h SWAPEXEC 1Ah SHELL 1Bh TSRGAMES Format of Kingswood TSR modules: Offset Size Description (Table 1462) 00h 4 BYTEs signature "FTSR" 04h WORD segment address of this module (used to check validity) 06h WORD number of words to skip (usually 0000h if no PSP present) 08h N WORDs module-defined data that must be at a fixed segment offset (usually only a PSP if file access is required) 5N BYTEs interrupt list (see #1463) BYTE FFh terminator Format of Kingswood TSR interrupt list entry: Offset Size Description (Table 1463) 00h BYTE interrupt number (00h-FEh) 01h WORD offset within segment of DWORD pointer to previous interrupt 03h WORD offset within segment of begin of interrupt handler code --------t-2F39--BL01------------------------- INT 2F - Kingswood TSR INTERFACE - REMOVAL CHECK AH = 39h BL = 01h AL = TSR ID number (01h-FFh) (see #1461) Return: AL = status 00h not ready to be removed FFh resident module may be removed by deassigning the interrupts hooked by the TSR and deallocating the TSR's memory block AH,BX,CX,DX,ES may be destroyed SeeAlso: AX=3900h,AH=39h/BL=00h --------t-2F39------------------------------- INT 2F - Kingswood TSR INTERFACE - APPLICATION-SPECIFIC FUNCTION CALLS AH = 39h BL = function number (02h-FFh) AL = TSR ID number (01h-FFh) (see #1461) CX,DX,SI,DI,DS,ES may contain parameters BH reserved for use by the function dispatcher Return: as appropriate for the called function SeeAlso: AX=3900h,AH=39h/BL=00h,AX=3901h/BL=02h --------r-2F3901BL02------------------------- INT 2F - Kingswood TSR Windows - OPEN WINDOW AX = 3901h BL = 02h Return: AX = error code (0000h if successful) SI,DI,DS,ES preserved Notes: opens the next TSR window on top of any others. Only three TSR windows can be opened at any one time. The three windows are all 40x11 characters, partly overlapping. SeeAlso: AH=39h/BL=00h,AX=3901h/BL=03h,AX=3901h/BL=05h,AX=3901h/BL=06h --------r-2F3901BL03------------------------- INT 2F - Kingswood TSR Windows - HIDE WINDOWS AX = 3901h BL = 03h Return: AX = error code (0000h if successful) SI,DI,DS,ES preserved Notes: Hide any visible TSR windows from view. SeeAlso: AH=39h/BL=00h,AX=3901h/BL=02h,AX=3901h/BL=05h --------r-2F3901BL04------------------------- INT 2F - Kingswood TSR Windows - SHOW WINDOWS AX = 3901h BL = 04h Return: AX = error code (0000h if successful) SI,DI,DS,ES preserved Notes: Re-display all TSR windows after a HIDE WINDOWS call. SeeAlso: AH=39h/BL=00h,AX=3901h/BL=02h,AX=3901h/BL=03h --------r-2F3901BL05------------------------- INT 2F - Kingswood TSR Windows - CLOSE WINDOW AX = 3901h BL = 05h Return: AX = error code (0000h if successful) SI,DI,DS,ES preserved Notes: Close the last opened TSR window. SeeAlso: AH=39h/BL=00h,AX=3901h/BL=02h --------r-2F3901BL06------------------------- INT 2F - Kingswood TSR Windows - SET WINDOW TITLE AX = 3901h BL = 06h DS:SI -> title string Return: AX = error code (0000h if successful) SI,DI,DS,ES preserved SeeAlso: AH=39h/BL=00h,AX=3901h/BL=02h --------r-2F3901BL07------------------------- INT 2F - Kingswood TSR Windows - POSITION CURSOR AX = 3901h BL = 07h CH = Y coordinate (0-10) CL = X coordinate (0-39) Return: AX = error code (0000h if successful) SI,DI,DS,ES preserved Note: the hardware cursor is always disabled when a TSR window is opened; this call only sets a text position SeeAlso: AH=39h/BL=00h,AX=3901h/BL=08h,AX=3901h/BL=09h --------r-2F3901BL08------------------------- INT 2F - Kingswood TSR Windows - DISPLAY STRING AX = 3901h BL = 08h DS:SI -> string Return: AX = error code (0000h if successful) SI,DI,DS,ES preserved Notes: The text is not clipped. This routine understands Tab, NewLine and Carriage Return SeeAlso: AH=39h/BL=00h,AX=3901h/BL=07h --------r-2F3901BL09------------------------- INT 2F - Kingswood TSR Windows - SCROLL WINDOW AX = 3901h BL = 09h CL = scroll direction: 01h up, FFh down, 00h clear window Return: AX = error code (0000h if successful) SI,DI,DS,ES preserved SeeAlso: AH=39h/BL=00h,AX=3901h/BL=07h --------r-2F3901BL0A------------------------- INT 2F - Kingswood TSR Windows - SOUND BEEPER AX = 3901h BL = 0Ah DX = sound divisor, or 0 for silence. (divide 1843200 by required frequency to get value for DX) CL = sound length in 18.2 Hz clock ticks Return: AX = error code (0000h if successful) SI,DI,DS,ES preserved SeeAlso: AH=39h/BL=00h --------r-2F3901BL0B------------------------- INT 2F - Kingswood TSR Windows - ADD OR REMOVE USER AX = 3901h BL = 0Bh CL = number of users increment: +1 if adding a new user -1 if removing a user Return: AX = error code (0000h if successful) SI,DI,DS,ES preserved Note: the TSR windows resident module may only be removed when the internal user count is zero SeeAlso: AH=39h/BL=00h,AX=3901h/BL=02h --------V-2F3912BL03------------------------- INT 2F - Kingswood ANSI display driver - SET COMPATIBILITY MODE AX = 3912h BL = 03h CL = new mode (00h fast, FFh BIOS) Return: AL = old compatibility mode SI,DI,DS,ES preserved SeeAlso: AX=3900h,AX=3912h/BL=04h --------V-2F3912BL04------------------------- INT 2F - Kingswood ANSI display driver - SET FLAGS AX = 3912h BL = 04h CL = new flags (see #1464) Return: AL = old flags SI,DI,DS,ES preserved SeeAlso: AX=3900h,AX=3912h/BL=03h Bitfields for Kingswood ANSI flags: Bit(s) Description (Table 1464) 0 do not wrap at end of line 1 wait for beeps to end before displaying next character 2 do not use graphics cursor --------W-2F4000----------------------------- INT 2F - Windows 3.x (OS/2 2.x???) - GET VIRTUAL DEVICE DRIVER (VDD) CAPABLTIES AX = 4000h Return: AL = video virtualization (see #1465) Note: this function is used by display drivers to find out what capabilities exist for the VDD driver and also trigger the VDD driver to call functions 4005h and 4006h. This function also gives the Video Driver hardware access to the video registers. (Table 1465) Values for Windows video virtualization: 01h does not virtualize video access 02h virtualizes the video when in text mode 03h virtualizes the video when in text mode or single plane graphics modes 04h virtualizes the video when in text mode, single plane graphics modes, and VGA multiplane modes FFh virtualizes the video fully --------O-2F4001----------------------------- INT 2F C - OS/2 compatibility box - SWITCHING DOS TO BACKGROUND AX = 4001h Note: called by OS/2 when the DOS box is about to be placed in the background and the video driver should save any necessary state SeeAlso: AX=4002h,AX=4005h --------O-2F4002----------------------------- INT 2F C - OS/2 compatibility box - SWITCHING DOS TO FOREGROUND AX = 4002h Note: called by OS/2 when the DOS box is about to be placed in the foreground and the video driver should restore the previously-saved state SeeAlso: AX=4001h,AX=4006h --------W-2F4003----------------------------- INT 2F - Windows 3.x - ENTERING VIDEO DRIVER CRITICAL SECTION AX = 4003h Note: This critical section must be exited within 1 second. SeeAlso: AX=4004h --------W-2F4004----------------------------- INT 2F - Windows 3.x - EXITING VIDEO DRIVER CRITICAL SECTION AX = 4004h SeeAlso: AX=4003h --------W-2F4005----------------------------- INT 2F C - Windows 3.x - SWITCHING DOS TO BACKGROUND AX = 4005h Note: called by Windows when the DOS box is about to be placed in the background and the video driver should save any necessary state information (this may be called only in Standard mode) SeeAlso: AX=4001h,AX=4006h --------W-2F4006----------------------------- INT 2F C - Windows 3.x - SWITCHING DOS TO FOREGROUND AX = 4006h Note: called by Windows when the DOS box is about to be placed in the foreground and the video driver should restore any necessary state information (this may be called only in Standard mode) SeeAlso: AX=4002h,AX=4005h --------W-2F4007----------------------------- INT 2F - Windows 3.x - ENABLE VDD TRAPPING OF VIDEO REGISTERS AX = 4007h Note: used by Windows Standard mode --------O-2F4010----------------------------- INT 2F - OS/2 v2.0+ - INSTALLATION CHECK / GET VERSION AX = 4010h Return: AX = 4010h if OS/2 not installed AX = 0000h for OS/2 Warp 3.0 BX = OS/2 version if installed Note: OS/2 Warp 3.0 SeeAlso: INT 21/AH=30h,INT 21/AX=3306h --------E-2F4040----------------------------- INT 2F - PharLap 286|DOS-Extender Lite v2.5 - ??? AX = 4040h Return: BX:CX -> ??? --------N-2F4100----------------------------- INT 2F - DOS Enhanced LAN Manager 2.0+ MINIPOP/NETPOPUP - INSTALLATION CHECK AX = 4100h Return: CF clear if successful AL = FFh CF set on error AX = ??? Notes: MINIPOP and NETPOPUP provide a network message popup service LAN Manager enhanced mode adds features beyond the standard redirector file/printer services SeeAlso: AX=118Ah,AX=4103h,AX=4104h,AH=42h,AH=4Bh --------N-2F4103----------------------------- INT 2F - DOS Enhanced LAN Manager 2.0+ MINIPOP/NETPOPUP - ??? AX = 4103h Return: ??? SeeAlso: AX=4100h,AX=4104h --------N-2F4104----------------------------- INT 2F - DOS Enhanced LAN Manager 2.0+ MINIPOP/NETPOPUP - ??? AX = 4104h Return: ??? SeeAlso: AX=4100h,AX=4103h --------N-2F42------------------------------- INT 2F - LAN Manager 2.0 DOS Enhanced MSRV.EXE - MESSENGER SERVICE AH = 42h ??? Return: ??? Note: LAN Manager enhanced mode adds features beyond the standard redirector file/printer services SeeAlso: AX=118Ah,AX=4100h,AH=4Bh --------m-2F4300----------------------------- INT 2F - EXTENDED MEMORY SPECIFICATION (XMS) v2+ - INSTALLATION CHECK AX = 4300h Return: AL = 80h XMS driver installed AL <> 80h no driver Notes: XMS gives access to extended memory and noncontiguous/nonEMS memory above 640K this installation check DOES NOT follow the format used by other software SeeAlso: AX=4310h Index: installation check;XMS version 2+ --------m-2F4308----------------------------- INT 2F U - HIMEM.SYS v2.77+ - GET A20 HANDLER NUMBER AX = 4308h Return: AL = 43h if supported BL = A20 handler number (value of /MACHINE:nn switch) BH = AT A20 switch time (00h medium, 01h fast, 02h slow) Note: if the A20 handler number returned in BL is 00h, an external handler is being used (see AX=4330h) SeeAlso: AX=4309h,AX=4330h --------m-2F4309----------------------------- INT 2F U - HIMEM.SYS v3.09+ - GET XMS HANDLE TABLE AX = 4309h Return: AL = 43h if function supported ES:BX -> XMS handle table (see #1466) Note: HIMEM.SYS v3.09 is part of MS-DOS 6.0. SeeAlso: AX=4308h Format of XMS handle table: Offset Size Description (Table 1466) 00h BYTE ??? (01h in HIMEM.SYS v3.09) 01h BYTE size of one handle descriptor 02h WORD number of handles (default = 20h) 04h DWORD pointer to XMS handle array (see #1467) SeeAlso: #1496 Format of XMS handle descriptor [array]: Offset Size Description (Table 1467) 00h BYTE flag 01h=free, 02h=used, 04h=in pool but not associated with any EMB 01h BYTE lock count (00h=unlocked) 02h DWORD address of XMS block in KB (shift left by 10 for abs. address) 06h DWORD size of XMS block in KB --------m-2F4310----------------------------- INT 2F - EXTENDED MEMORY SPECIFICATION (XMS) v2+ - GET DRIVER ADDRESS AX = 4310h Return: ES:BX -> driver entry point (see #1468,#1469,#1472,#1479,#1488,#1493) Notes: HIMEM.SYS v2.77 chains to previous handler if AH is not 00h or 10h HIMEM.SYS requires at least 256 bytes free stack space when calling the driver entry point SeeAlso: AX=4300h,AX=4310h"Cloaking",AX=4310h"Netroom" Format of XMS driver entry point: Offset Size Description (Table 1468) 00h 5 BYTEs jump to actual handler either short jump (EBh XXh) followed by three NOPs or far jump (EAh XXXX:XXXX) to a program which has hooked itself into the XMS driver chain Note: to hook into the XMS driver chain, a program should follow the chain of far jumps until it reaches the short jump of the driver at the end of the chain; this short jump is to be replaced with a far jump to the new handler's entry point, which should contain a short jump followed by three NOPs. The new handler must return to the address pointed at by the short jump which was overwritten. Using this method, the new handler becomes the first to see every XMS request. (Table 1469) Call the XMS driver "Get XMS version number" function with: AH = 00h Return: AX = XMS version (in BCD, AH=major, AL=minor) BX = internal revision number (in BCD for HIMEM.SYS) DX = High Memory Area (HMA) state 0001h HMA (1M to 1M + 64K) exists 0000h HMA does not exist SeeAlso: #1470,#1471,#1476,#1477,#1483 (Table 1470) Call the XMS driver "Request High Memory Area" function with: AH = 01h DX = memory in bytes (for TSR or device drivers) FFFFh if application program Return: AX = status 0001h success 0000h failure BL = error code (80h,81h,90h,91h,92h) (see #1494) Note: HIMEM.SYS will fail function 01h with error code 91h if AL=40h and DX=KB free extended memory returned by last call of function 08h SeeAlso: #1471,#1503 (Table 1471) Call the XMS driver "Release High Memory Area" function with: AH = 02h Return: AX = status 0001h success 0000h failure BL = error code (80h,81h,90h,93h) (see #1494) SeeAlso: #1470 (Table 1472) Call the XMS driver "Global enable A20, for using the HMA" function with: AH = 03h Return: AX = status 0001h success 0000h failure BL = error code (80h,81h,82h) (see #1494) SeeAlso: #1473,#1474 (Table 1473) Call the XMS driver "Global disable A20" function with: AH = 04h Return: AX = status 0001h success 0000h failure BL = error code (80h,81h,82h,94h) (see #1494) SeeAlso: #1472,#1475 (Table 1474) Call the XMS driver "Local enable A20" function with: AH = 05h Return: AX = status 0001h success 0000h failure BL = error code (80h,81h,82h) (see #1494) Note: this function is used for direct access to extended memory SeeAlso: #1472,#1475 (Table 1475) Call the XMS driver "Local disable A20" function with: AH = 06h Return: AX = status 0001h success 0000h failure BL = error code (80h,81h,82h,94h) (see #1494) SeeAlso: #1473,#1474 (Table 1476) Call the XMS driver "Query A20 state" function with: AH = 07h Return: AX = status 0001h enabled 0000h disabled BL = error code (00h,80h,81h) (see #1494) SeeAlso: #1469,#1477 (Table 1477) Call the XMS driver "Query free extended memory" function with: AH = 08h BL = 00h (some implementations leave BL unchanged on success) Return: AX = size of largest extended memory block in KB DX = total extended memory in KB BL = error code (00h,80h,81h,A0h) (see #1494) Note: this function does not include the HMA in the returned memory sizes SeeAlso: #1469,#1476,#1478,#1490 (Table 1478) Call the XMS driver "Allocate extended memory block" function with: AH = 09h DX = Kbytes needed Return: AX = status 0001h success DX = handle for memory block 0000h failure BL = error code (80h,81h,A0h) (see #1494) SeeAlso: #1477,#1480,#1483,#1484,#1485,#1491 (Table 1479) Call the XMS driver "Free extended memory block" function with: AH = 0Ah DX = handle of block to free Return: AX = status 0001h success 0000h failure BL = error code (80h,81h,A2h,ABh) (see #1494) SeeAlso: #1478,#1491 (Table 1480) Call the XMS driver "Move extended memory block" function with: AH = 0Bh DS:SI -> EMM structure (see #1495) Return: AX = status 0001h success 0000h failure BL = error code (80h-82h,A3h-A9h) (see #1494) Note: if either handle in the EMM structure is 0000h, the corresponding offset is considered to be an absolute segment:offset address in directly addressable memory SeeAlso: #1478,#1481 (Table 1481) Call the XMS driver "Lock extended memory block" function with: AH = 0Ch DX = handle of block to lock Return: AX = status 0001h success DX:BX = 32-bit linear address of locked block 0000h failure BL = error code (80h,81h,A2h,ACh,ADh) (see #1494) Note: MS Windows 3.x rejects this function for handles allocated after Windows started SeeAlso: #1478,#1480,#1482 (Table 1482) Call the XMS driver "Unlock extended memory block" function with: AH = 0Dh DX = handle of block to unlock Return: AX = status 0001h success 0000h failure BL = error code (80h,81h,A2h,AAh) (see #1494) SeeAlso: #1481 (Table 1483) Call the XMS driver "Get handle information" function with: AH = 0Eh DX = handle for which to get info Return: AX = status 0001h success BH = block's lock count BL = number of free handles left DX = block size in KB 0000h failure BL = error code (80h,81h,A2h) (see #1494) BUG: MS Windows 3.10 acts as though unallocated handles are in use Note: MS Windows 3.00 has problems with this call SeeAlso: #1469,#1478,#1492 (Table 1484) Call the XMS driver "Reallocate extended memory block" function with: AH = 0Fh DX = handle of block BX = new size of block in KB Return: AX = status 0001h success 0000h failure BL = error code (80h,81h,A0h-A2h,ABh) (see #1494) SeeAlso: #1478,#1487 (Table 1485) Call the XMS driver "Request upper memory block" function with: AH = 10h DX = size of block in paragraphs Return: AX = status 0001h success BX = segment address of UMB DX = actual size of block 0000h failure BL = error code (80h,B0h,B1h) (see #1494) DX = largest available block Notes: Upper Memory consists of non-EMS memory between 640K and 1024K the XMS driver need not implement functions 10h through 12h to be considered compliant with the standard SeeAlso: #1478,#1486,#1504 (Table 1486) Call the XMS driver "Release upper memory block" function with: AH = 11h DX = segment address of UMB to release Return: AX = status 0001h success 0000h failure BL = error code (80h,B2h) (see #1494) Note: the XMS driver need not implement functions 10h through 12h to be considered compliant with the standard SeeAlso: #1479,#1485,#1487 (Table 1487) Call the XMS v3.0+ driver "Reallocate upper memory block" function with: AH = 12h DX = segment address of UMB to resize BX = new size of block in paragraphs Return: AX = status 0001h success 0000h failure BL = error code (80h,B0h,B2h) (see #1494) DX = maximum available size (RM386) Note: the XMS driver need not implement functions 10h through 12h to be considered compliant with the standard SeeAlso: #1484,#1485,#1486,#1502 (Table 1488) Call the QEMM v5.11 "???" function with: AH = 34h (QEMM 5.11 only, undocumented) ??? Return: ??? SeeAlso: #1489 (Table 1489) Call the QEMM v5.11 "???" function with: AH = 44h (QEMM 5.11 only, undocumented) ??? Return: ??? SeeAlso: #1488,#1502 (Table 1490) Call the XMS v3.0 driver "Query free extended memory" function with: AH = 88h Return: EAX = largest block of extended memory, in KB BL = status (00h,80h,81h,A0h) (see #1494) ECX = physical address of highest byte of memory (valid even on error codes 81h and A0h) EDX = total Kbytes of extended memory (0 if status A0h) BUG: HIMEM v3.03-3.07 crash on an 80286 machine if any of the 8Xh functions are called SeeAlso: #1477,#1491 (Table 1491) Call the XMS v3.0 driver "Allocate any extended memory" function with: AH = 89h EDX = Kbytes needed Return: AX = status 0001h success DX = handle for allocated block (free with AH=0Ah) (see #1479) 0000h failure BL = status (80h,81h,A0h,A1h,A2h) (see #1494) SeeAlso: #1478,#1490 (Table 1492) Call the XMS v3.0 driver "Get extended EMB handle information" function with: AH = 8Eh DX = handle Return: AX = status 0001h success BH = block's lock count CX = number of free handles left EDX = block size in KB 0000h failure BL = status (80h,81h,A2h) (see #1494) BUG: MS-DOS 6.0 HIMEM.SYS leaves CX unchanged SeeAlso: #1483,#1491,#1493 (Table 1493) Call the XMS v3.0 driver "Reallocate any extended memory block" function with: AH = 8Fh DX = unlocked memory block handle EBX = new size in KB Return: AX = status 0001h success 0000h failure BL = status (80h,81h,A0h-A2h,ABh) (see #1494) BUG: HIMEM v3.03-3.07 crash on an 80286 machine if any of the 8Xh functions are called SeeAlso: #1484,#1492 (Table 1494) Values for XMS error code returned in BL: 00h successful 80h function not implemented 81h Vdisk was detected 82h an A20 error occurred 8Eh a general driver error 8Fh unrecoverable driver error 90h HMA does not exist or is not managed by XMS provider 91h HMA is already in use 92h DX is less than the /HMAMIN= parameter 93h HMA is not allocated 94h A20 line still enabled A0h all extended memory is allocated A1h all available extended memory handles are allocated A2h invalid handle A3h source handle is invalid A4h source offset is invalid A5h destination handle is invalid A6h destination offset is invalid A7h length is invalid A8h move has an invalid overlap A9h parity error occurred AAh block is not locked ABh block is locked ACh block lock count overflowed ADh lock failed B0h only a smaller UMB is available B1h no UMB's are available B2h UMB segment number is invalid Format of EMM structure: Offset Size Description (Table 1495) 00h DWORD number of bytes to move (must be even) 04h WORD source handle 06h DWORD offset into source block 0Ah WORD destination handle 0Ch DWORD offset into destination block Notes: if source and destination overlap, only forward moves (source base less than destination base) are guaranteed to work properly if either handle is zero, the corresponding offset is interpreted as a real-mode address referring to memory directly addressable by the processor Format of XMS handle info [array]: Offset Size Description (Table 1496) 00h BYTE handle 01h BYTE lock count 02h DWORD handle size 06h DWORD handle physical address (only valid if lock count nonzero) SeeAlso: #1466 --------m-2F4310----------------------------- INT 2F - Cloaking - REAL-MODE API AX = 4310h Return: ES:BX -> driver entry point (see #1468,#1497,#1498,#1499,#1500) SeeAlso: AX=4310h"XMS" (Table 1497) Call the Cloaking v1.01 "Client Registration" function with: AH = 7Eh BX = subfunction 0000h get client registration count 0001h get client registration structures ES:DI -> buffer for registration structures Return: AX = status 0000h failed 0001h successful ---subfunction 00h--- BX = size of client structure in bytes CX = number of clients installed ---subfunction 01h--- ES:DI buffer filled SeeAlso: #1498,#1500,INT 2C/AX=0033h (Table 1498) Call the Cloaking v1.01 "Verify Cloaking Host" function with: AH = 7Fh Return: AX = status 0000h failed 0001h (successful) if installed BX = version (0101h for v1.01) CX = flags bit 0: host is VCPI-based DS:DX -> ASCIZ Cloaking host signature "CLOAKING.EXE"0, followed by a far-call entry point to uninstall host (see #1499) in Helix's CLOAKING.EXE SeeAlso: #1497,#1500 Index: installation check;Cloaking host|installation check;CLOAKING.EXE (Table 1499) Call the CLOAKING.EXE "Uninstall Host" function with: Return: AX = 4F4Bh ('OK') if successfully uninstalled protected-mode code (Table 1500) Call the Cloaking "Start Protected-Mode Client" function with: AH = 82h DX = XMS handle of locked block containing protected-mode code CL = code size (00h 16-bit, else 32-bit) ESI, EDI = parameters to pass to protected-mode code Return: AX = status nonzero success 0000h failed BL = error code (A2h,B0h) (see #1494) Notes: this function calls a user initialization function at offset 0 in the XMS memory block (see #1501) supported by Helix's RM386 v6.00 and Helix's CLOAKING.EXE SeeAlso: #1497,#1498 (Table 1501) Values user initialization function is called with: EBX = physical address of block's start ESI = user data from function 82h call EDI = user data from function 82h call CS = code selector for XMS block at EBX (16-bit or 32-bit) DS = data selector for XMS block, starting at EBX ES = selector for V86 memory access to full real-mode 1088K GS = selector for full 4G flat address space SS:ESP -> stack provided by host Return: via 32-bit FAR return Note: the initialization function may call any protected-mode Cloaking service; it should store the values of DS, ES, and GS for future reference --------m-2F4310----------------------------- INT 2F - Helix Netroom RM386 v6.00 - XMS EXTENSIONS AX = 4310h Return: ES:BX -> driver entry point (see #1502,#1503,#1504,#1505) Notes: HIMEM.SYS v2.77 chains to previous handler if AH is not 00h or 10h HIMEM.SYS requires at least 256 bytes free stack space when calling the driver entry point SeeAlso: AX=4300h,AX=4310h"XMS",AX=4310h"Cloaking" (Table 1502) Call the Netroom RM386 v6.00 "Reallocate upper memory block" function with: AH = 80h DX = segment address of UMB to resize BX = new size of block in paragraphs Return: AX = status 0001h success 0000h failure BL = error code (80h,B0h,B2h) (see #1494) DX = maximum available size Note: this function is identical to function 12h SeeAlso: #1487,#1503 (Table 1503) Call the Netroom RM386 v6.00 "re-enable HMA allocation" function with: AH = 81h Return: AX = 0001h (success) SeeAlso: #1470,#1502,#1504 (Table 1504) Call the Netroom RM386 v6.00 "Create new UMB entry" function with: AH = 83h BX = segment of high-memory block DX = first page of start of block CX = number of consecutive pages in block DI = start of UMB in block Return: AX = 0001h (success) DI = segment of first high-DOS block Note: the new UMB is not linked into the high-memory chain SeeAlso: #1485,#1503,#1505 (Table 1505) Call the Netroom RM386 v6.00 "Get all XMS handles info" function with: AH = 84h CX = size of buffer for handle info ES:DI -> buffer for handle info (see #1496) Return: AX = 0001h (success) DX = current number of allocated XMS handles SeeAlso: #1504,#1490 --------m-2F4320----------------------------- INT 2F U - HIMEM.SYS - Mach 20 SUPPORT AX = 4320h ??? Return: ??? --------m-2F4330----------------------------- INT 2F CU - HIMEM.SYS v2.77+ - GET EXTERNAL A20 HANDLER ADDRESS AX = 4330h Return: AL = 80h if external A20 handler provided ES:BX -> external A20 handler (see #1506) CL = A20 detection support 00h handler is unable to report A20 state 01h handler supports function 0002h to report A20 state Note: HIMEM.SYS calls this function to allow an external program to provide an A20 handler (i.e. to support a machine not supported by HIMEM itself) SeeAlso: AX=4308h,AX=4310h (Table 1506) Call parameters for external A20 handler are: AX = function 0000h disable A20 0001h enable A20 0002h get A20 state Return: AX = status (functions 0000h and 0001h) 0000h failure 0001h successful AX = A20 state (function 0002h) 0000h disabled 0001h enabled Note: HIMEM.SYS only calls function 0002h if the returned CL indicated that the handler supports the call --------E-2F43E0BX0000----------------------- INT 2F - DOS Protected Mode Services (DPMS) v1.0 - INSTALLATION CHECK AX = 43E0h BX = 0000h CX = 4450h ('DP') DX = 4D53h ('MS') Return: AX = 0000h if installed CF clear ES:DI -> server structure (see #1507) ES:BX -> registration structure (pre-NWDOS 7 beta spec) (see #1509) Note: the DPMS 1.0 server included with the original release of Novell DOS 7.0 supports both the beta and 1.0 specification, setting ES:BX even if CX and DX are not as specified on entry (since the beta specification did not use those registers). However, the DPMS 1.1 server included with the March 1994 update does not support the beta specification SeeAlso: AX=43E1h,AX=43E2h,AX=43E3h,INT 2F/AX=1687h Index: signature strings;DPMS Format of DPMS 1.0 server structure: Offset Size Description (Table 1507) 00h 4 BYTEs signature string "DPMS" 04h 2 BYTEs DPMS version (major,minor) 06h 8 BYTEs blank-padded server OEM name 0Eh 2 BYTEs OEM server version (major,minor) 10h WORD DPMS flags (see #1508) 12h BYTE CPU type (02h = 286, 03h = 386 or higher, higher values allowed) Bitfields for DPMS flags: Bit(s) Description (Table 1508) 0 fast processor reset available (286 only) 1 DPMS server is enabled 2 memory is remapped 3-15 reserved (undefined) Format of beta DPMS registration structure: Offset Size Description (Table 1509) 00h DWORD real-mode API entry point (see #1511) 04h DWORD 16-bit protected-mode API entry point (see #1511) 08h 8 BYTEs reserved (0) 10h 8 BYTEs blank-padded server OEM name 18h WORD flags bit 0: fast processor reset available (286 only) bits 1-15 reserved (undefined) 1Ah 2 BYTEs DPMS version (major,minor) 1Ch BYTE CPU type (02h = 286, 03h = 386 or higher) ----------2F43E1----------------------------- INT 2F - DOS Protected Mode Services (DPMS) v1.0 - REGISTER CLIENT AX = 43E1h CX = required protected-mode stack size in bytes ES:DI -> DPMS client interface structure (see #1510) Return: AX = 0000h if supported CF clear ES:DI buffer filled with API entry point code from offset 0Ah Note: the client is allowed to copy the returned API code to any location in memory, and need not keep the three code fields together SeeAlso: AX=43E0h,AX=43E2h,AX=43E3h Format of DPMS client interface structure: Offset Size Description (Table 1510) 00h WORD 0000h (structure version / flags) 02h 8 BYTEs blank-padded client name 0Ah 7 BYTEs real/virtual-86 mode API code (see #1511) 11h BYTE space for return instruction set to C3h for near return, CBh for far return 12h 7 BYTEs 16-bit protected-mode API code (see #1511) 19h BYTE space for return instruction set to C3h for near return, CBh for far return 1Ah 9 BYTEs 32-bit protected-mode API code (see #1511) 23h BYTE space for return instruction set to C3h for near return, CBh for far return Note: the DPMS server fills the return opcode bytes with zeros and DPMS requests will thus crash the system unless the application explicitly sets them (some early versions set them to C3h by default, but one should not rely on that) (Table 1511) Call DPMS entry point with: AX = 0000h unregister client from server ---control transfer functions--- AX = 0100h call protected-mode procedure CX = number of words of stack to copy ES:(E)DI -> callup/down register structure (see #1513) Return: CF clear if successful CF set on error AX = error code (see #1512) AX = 0101h call real-mode procedure (RETF return) CX = number of words of stack to copy ES:(E)DI -> callup/down register structure (see #1513) Return: CF clear if successful CF set on error AX = error code (see #1512) AX = 0102h call real-mode procedure (IRET return) CX = number of words of stack to copy ES:(E)DI -> callup/down register structure (see #1513) Return: CF clear if successful CF set on error AX = error code (see #1512) AX = 0103h call real-mode interrupt handler BL = interrupt number CX = number of words of stack to copy ES:(E)DI -> callup/down register structure (see #1513) Return: CF clear if successful CF set on error AX = error code (see #1512) AX = 0104h register default protected mode procedure ES:(E)DI -> default register structure (see #1514) Return: CF clear if successful CF set on error AX = error code (see #1512) AX = 0105h register default real-mode procedure (RETF return) ES:(E)DI -> default register structure (see #1514) Return: CF clear if successful CF set on error AX = error code (see #1512) Note: the procedure will be called from 16-bit prot. mode AX = 0106h register default real-mode procedure (IRET return) ES:(E)DI -> default register structure (see #1514) Return: CF clear if successful CF set on error AX = error code (see #1512) Note: the procedure will be called from 16-bit prot. mode AX = 0107h register default real-mode interrupt handler BL = interrupt number ES:(E)DI -> default register structure (see #1514) Return: CF clear if successful CF set on error AX = error code (see #1512) Note: the handler will be called from 16-bit protected mode AX = 0108h register default real-mode procedure (RETF return) ES:(E)DI -> default register structure (see #1514) Return: CF clear if successful CF set on error AX = error code (see #1512) Note: the procedure will be called from 32-bit prot. mode AX = 0109h register default real-mode procedure (IRET return) ES:(E)DI -> default register structure (see #1514) Return: CF clear if successful CF set on error AX = error code (see #1512) Note: the procedure will be called from 32-bit prot. mode AX = 010Ah register default real-mode interrupt handler BL = interrupt number ES:(E)DI -> default register structure (see #1514) Return: CF clear if successful CF set on error AX = error code (see #1512) Note: the handler will be called from 32-bit protected mode ---descriptor management--- AX = 0200h allocate descriptors CX = number of descriptors to allocate Return: CF clear if successful AX = selector for first descriptor allocated CF set on error AX = error code (see #1512) AX = 0201h free a descriptor BX = selector for descriptor Return: CF clear if successful CF set on error AX = error code (see #1512) AX = 0202h create alias descriptor BX = selector for descriptor to be aliased Return: CF clear if successful AX = alias descriptor CF set on error AX = error code (see #1512) AX = 0203h build alias to real-mode segment BX = descriptor CX = real-mode segment Return: CF clear if successful CF set on error AX = error code (see #1512) AX = 0204h set descriptor base BX = descriptor CX:DX = base address Return: CF clear if successful CF set on error AX = error code (see #1512) AX = 0205h set descriptor limit BX = descriptor CX = limit Return: CF clear if successful CF set on error AX = error code (see #1512) AX = 0206h set descriptor type/attribute BX = descriptor CL = type CH = attribute Return: CF clear if successful CF set on error AX = error code (see #1512) AX = 0207h get descriptor base BX = descriptor Return: CF clear if successful CX:DX = base address CF set on error AX = error code (see #1512) ---linear memory functions--- AX = 0300h get size of largest free block of memory Return: CF clear if successful BX:CX = size CF set on error AX = error code (see #1512) AX = 0301h allocate block of extended memory BX:CX = required size Return: CF clear if successful BX:CX = base address SI:DI = handle CF set on error AX = error code (see #1512) AX = 0302h free block of extended memory SI:DI = handle Return: CF clear if successful CF set on error AX = error code (see #1512) AX = 0303h map linear memory ES:(E)DI -> DDS (see #1515) Return: CF clear if successful BX:CX = base address SI:DI = handle CF set on error AX = error code (see #1512) AX = 0304h unmap linear memory SI:DI = handle Return: CF clear if successful CF set on error AX = error code (see #1512) AX = 0305h get page table entries ESI = linear address (E)CX = count ES:(E)DI -> buffer for page table entries Return: CF clear if successful ES:(E)DI buffer filled CF set on error AX = error code (see #1512) AX = 0306h set page table entries EBX = linear memory handle ESI = linear address (E)CX = count ES:(E)DI -> buffer containing page table entries Return: CF clear if successful CF set on error AX = error code (see #1512) AX = 0307h get largest mappable block size Return: CF clear if successful BX:CX = size CF set on error AX = error code (see #1512) ---miscellaneous--- AX = 0400h relocate segment to extended memory ES:SI = base address CX = limit BL = type BH = attribute DX = selector or 0000h Return: CF clear if successful AX = selector BX:CX = new base address SI:DI = handle CF set on error AX = error code (see #1512) Note: the beta DPMS specification, which is still supported by the Novell DOS 7.0 DPMS host, only supported functions 0100h-0103h, 0200h-0207h, 0300h-0304h, and 0400h (Table 1512) Values for DPMS error code: 8000h general error 8001h unsupported function 8002h unable to switch to protected mode 8004h no default stack defined 8005h unknown client 8010h resource unavailable 8011h descriptor unavailable 8012h linear memory unavailable 8013h physical memory unavailable 8021h invalid value 8022h invalid selector 8023h invalid handle 8025h invalid linear address Format of DPMS callup/down register structure: Offset Size Description (Table 1513) 00h DWORD EDI 04h DWORD ESI 08h DWORD EBP 0Ch 4 BYTEs reserved (0) (ESP, may be used by DPMS server) 10h DWORD EBX 14h DWORD EDX 18h DWORD ECX 20h DWORD EAX 24h DWORD EIP 28h WORD CS 2Ah 2 BYTEs reserved (0) 2Ch DWORD EFLAGS 30h DWORD ESP 34h WORD SS 36h 2 BYTEs reserved (0) 38h WORD ES 3Ah 2 BYTEs reserved (0) 3Ch WORD DS 3Eh 2 BYTEs reserved (0) 40h WORD FS 42h 2 BYTEs reserved (0) 44h WORD GS 46h 2 BYTEs reserved (0) Format of DPMS default register structure: Offset Size Description (Table 1514) 00h DWORD EIP 04h WORD CS 06h 2 BYTEs reserved (0) 08h WORD number of words to copy from stack to stack 0Ah BYTE (call) 00h (ret) nonzero if call could not be made 0Bh BYTE reserved (may be used by some servers) 0Ch DWORD ESP 10h WORD SS 12h 2 BYTEs reserved (0) 14h WORD ES 16h 2 BYTEs reserved (0) 18h WORD DS 1Ah 2 BYTEs reserved (0) 1Ch WORD FS 1Eh 2 BYTEs reserved (0) 20h WORD GS 22h 2 BYTEs reserved (0) 24h 9 BYTEs API entry code (filled in by server) Format of DPMS lock DDS: Offset Size Description (Table 1515) 00h DWORD total size in bytes 04h DWORD offset 08h WORD segment or selector 0Ah WORD reserved 0Ch WORD maximum number of physical blocks structure has space for 0Eh WORD number of physical blocks listed 10h DWORD physical address of first block 14h DWORD size in bytes of first block ... ----------2F43E2----------------------------- INT 2F - DOS Protected Mode Services (DPMS) v1.0 - ENABLE/DISABLE DPMS AX = 43E2h BX = new state (0000h disable, 0001h enable) Return: AX = 0000h if supported Note: this function should normally be called only by system software SeeAlso: AX=43E0h,AX=43E1h,AX=43E3h ----------2F43E3BX0000----------------------- INT 2F - DOS Protected Mode Services (DPMS) v1.0 - DPMS STARTUP BROADCAST AX = 43E3h BX = 0000h CX = 4450h ('DP') DX = 4D53h ('MS') SeeAlso: AX=43E0h,AX=43E4h ----------2F43E4BX0000----------------------- INT 2F - DOS Protected Mode Services (DPMS) v1.0 - DPMS EXIT BROADCAST AX = 43E4h BX = 0000h CX = 4450h ('DP') DX = 4D53h ('MS') SeeAlso: AX=43E0h,AX=43E3h --------E-2F44------------------------------- INT 2F U - DOS Extender support??? AH = 44h AL = function (at least 0Bh, 15h, 17h) ??? Return: ??? Note: called by Codeview for Windows SeeAlso: AH=86h --------G-2F4500----------------------------- INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - INSTALLATION CHECK AX = 4500h Return: AL = installation status 01h if PROF.COM installed 02h if VPROD.386 installed SeeAlso: AX=4501h,AX=4502h --------G-2F4501----------------------------- INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - SETUP PROFILER AX = 4501h BX = CSIPS buffer size in KB (first parameter for ProfSetup) CX = output limit in KB (second parameter for ProfSetup) Note: this call is not supported by PROF.COM SeeAlso: AX=4502h,AX=4503h --------G-2F4502----------------------------- INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - SET SAMPLING RATE AX = 4502h BL = sampling rate for PROF.COM (0 < BL <= 13) (01h = 8192/s, 04h = 1024/s, 08h = 32/s, 0Dh = 1/s) CX = sampling rate for VPROD.386 Note: for PROF.COM, this programs the CMOS clock by setting BL+2 as the low four bits of CMOS register 0Ah. The interruption rate is 1 SHL (15 - BL) per second. SeeAlso: AX=4501h,AX=4503h --------G-2F4503----------------------------- INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - START PROFILING AX = 4503h Notes: Profiling is also turned on by the key combinations LeftShift + RightShift + Alt and LeftShift + RightShift + Ctrl for PROF.COM, this call programs the CMOS clock by reading register 0Ch, and setting bit 6 of register 0Bh. It then makes sure that IRQ8 is unmasked SeeAlso: AX=4504h --------G-2F4504----------------------------- INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - STOP PROFILING AX = 4504h Notes: profiling is also turned off by the key combination LeftShift + RightShift for PROF.COM, this programs the CMOS clock by reading register 0Ch and clearing bit 6 of register 0Bh. It then masks IRQ8. SeeAlso: AX=4503h,AX=4505h,AX=4506h,AX=4507h --------G-2F4505----------------------------- INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - CLEAR PROFILING DATA AX = 4505h SeeAlso: AX=4503h,AX=4504h,AX=4506h --------G-2F4506----------------------------- INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - "ProfFlush" AX = 4506h SeeAlso: AX=4505h,AX=4507h --------G-2F4507----------------------------- INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - "ProfFinish" AX = 4507h Note: this call is essentially a "ProfStop" (AX=4504h) followed by "ProfFlush" (AX=4506h) SeeAlso: AX=4504h,AX=4505h,AX=4506h --------G-2F4508----------------------------- INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - ALTERNATE SEGDEBUG IFACE AX = 4508h BX = ordinal (or 0000h) CX = segment DX = instance (or 0000h) SI = type (or 0000h) ES:DI -> ASCIZ module name Notes: this call is an alternate entry to the profiler's SEGDEBUG interface, but only to function 0, for notifying the profiler of each new segment loaded. The SHOWHITS utility then examines the profiler's output files (CSIPS.DAT and SEGENTRY.DAT) in conjunction with symbol files to provide information in a useful form. this call does not have a corresponding Windows function SeeAlso: AX=4500h --------D-2F4601----------------------------- INT 2F CU - MS Windows WINOLDAP - SWITCHING ??? AX = 4601h Return: ??? Note: the DOS 5+ kernel intercepts this function and copies the MCB following the caller's PSP memory block into the DOS data segment; in conjunction with AX=4602h, this intercept is used by DOS to avoid corruption of the Windows real-mode heap's end sentinel SeeAlso: AX=1700h,AX=4602h --------D-2F4602----------------------------- INT 2F CU - MS Windows WINOLDAP - SWITCHING ??? AX = 4602h Return: ??? Note: the DOS 5+ kernel intercepts this function and copies the previously-saved MCB from the DOS data segment into the MCB following the caller's PSP memory block; in conjunction with AX=4601h, this intercept is used by DOS to avoid corruption of the Windows real-mode heap's end sentinel SeeAlso: AX=1700h,AX=4601h --------E-2F46------------------------------- INT 2F U - Windows/286 DOS Extender AH = 46h AL = subfunction (03h,04h) Return: ??? Note: these two subfunctions are called by MS Windows 3.0 --------v-2F4653CX0002----------------------- INT 2F - F-PROT v1.x only - F-LOCK.EXE - API AX = 4653h CX = 0002h BX = subfunction 0000h installation check Return: AX = FFFFh 0001h uninstall Return: AX,BX,ES destroyed 0002h disable (v1.08 and below only) 0003h enable (v1.08 and below only) Program: F-LOCK is part of the shareware F-PROT virus/trojan protection package by Fridrik Skulason SeeAlso: AX=4653h/CX=0003h,AX=CA00h,INT 21/AX=4BEEh Index: installation check;F-LOCK|uninstall;F-LOCK --------v-2F4653CX0003----------------------- INT 2F - F-PROT v1.x only - F-XCHK.EXE - API AX = 4653h CX = 0003h BX = subfunction 0000h installation check Return: AX = FFFFh 0001h uninstall Return: AX,BX,ES destroyed Program: F-XCHK is part of the shareware F-PROT virus/trojan protection package by Fridrik Skulason SeeAlso: AX=4653h/CX=0002h,AX=4653h/CX=0004h,AX=CA00h Index: installation check;F-XCHK|uninstall;F-XCHK --------v-2F4653CX0004----------------------- INT 2F - F-PROT v1.x only - F-POPUP.EXE - API AX = 4653h CX = 0004h BX = subfunction 0000h installation check Return: AX = FFFFh 0001h uninstall Return: AX,BX,ES destroyed 0002h disable (v1.08 and below only) display message (v1.14+) other registers: ??? 0003h enable (v1.08 and below only) display message (v1.14+) other registers: ??? Return: AX = key pressed by user Program: F-POPUP is part of the shareware F-PROT virus/trojan protection package by Fridrik Skulason SeeAlso: AX=4653h/CX=0003h,AX=4653h/CX=0005h,AX=CA00h Index: installation check;F-POPUP|uninstall;F-POPUP --------v-2F4653CX0005----------------------- INT 2F - F-PROT v1.x only - F-DLOCK.EXE - API AX = 4653h CX = 0005h BX = subfunction 0000h installation check Return: AX = FFFFh 0001h uninstall Return: AX,BX,ES destroyed Program: F-DLOCK is part of the shareware F-PROT virus/trojan protection package by Fridrik Skulason SeeAlso: AX=4653h/CX=0004h,AX=CA00h Index: installation check;F-DLOCK|uninstall;F-DLOCK --------W-2F4680----------------------------- INT 2F U - MS Windows v3.0 - INSTALLATION CHECK AX = 4680h Return: AX = result 0000h MS Windows 3.0 running in real (/R) or standard (/S) mode, or DOS 5 DOSSHELL active nonzero no Windows, Windows prior to 3.0, or Windows3 in enhanced mode Note: Windows 3.1 finally provides an installation check which works in all modes (see AX=160Ah) SeeAlso: AX=1600h,AX=160Ah ----------2F47------------------------------- INT 2F U - ??? AH = 47h ??? Return: ??? Note: reportedly called by Microsoft BASIC Compiler v7.0 --------K-2F4800----------------------------- INT 2F - DOS 5+ DOSKEY - INSTALLATION CHECK AX = 4800h Return: AL = nonzero if installed (DOS 5.0 and 6.0 return AX=AA02h) ES = segment of DOSKEY resident portion Note: DOSKEY chains if AL is not 00h or 10h on entry SeeAlso: AX=4800h"PCED",AX=4810h --------K-2F4800----------------------------- INT 2F - PCED v2.1 - INSTALLATION CHECK AX = 4800h Return: AX = AACDh if installed ES = segment of PCED kernel (PCED has multiple code segments) Program: PCED v2.1 is a command line editor/history/macro facility by Cove Software. It is the commercial version of the freeware CED. Notes: DOSKEY also responds to this call if installed, returning AX=AA02h. unlike DOSKEY, PCED does *not* chain if AL contains an unsupported function code. It IRETs with all registers intact. --------K-2F4810----------------------------- INT 2F - DOS 5+ DOSKEY, PCED v2.1 - READ INPUT LINE FROM CONSOLE AX = 4810h DS:DX -> line buffer (see #0573 at INT 21/AH=0Ah) Return: AX = 0000h if successful Notes: the first byte (length) of the buffer MUST be 80h, or DOSKEY chains to the previous handler; PCED allows sizes other than 80h if the user's input is a macro name, no text is placed in the buffer even though AX=0000h on return; the program must immediately issue this call again to retrieve the expansion of the macro. Similarly, if the user enters a special parameter such as $*, this call must be repeated to retrieve the expansion; on the second call, DOSKEY overwrites the macro name on the screen with its expansion. unlike DOSKEY, PCED expands all macros on the first call, so it is not necessary to make two calls; since the buffer is not empty on return, DOSKEY-aware programs will not make the second call DOSKEY chains if AL is not 00h or 10h on entry SeeAlso: AX=4800h,INT 21/AH=0Ah --------K-2F48C0----------------------------- INT 2F - PCED v2.1 - PCED API AX = 48C0h DX = API function code other registers as required by the specified function Return: CF clear if successful CF set on error AX = PCED error code other registers as appropriate for API function Program: PCED v2.1 is a command line editor/history/macro facility by Cove Software. It is the commercial version of the freeware CED. Note: the full API information is available from Cove Software SeeAlso: AX=4800h"PCED",AX=48C1h,AX=48C2h,AX=48C3h ----------2F48C1BL00------------------------- INT 2F - PCED/VSTACK - INSTALLATION CHECK AX = 48C1h BL = 00h Return: AX = 0000h if installed BX = VSTACK resident segment Program: VSTACK is a resident backscroll utility included as part of the PCED package by Cove Software Note: chains if BL <> 00h on entry SeeAlso: AX=48C0h,AX=48C2h ----------2F48C2BL00------------------------- INT 2F - PCED/ATTRIB - INSTALLATION CHECK AX = 48C2h BL = 00h Return: AX = 0000h if installed BX = ATTRIB resident segment Program: ATTRIB is a resident file attribute changer included as part of the PCED package by Cove Software Note: chains if BL <> 00h on entry SeeAlso: AX=48C0h,AX=48C1h,AX=48C3h --------K-2F48C3BL00------------------------- INT 2F - PCED/KEYDEF - INSTALLATION CHECK AX = 48C3h BL = 00h Return: AX = 0000h if installed BX = KEYDEF resident segment Program: KEYDEF is a resident keyboard redefinition utility included as part of the PCED package by Cove Software Note: chains if BL <> 00h on entry SeeAlso: AX=48C0h,AX=48C2h,AX=48C4h ----------2F48C4BL00------------------------- INT 2F - PCED/FLIST - INSTALLATION CHECK AX = 48C4h BL = 00h Return: AX = 0000h if installed BX = FLIST resident segment Program: FLIST is a resident filelist processor included as part of the PCED package by Cove Software Note: chains if BL <> 00h on entry SeeAlso: AX=48C0h,AX=48C3h,AX=48C5h ----------2F48C5BL00------------------------- INT 2F - PCED/ASSOC - INSTALLATION CHECK AX = 48C5h BL = 00h Return: AX = 0000h if installed BX = ASSOC resident segment Program: ASSOC is a resident utility included as part of the PCED package which associated files with executable programs based on their extensions Note: chains if BL > 02h on entry SeeAlso: AX=48C0h,AX=48C4h,AX=48C5h/BL=01h,AX=48C5h/BL=02h ----------2F48C5BL01------------------------- INT 2F - PCED/ASSOC - VERSION CHECK AX = 48C5h BL = 01h Return: AX = 0000h if installed BX = binary ASSOC version (BL = major, BH = minor) Note: chains if BL > 02h on entry SeeAlso: AX=48C0h,AX=48C5h/BL=00h,AX=48C5h/BL=02h ----------2F48C5BL02------------------------- INT 2F - PCED/ASSOC - ASSOCIATION TEST AX = 48C5h BL = 02h DS:SI -> ASCIZ filename Return: AX = status 0000h if filename is unknown 0001h if there is an association defined for the file BX destroyed Program: ASSOC is a resident utility included as part of the PCED package which associated files with executable programs based on their extensions Note: chains if BL > 02h on entry SeeAlso: AX=48C0h,AX=48C5h/BL=00h,AX=48C5h/BL=01h ----------2F49------------------------------- INT 2F U - ??? AH = 49h ??? Return: ??? Note: reportedly called by DOS 5.0 installation --------D-2F4A00CX0000----------------------- INT 2F CU - DOS 5+ - FLOPPY-DISK LOGICAL DRIVE CHANGE NOTIFICATION AX = 4A00h CX = 0000h DH = new drive number DL = current drive number Return: CX = FFFFh to skip "Insert diskette for drive X:" message Note: called by MS-DOS 5.0+ IO.SYS just before displaying the message "Insert diskette for drive X:" on single-floppy systems --------D-2F4A01----------------------------- INT 2F - DOS 5+ - QUERY FREE HMA SPACE AX = 4A01h Return: BX = number of bytes available in HMA (0000h if DOS not using HMA) ES:DI -> start of available HMA area (FFFFh:FFFFh if not using HMA) Note: called by Windows 3.1 DOSX.EXE SeeAlso: AX=4310h,AX=4A02h --------D-2F4A02----------------------------- INT 2F - DOS 5+ - ALLOCATE HMA SPACE AX = 4A02h BX = number of bytes Return: ES:DI -> start of allocated HMA block or FFFFh:FFFFh BX = number of bytes actually allocated (rounded up to next paragraph for DOS 5.0 and 6.0) Notes: this call is not valid unless DOS is loaded in the HMA (DOS=HIGH) called by Windows 3.1 DOSX.EXE SeeAlso: AX=4A01h --------T-2F4A05----------------------------- INT 2F U - DOS 5+ DOSSHELL - TASK SWITCHING API??? AX = 4A05h SI = function 0000h reset??? 0001h ??? ES:BP -> 80-byte buffer containing ??? 0002h ??? 0003h ??? 0004h ??? BL = ??? 0005h ??? 0006h get ??? Return: ES:SI -> ??? 0007h get ??? Return: AX = ??? 0008h get ??? Return: DX:AX -> ??? (internal control data of some kind) 0009h get ??? Return: ES:SI -> ??? (apparently identical to function 0006h) 000Ah ??? BL = length of buffer ES:BP -> buffer containing ??? 000Bh get ??? Return: AX = ??? 000Ch ??? BL = ??? Return: if BL nonzero on entry DX:AX -> ??? if BL = 00h on entry ES:SI -> ??? Notes: DOSSHELL chains to the previous handler if SI is not one of the values listed above the DOSSWAP.EXE module calls functions 03h,04h,05h,07h,08h,09h,0Ch the Windows 3.1 DSWAP.EXE and WSWAP.EXE task switchers use these calls SeeAlso: AX=4B01h --------D-2F4A06----------------------------- INT 2F CU - DOS 5+ - DOS SUPERVISOR "REBOOT PANEL" - ADJUST MEMORY SIZE AX = 4A06h DX = segment following last byte of conventional memory Return: DX = segment following last byte of memory available for use by DOS Desc: used to override the default memory size when booting diskless workstations Notes: called by MS-DOS 5+ IO.SYS startup code if the signature "RPL" is present three bytes beyond the INT 2F handler; this call overrides the value returned by INT 12 hooked by RPL code at the top of memory to protect itself from being overwritten; DOS builds a memory block with owner = 0008h and name "RPL" which must be freed by the RPL code when it is done SeeAlso: INT 12,INT 18 --------N-2F4A07----------------------------- INT 2F U - RESERVED FOR PROTMAN SUPPORT AX = 4A07h ??? Return: ??? --------c-2F4A10BX0000----------------------- INT 2F - SMARTDRV v4.00+ - INSTALLATION CHECK AND HIT RATIOS AX = 4A10h BX = 0000h CX = EBABh (v4.1+; see Note) Return: AX = BABEh if installed DX:BX = cache hits DI:SI = cache misses CX = number of dirty cache elements BP = version in BCD (4.10 = 0410h) Notes: most of the SMARTDRV API, including this call, is supported by PC-Cache v8.0 and recent versions of the Norton Caches if DBLSPACE.BIN is installed but SMARTDRV has not yet been installed, then calls of this function with CX<>EBABh on entry cause DBLSPACE.BIN to display the error message "Cannot run SMARTDrive 4.0 with DoubleSpace" and abort the caller with INT 21/AX=4C00h SMARTDRV v3.x had a completely different API using IOCTL calls, which was also supported by the Norton Caches SeeAlso: AX=4A10h/BX=0001h,AX=4A10h/BX=0004h,AX=4A10h/BX=0005h SeeAlso: AX=4A10h/BX=0007h,AX=4A10h/BX=1234h,AX=4A11h/BX=0000h SeeAlso: INT 21/AX=4402h"SMARTDRV",INT 21/AX=4403h"SMARTDRV" ----------2F4A10BX0000----------------------- INT 2F U - Novell NWCACHE - ??? AX = 4A10h BX = 0000h CX = 0EDCh Return: ??? SeeAlso: AX=4A10h/BX=0001h"NWCACHE" --------c-2F4A10BX0001----------------------- INT 2F - SMARTDRV v4.00+ - FLUSH BUFFERS (COMMIT CACHE) AX = 4A10h BX = 0001h Note: this function is also supported by PC-Cache v8.0. SeeAlso: AX=4A10h/BX=0000h,AX=4A10h/BX=0002h ----------2F4A10BX0001----------------------- INT 2F U - Novell NWCACHE - ??? AX = 4A10h BX = 0001h CX = 0EDCh Return: ??? SeeAlso: AX=4A10h/BX=0000h"NWCACHE" --------c-2F4A10BX0002----------------------- INT 2F - SMARTDRV v4.00+ - RESET CACHE AX = 4A10h BX = 0002h Note: this function is also supported by PC-Cache v8.0. SeeAlso: AX=4A10h/BX=0000h,AX=4A10h/BX=0001h --------c-2F4A10BX0003----------------------- INT 2F - SMARTDRV v4.00+ - STATUS AX = 4A10h BX = 0003h BP = drive number (0=A, 1=B, etc.) DL = subfunction 00h only get information 01h turn on read cache 02h turn off read cache 03h turn on write cache 04h turn off write cache Return: AX = BABEh if OK DL = status (see #1516) DL = FFh if drive does not exist Notes: If the read cache is off, reads will not be cached, but writes will continue to be cached if the write-cache is enabled. this function is also supported by PC-Cache v8.0. SeeAlso: AX=4A10h/BX=0000h Bitfields for SMARTDRV status: Bit(s) Description (Table 1516) 7 not cached 6 write-through (not write-cached) 0-5 real drive number (0=A, 1=B...) --------c-2F4A10BX0004----------------------- INT 2F - SMARTDRV v4.00+ - GET CACHE SIZE AX = 4A10h BX = 0004h Return: AX = size in elements of full-sized cache BX = current size in elements CX = size of one element in bytes DX = number of elements under Windows Note: this function is also supported by PC-Cache v8.0. SeeAlso: AX=4A10h/BX=0000h,AX=4A10h/BX=0003h,AX=4A10h/BX=0005h --------c-2F4A10BX0005----------------------- INT 2F - SMARTDRV v4.00+ - GET DOUBLE-BUFFER STATUS AX = 4A10h BX = 0005h BP = drive number (0=A, 1=B...) Return: AX = BABEh if double-buffered ES:DI -> 16-byte array of status bytes for fixed disks (see #1517) SeeAlso: AX=4A10h/BX=0000h,AX=4A10h/BX=0003h,AX=4A10h/BX=0006h (Table 1517) Values for SMARTDRV status byte: 00h state unknown FFh drive double-buffered else not double-buffered --------c-2F4A10BX0006----------------------- INT 2F CU - SMARTDRV v4.00+ - CHECK IF DRIVE CACHEABLE AX = 4A10h BX = 0006h CL = drive number (01h = A:) Return: AX = 0006h if drive should not be cached by SMARTDRV Note: called by SMARTDRV at startup to determine whether it should cache a particular drive SeeAlso: AX=4A10h/BX=0000h --------c-2F4A10BX0007----------------------- INT 2F - SMARTDRV v4.00+ - GET DEVICE DRIVER FOR DRIVE AX = 4A10h BX = 0007h BP = drive number (00h=A:) Return: DL = unit number within device driver ES:DI -> device driver header for drive Note: this function is also supported by PC-Cache v8.0. this call is reported to always return the driver header of the standard block driver (A:-C:+) for SmartDrive v5.00 from MS-DOS 6.2 SeeAlso: AX=4A10h/BX=0000h,AX=4A11h/BX=0003h,AX=4A11h/BX=0004h --------c-2F4A10BX0008----------------------- INT 2F - SMARTDRV v4.20+ - GET/SET FLUSH BEFORE PROMPT, CD-ROM SUPPORT AX = 4A10h BX = 0008h DL = subfunction 00h set DH = new states bit 0: flush before prompt bits 1-7 reserved (0) 01h get Return: DH = status flags bit 0: (v4.2+) flush before prompt bit 1: (v5.0+) CD-ROM caching support installed Note: v4.2 was an interim release to fix problems in the SMARTDRV included with MS-DOS 6.00; v5.00 is included with MS-DOS 6.2 --------c-2F4A10BX000A----------------------- INT 2F - SMARTDRV v4.00+ - GET ELEMENT STATUS TABLE AX = 4A10h BX = 000Ah Return: ES:BX -> information pointer table (see #1518) Note: this function is also supported by PC-Cache v8.0. SeeAlso: AX=4A10h/BX=0000h Format of SMARTDRV information pointer table: Offset Size Description (Table 1518) 00h WORD offset of ??? byte/word array (byte if elements < 2000h bytes) 02h WORD offset of dirty flag byte/word array (byte if elts < 2000h) each byte/word is a bit string of the dirty sectors in element 04h WORD offset of word array containing low halves of unique identifiers for the corresponding element's contents 06h WORD offset of word array containing high halves of unique identifiers for the corresponding element's contents 08h WORD offset of WORD containing current number of elements in cache --------c-2F4A10BX1234----------------------- INT 2F - SMARTDRV v4.00+ - SIGNAL SERIOUS ERROR AX = 4A10h BX = 1234h Desc: this function pops up a message box saying that a serious error occurred and to hit R to retry, then waits for the keypress Note: this function is also supported by PC-Cache v8.0. SeeAlso: AX=4A10h/BX=0000h --------k-2F4A11BX0000----------------------- INT 2F - DBLSPACE.BIN - "GetVersion" - INSTALLATION CHECK AX = 4A11h BX = 0000h Return: AX = 0000h (successful) BX = 444Dh ("DM") CL = first drive letter used by DBLSPACE (41h ['A'] = A:) CH = number of drive letters used by DBLSPACE DX = internal DBLSPACE.BIN version number (bits 14-0) bit 15 set if DBLSPACE.BIN has not yet been relocated to final position in memory (i.e. DBLSPACE.SYS /MOVE) Program: DBLSPACE.BIN is the resident driver for DoubleSpace, the disk-compression software bundled with MS-DOS 6.0 and 6.20 Notes: this function is also supported by the version of SuperStor bundled with IBM DOS 6.x and "preloading" versions of Stacker the complete DBLSPACE.BIN API is still supported by MS-DOS 6.22's DRVSPACE.BIN SeeAlso: AX=4A11h/BX=0001h,AX=4A11h/BX=0002h,AX=4A11h/BX=0003h SeeAlso: AX=4A11h/BX=0005h,AX=4A11h/BX=0007h,AX=4A11h/BX=FFFFh SeeAlso: INT 21/AX=4404h"DBLSPACE" --------k-2F4A11BX0001----------------------- INT 2F - DBLSPACE.BIN - "GetDriveMapping" - GET DRIVE MAPPING AX = 4A11h BX = 0001h DL = drive number (0=A:) Return: AX = status (see also #1519) 0000h successful if DL was compressed drive, BL = host drive (bit 7 set if drive is compressed) else if DL was host drive, BL = compressed drive else BL = specified drive (if available for DoubleSpace) BH = DoubleSpace sequence number other error code (0101h) (see #1519) apparently never returned for the MS-DOS 6.2 DoubleSpace Note: the compressed volume file for the specified compressed drive is host:\DBLSPACE.sequence SeeAlso: AX=4A11h/BX=0000h (Table 1519) Values for DBLSPACE function status: 0000h successful 0100h bad function 0101h invalid drive 0102h not a compressed drive 0103h drive already swapped 0104h drive not swapped --------k-2F4A11BX0002----------------------- INT 2F - DBLSPACE.BIN - "Swap Drive" - SWAP DRIVE LETTERS OF CVF AND HOST DRIVE AX = 4A11h BX = 0002h DL = drive number (0=A:) of compressed drive to swap with its host Return: AX = status (0000h,0101h,0102h,0103h) (see #1519) Note: this function is intended for use by DBLSPACE.EXE only SeeAlso: AX=4A11h/BX=0000h --------k-2F4A11BX0003----------------------- INT 2F - DBLSPACE.BIN - "DSGetEntryPoints" - GET DEVICE DRIVER ENTRY POINTS AX = 4A11h BX = 0003h CL = drive number (0=A:) of compressed drive Return: CL = FFh on error (not compressed drive) CL <> FFh driver unit number of host drive ES:SI -> device driver's strategy routine ES:DI -> device driver's interrupt routine BX destroyed Note: in conjunction with subfunction 0004h, this call allows disk caches like SMARTDRV to apply a device driver wrapper to DoubleSpaced drives just like SMARTDRV applies to regular block devices SeeAlso: AX=4A10h/BX=0007h,AX=4A11h/BX=0000h,AX=4A11h/BX=0004h --------k-2F4A11BX0004----------------------- INT 2F - DBLSPACE.BIN - "DSSetEntryPoints" - SET DEVICE DRIVER ENTRY POINTS AX = 4A11h BX = 0004h CL = drive number (0=A:) of compressed drive DL = unit number for new driver entry points DH = 00h ES:SI -> device driver strategy routine to call for drive ES:DI -> device driver interrupt routine to call for drive Return: CL = FFh on error (not a compressed drive) BX destroyed Program: DBLSPACE.BIN is the resident driver for DoubleSpace, the disk-compression software bundled with MS-DOS 6.0 Note: in conjunction with subfunction 0003h, this call allows disk caches like SMARTDRV to apply a device driver wrapper to DoubleSpaced drives just like SMARTDRV applies to regular block devices SeeAlso: AX=4A10h/BX=0007h,AX=4A11h/BX=0000h,AX=4A11h/BX=0003h --------k-2F4A11BX0005----------------------- INT 2F - DBLSPACE.BIN - "ActivateDrive" - MOUNT COMPRESSED DRIVE AX = 4A11h BX = 0005h DL = drive number (0=A:) to assign to new drive ES:SI -> activation record (see #1520) Return: status returned in activation record (see #1521) SeeAlso: AX=4A11h/BX=0000h,AX=4A11h/BX=0006h Format of DBLSPACE activation record: Offset Size Description (Table 1520) 00h 2 BYTEs signature "MD" (4Dh 44h) 02h BYTE 4Dh ('M') mount command 03h BYTE error code (set to FFh before calling) (see #1521) 04h BYTE host drive number (0=A:) 05h ??? DISK_UNIT structure (not documented) (Table 1521) Values for DBLSPACE Mount error code: 00h successful 01h drive letter not available for DoubleSpace 02h drive letter already in use 03h no more disk units (increase MaxRemovableDrives in .INI) 09h CVF too fragmented --------k-2F4A11BX0006----------------------- INT 2F - DBLSPACE.BIN - "DeactivateDrive" - UNMOUNT COMPRESSED DRIVE AX = 4A11h BX = 0006h DL = drive number (0=A:) to unmount Return: AX = status (0000h,0102h) (see #1519) SeeAlso: AX=4A11h/BX=0000h,AX=4A11h/BX=0005h --------k-2F4A11BX0007----------------------- INT 2F - DBLSPACE.BIN - "GetDriveSpace" - GET SPACE AVAIL ON COMPRESSED DRIVE AX = 4A11h BX = 0007h DL = compressed drive number (0=A:) Return: AX = status (0000h,0102h) (see also #1519) 0000h successful DS:SI -> free space record (see #1522) Program: DBLSPACE.BIN is the resident driver for DoubleSpace, the disk-compression software bundled with MS-DOS 6.0 SeeAlso: AX=4A11h/BX=0000h,AX=4A11h/BX=0008h Format of DBLSPACE free space record: Offset Size Description (Table 1522) 00h DWORD total number of sectors in drive's sector heap 04h DWORD number of free sectors in drive's sector heap --------k-2F4A11BX0008----------------------- INT 2F - DBLSPACE.BIN - "GetFileFragmentSpace" - GET SIZE OF FRAGMENT HEAP AX = 4A11h BX = 0008h DL = compressed drive number (0=A:) Return: AX = status (0000h,0102h) (see also #1519) 0000h successful BX = maximum entries in File Fragment heap CX = available entries in File Fragment heap SeeAlso: AX=4A11h/BX=0000h,AX=4A11h/BX=0007h,AX=4A11h/BX=0009h --------k-2F4A11BX0009----------------------- INT 2F - DBLSPACE.BIN - "GetExtraInfo" - DETERMINE NUMBER OF DISK_UNIT STRUCTS AX = 4A11h BX = 0009h DL = compressed drive number (0=A:) Return: AX = status (see also #1519) 0000h successful CL = number of DISK_UNIT structures allocated (see AX=4A11h/BX=0005h) CH = DoubleGuard enabled-checks bitflags in bits 6-0 (DOS 6.2) Note: the DoubleGuard checks are enabled or disabled as a block by the DoubleGuard= line in DBLSPACE.INI; they may be individually set with the CheckSum= line. SeeAlso: AX=4A11h/BX=0000h,AX=4A11h/BX=0008h --------k-2F4A11BX000A----------------------- INT 2F - DBLSPACE.BIN v6.2 - SET AUTOMOUNT DRIVES AX = 4A11h BX = 000Ah CX:DX = bitmask of drives on which to enable AutoMount (DX bit 0 = A:, CX bit 0 = P:, etc.) Return: AX = 0000h if supported CX:DX = old mask or 0000h:0000h on error BX destroyed SeeAlso: AX=4A11h/BX=000Bh --------k-2F4A11BX000B----------------------- INT 2F - DBLSPACE.BIN v6.2 - GET AUTOMOUNT DRIVES AX = 4A11h BX = 000Bh Return: AX = 0000h if supported CX:DX = mask of drives with AutoMount enabled 0000h:0000h on error BX destroyed SeeAlso: AX=4A11h/BX=000Ah --------k-2F4A11BXFFFE----------------------- INT 2F U - DBLSPACE.BIN - RELOCATE AX = 4A11h BX = FFFEh ES = segment to which to relocate DBLSPACE.BIN Return: ??? Notes: called by DBLSPACE.SYS to relocate DBLSPACE.BIN to its final position in memory this function also unhooks and discards the code providing this function and AX=4A11h/BX=FFFFh this function is also supported by the version of SuperStor bundled with IBM DOS 6.x and "preloading" versions of Stacker SeeAlso: AX=4A11h/BX=FFFFh --------k-2F4A11BXFFFF----------------------- INT 2F U - DBLSPACE.BIN - GET RELOCATION SIZE AX = 4A11h BX = FFFFh Return: AX = number of paragraphs needed by DBLSPACE.BIN Note: used by DBLSPACE.SYS to relocate the DBLSPACE driver to its final position in memory this function is also supported by the version of SuperStor bundled with IBM DOS 6.x and "preloading" versions of Stacker SeeAlso: AX=4A11h/BX=0000h,AX=4A11h/BX=FFFEh --------k-2F4A12CX4D52----------------------- INT 2F - Microsoft Realtime Compression Interface (MRCI) - RAM-BASED SERVER AX = 4A12h CX = 4D52h ("MR") DX = 4349h ("CI") Return: CX = 4943h ("IC") if installed DX = 524Dh ("RM") if installed ES:DI -> MRCINFO structure (see #0544 at INT 1A/AX=B001h) Note: this call is functionally identical to INT 1A/AX=B001h, but should be called first, as the latter call is used for the first, ROM-based MRCI server, while this call is used for RAM-based servers which may be partially or entirely replacing a prior server SeeAlso: AX=4A12h/CX=5354h,INT 1A/AX=B001h --------k-2F4A12CX5354----------------------- INT 2F - Stacker 4 LZS Compression Interface (LZSAPI) AX = 4A12h CX = 5354h ("ST") DX = 4143h ("AC") Return: AX = 4F4Bh ("OK") if installed CX = 7374h ("st") if installed DX = 6163h ("ac") if installed ES:DI -> entry point in LZSAPI server (usually, driver STACKER.COM) containing far address of an actual LZSINFO structure (see #1523) SeeAlso: AX=4A12h/CX=4D52h,INT 25/AX=CDCDh Format of LZSINFO structure: Offset Size Description (Table 1523) 00h 6 BYTEs signature "LZSAPI" 06h WORD server version (200 (0C8h) for Stacker 4 and Stacker Anywhere) 08h 4 BYTEs vendor signature "STAC" = Stac Electronics, Inc. 0Ch 6 BYTEs ??? 12h WORD bit flags: server status/capabilities (see #1524) 14h DWORD -> Stacker 3.X-compatible compression procedure 18h DWORD -> Stacker 3.X-compatible decompression procedure 1Ch 4 BYTEs reserved (always set to 0) 20h DWORD -> incremental Stacker 3.x-compatible compression procedure (see #1525) 24h 4 BYTEs ??? 28h DWORD -> incremental Stacker 3.x-compatible decompression procedure (see #1526) 2Ch 4 BYTES ??? 30h DWORD -> new (Stacker 4) compression procedure 34h 4 BYTEs ??? 38h DWORD -> new (Stacker 4) decompression procedure Notes: Stacker 4 usally keeps two different data-compression algorithms in memory (preferably in XMA): 1) new (Stacker 4) data compression algorithm (4K LZ77 with hashing and static Huffman encoding), and 2) old (Stacker 3.x-compatible) one (2K LZ77 with hashing), which is used to work with STACVOL files created under older versions of Stacker. Bitfields for LZSAPI capabilities: Bit(s) Description (Table 1524) 0 ??? 1 busy/error flag 2-10 ??? 11 maximum compressor/decompressor presented (Table 1525) Call Stacker 3.x-style non-incremental functions with: STACK: DWORD return address for compress/decompress procedure WORD compression algorithm parameters (see #1527) WORD size of destination buffer (in bytes) DWORD address of destination buffer WORD size of source buffer (in bytes) DWORD address of source buffer Return: (compression/decompression procedure) AX = size of resulting data in destination buffer 0000h if error (either destination buffer too small or error in compressed data) (Table 1526) Call Stacker 4-style incremental procedures with: STACK: DWORD return address for compr./decompr. procedure DWORD address of LZSSWAP structure (see #1528) if 0000:0000, procedure uses non-incremental technique WORD compression algorithm parameters (see #1527) WORD size of destination buffer (in bytes) DWORD address of destination buffer WORD size of source buffer (in bytes) DWORD address of source buffer (Table 1527) Values for Compression algorithm parameters: Value Compression level (/P=xx parameter) 07F9h 1 0621h 2 0625h 3 0665h 4 0669h 5 06E9h 6 06EDh 7 07D1h 8 07D9h 9 Format of LZSSWAP structure: Offset Size Description (Table 1528) 00h 2 BYTEs signature "CS" 02h 6 BYTEs reserved 08h DWORD address of destination buffer swapping procedure 0Ch DWORD address of stack swapping procedure --------k-2F4A13----------------------------- INT 2F U - DBLSPACE.BIN - GET ??? ENTRY POINTS AX = 4A13h Return: AX = 134Ah if supported ES:BX -> entry point record (see #1529) SeeAlso: AX=4A11h/BX=0000h Format of DBLSPACE entry point record: Offset Size Description (Table 1529) 00h DWORD pointer to FAR function for ??? 04h 5 BYTEs FAR JUMP instruction to ??? --------N-2F4B------------------------------- INT 2F - LAN Manager 2.0 DOS Enh NETWKSTA.EXE - NETWORK WORKSTATION REDIRECTOR AH = 4Bh ??? Return: ??? Note: LAN Manager enhanced mode adds features beyond the standard redirector file/printer services SeeAlso: AX=118Ah,AX=4100h,AH=42h --------T-2F4B01----------------------------- INT 2F C - DOS 5+ TASK SWITCHER - BUILD CALLOUT CHAIN AX = 4B01h CX:DX -> task switcher entry point (see #1532) ES:BX = 0000h:0000h Return: ES:BX -> callback info structure (see #1530) or 0000h:0000h Notes: called by the task switcher this function is hooked by clients which require notification of task switcher activities; the call must first be passed on to the prior handler with registers unchanged using a simulated interrupt. On return, the client must build a callback info structure and store the returned ES:BX in the "next" field, then return the address of its own callback info structure. a client program must add itself to the notification chain if it provides services to other programs; before terminating, it must remove itself from the chain by calling the task switcher's entry point with AX=0005h (see #1532) the task switcher entry point should not be saved, as it is subject to change and will be provided on any notification call the Windows 3.1 Standard Mode supports this API SeeAlso: AX=160Bh,AX=4B02h Format of task switcher callback info structure: Offset Size Description (Table 1530) 00h DWORD pointer to next callback info structure 04h DWORD pointer to notification function (see #1531) 08h DWORD reserved 0Ch DWORD address of zero-terminated list of API info structures (see #1534) (Table 1531) Values task switcher notification function is called with: AX = function 0000h switcher initialization Return: AX = status 0000h if OK to load nonzero to abort task switcher 0001h query suspend BX = session ID Return: AX = status 0000h if OK to switch session 0001h if not 0002h suspend session BX = session ID interrupts disabled Return: AX = 0000h if OK to switch session = 0001h if not 0003h activate session BX = session ID CX = session status flags bit 0: set if first activation of session bits 1-15: reserved (0) interrupts disabled Return: AX = 0000h 0004h session active BX = session ID CX = session status flags bit 0: set if first activation of session bits 1-15: reserved (0) Return: AX = 0000h 0005h create session BX = session ID Return: AX = 0000h if OK to create session = 0001h if not 0006h destroy session BX = session ID Return: AX = 0000h 0007h switcher termination BX = flags bit 0: set if calling switcher is only switcher loaded bits 1-15: reserved (0) Return: AX = 0000h ES:DI -> task switcher entry point (see #1532) Notes: function 0000h is generally called by the program which controls or invokes the task switcher, rather than by the task switcher itself; the entry point supplied to this function is not necessarily the entry point to the task switcher itself, and may be 0000h:0000h. If any client indicates that loading is not possible, all clients will be called with function 0007h; thus it is possible for a client to receive a termination notice without a corresponding initialization notice. except for functions 0002h and 0003h, the notification handler is called with interrupts enabled and may make any INT 21h function call; interrupts must not be enabled in functions 0002h and 0003h function 0007h may be called with ES:DI = 0000h:0000h if the entry point is no longer valid --------T-2F4B02BX0000----------------------- INT 2F - DOS 5+ TASK SWITCHER - INSTALLATION CHECK AX = 4B02h BX = 0000h ES:DI = 0000h:0000h Return: ES:DI = 0000h:0000h if task switcher not loaded ES:DI -> task switcher entry point (see #1532) if loaded AX = 0000h Notes: the returned entry point is that for the most-recently loaded task switcher; the entry points for prior task switchers may be determined with the "get version" call (see #1532) this function is supported by PC Tools v8+ CPTASK SeeAlso: AX=4A05h,AX=4B03h (Table 1532) Call task switcher entry point with: AX = 0000h get version Return: CF clear if successful AX = 0000h ES:BX -> task switcher version struct (see #1533) CF set if unsupported function AX = 0001h test memory region ES:DI -> first byte to be tested CX = size of region to test Return: CF clear if successful AX = memory type of tested region 0000h global 0001h global and local 0002h local (replaced on session switch) CF set if unsupported function AX = 0002h suspend switcher ES:DI -> new task switcher's entry point Return: CF clear if successful AX = state 0000h switcher has been suspended 0001h switcher not suspended, new switcher must abort 0002h switcher not suspended, but new switcher may run anyway CF set if unsupported function AX = 0003h resume switcher ES:DI -> new task switcher's entry point Return: CF clear if successful AX = 0000h CF set if unsupported function AX = 0004h hook notification chain ES:DI -> callback info structure to be added to chain (see #1530) Return: CF clear if successful AX = 0000h CF set if unsupported function AX = 0005h unhook notification chain ES:DI -> callback info structure to be removed from chain (see #1530) Return: CF clear if successful AX = 0000h CF set if unsupported function AX = 0006h query API support BX = asynchronous API identifier Return: CF clear if successful AX = 0000h ES:BX -> API info structure (see #1534) for the client which provides the highest level of API support CF set if unsupported function Format of task switcher version structure: Offset Size Description (Table 1533) 00h WORD major version of supported protocol (current protocol is 1.0) 02h WORD minor version of supported protocol 04h WORD major version of task switcher 06h WORD minor version of task switcher 08h WORD task switcher ID (see AX=4B03h) 0Ah WORD operation flags bit 0: set if task switcher disabled bits 1-15: reserved (0) 0Ch DWORD pointer to ASCIZ task switcher name ("MS-DOS Shell Task Switcher" for DOSSHELL task switcher) 10h DWORD pointer to previous task switcher's entry point or 0000h:0000h Format of API info structure: Offset Size Description (Table 1534) 00h WORD size of structure in bytes (000Ah) 02h WORD API identifier 0001h NetBIOS 0002h 802.2 0003h TCP/IP 0004h LAN Manager named pipes 0005h Novell NetWare IPX 04h WORD major version \ of highest version of API for which the support 06h WORD minor version / level specified in the next field is provided 08h WORD support level 0001h minimal support 0002h API-level support 0003h switcher compatibility 0004h seamless compatibility --------T-2F4B03----------------------------- INT 2F - DOS 5+ TASK SWITCHER - ALLOCATE SWITCHER ID AX = 4B03h ES:DI -> task switcher entry point (see #1532) Return: AX = 0000h BX = switcher ID (0001h-000Fh), or 0000h if no more available Notes: if a task switcher has determined that it is the first to be loaded, it must allocate an identifier for itself and provide this function to all subsequent task switchers; if it is not the first to be loaded, it must call this function to allocate an ID. The switcher ID is used as the high four bits of all session identifiers to ensure unique session IDs. if no more switcher IDs are available, the new task switcher making the call must terminate or disable itself the task switcher providing the identifiers may call the new task switcher's entry point as needed this call is available from within DOSSHELL even if the task switcher is not installed this function is supported by PC Tools v8+ CPTASK, but appears to always return an ID of 0000h SeeAlso: AX=4B02h,AX=4B04h --------T-2F4B04----------------------------- INT 2F - DOS 5+ TASK SWITCHER - FREE SWITCHER ID AX = 4B04h BX = switcher ID ES:DI -> task switcher entry point (see #1532) Return: AX = 0000h BX = status 0000h successful other error (invalid ID or ID not allocated) Notes: called by a task switcher when it exits, unless it was the first loaded and is providing the support for AX=4B03h and AX=4B04h the task switcher providing the identifiers may call the terminating task switcher's entry point as needed this call is available from within DOSSHELL even if the task switcher is not installed this call is supported by PC Tools v8+ CPTASK, but appears to return sucessfully no matter which ID is given SeeAlso: AX=4B02h,AX=4B03h --------T-2F4B05----------------------------- INT 2F C - DOS 5+ TASK SWITCHER - IDENTIFY INSTANCE DATA AX = 4B05h ES:BX = 0000h:0000h CX:DX -> task switcher entry point (see #1532) Return: ES:BX -> startup info structure (see #1535) or 0000h:0000h Notes: called by task switcher clients with instance data should hook this call, pass it through to the previous handler with unchanged registers using a simulated interrupt. On return, the client should create a startup info structure (see #1535), store the returned ES:BX in the "next" field, and return the address of the created structure in ES:BX all MS-DOS function calls are available from within this call SeeAlso: AX=1605h,AX=160Bh,AX=4B02h Format of task switcher startup info structure: Offset Size Description (Table 1535) 00h 2 BYTEs major, minor version of info structure (03h,00h) 02h DWORD pointer to next startup info structure or 0000h:0000h 06h DWORD 0000h:0000h (ignored) 0Ah DWORD ignored 0Eh DWORD pointer to instance data records (see #1536) Format of one instance data record in array: Offset Size Description (Table 1536) 00h DWORD address of instance data (end of array if 0000h:0000h) 04h WORD size of instance data --------W-2F4B06----------------------------- INT 2F - MS Windows - WIN.COM - GET ??? POINTER TO WIN.COM AX = 4B06h Return: AX = 0000h ES:BX -> ??? function in WIN.COM Note: the entry point is called with AX = 0001h or 0003h BX = ??? SeeAlso: AX=4B80h --------W-2F4B20----------------------------- INT 2F - MS Windows 3 - WIN.COM - SET PROGRAM TO EXECUTE ON EXIT AX = 4B20h Return: AX = 0000h if successful DX:CX -> 256-byte buffer for pathname and commandline (see #1537) Note: when the Windows function ExitWindows is called with an exit code of 44h, WIN.COM executes the program specified in the returned buffer and then restarts Windows Format of WIN.COM buffer: Offset Size Description (Table 1537) 00h 128 BYTEs ASCIZ pathname of program to execute 80h 128 BYTEs commandline for program --------W-2F4B80----------------------------- INT 2F - MS Windows - WSWAP.EXE - RESET INTERNAL VARIABLES AX = 4B80h Return: nothing Note: called by WINOLDAP.MOD SeeAlso: AX=4B06h --------p-2F4C------------------------------- INT 2F U - Advanced Power Management AH = 4Ch AL = function 00h version check 01h suspend system requested FFh suspend/resume battery notification ??? Return: ??? ----------2F4D------------------------------- INT 2F U - ??? AH = 4Dh ??? Return: ??? Note: reportedly called by Kana Kanji Converter and MSKK --------N-2F4E53BL00------------------------- INT 2F - SilverNET v2+ - INSTALLATION CHECK AX = 4E53h ("NS") BL = 00h (function "installation check") BH = module ID (see #1538) Return: AX = 0000h if specified module installed BX = 4E53h if installed Program: SilverNET is an SMB-compatible peer-to-peer NOS for DOS or Windows systems, by Net-Source, Inc. of Santa Clara, CA. SeeAlso: AX=4E53h/BL=01h,AX=4E53h/BL=02h,AX=B800h,AX=B809h (Table 1538) Values for SilverNET module ID: 01h SilverCACHE 02h Workstation 03h NetBIOS 04h Peer 20h NS Share 80h NetWare help TSR --------N-2F4E53BL01------------------------- INT 2F - SilverNET - GET RUNTIME PARAMETER AX = 4E53h ("NS") BL = 01h (function "get runtime parameter") BH = module ID (see #1538) CX = parameter index (see #1539,#1541,#1542) Return: AX = WORD value at specified index (see #1540) Desc: retrieve a word of data from the specified SilverNET module (Table 1539) Values for SilverNET Peer parameter index (* = read-only): 00h * maximum outstanding SMB buffers 02h * maximum logged-in nodes 04h * number of shareable resources 06h * number of characters to print per time slice 08h * number of printers that can be shared 0Ah * number of nodes logged in 0Ch * number of files to allow opened 0Eh how fast to despool (/PSLICE) 10h audit flag 24h * far pointer to resource table (each resource is 96 bytes in length) 32h * far pointer to SFT (internal if SilverNET files > CONFIG.SYS files, else DOS SFT) 36h spool flags (see #1540) Bitfields for spool flags: Bit(s) Description (Table 1540) 0 LPT1 needs despooling 1 LPT2 needs despooling 2 LPT2 needs despooling 4 COM1 needs despooling 5 COM2 needs despooling 6 COM3 needs despooling (Table 1541) Values for NS Share parameter index (* = read-only): 00h version number (high byte = minor, low byte = major) 10h * segment of first lock record (other records in consecutive paragraphs) (if PSP field = 0000h, lock record is free) 12h * maximum possible number of lock records 14h * starting segment of sharing buffer (NS Share's sharing records are identical to DOS SHARE except that fields which are normally offsets into SHARE are segment numbers) 18h * size of sharing buffer in paragraphs 1Ah * total free paragraphs in sharing buffer 1Ch * current number of shared files 1Eh * current number of locked records (Table 1542) Values for Workstation parameter index (* = read-only): 00h version number (high byte = minor, low byte = major) 02h * size of each network buffer for file operations 04h * number of redirector file buffers 06h * size of each print cache buffer 08h * number of network LPT printers 0Ch flush time in ticks (idle time on network printer before flushing) 0Eh (16 WORDs) last active time for each printer 2Eh * stub segment if program split into two parts 60h receive name number for datagram listens 62h * 18-byte machine name 74h * LASTDRIVE (01h = A:, etc.) 7Ch row number of message box on screen 7Eh message time in clock ticks 82h * number of network adapters in use 84h station ID broadcast flag (never set on redirectors) 96h * NetBIOS names left 98h * NCBs left 9Ah * sessions left A2h * total number of network printers (LPT+COM) A4h * number of serial network printers A8h * segment containing file cache buffers AAh * segment containing print cache buffers ACh * bytes remaining free in HMA before program loaded AEh * start of free memory in HMA B2h * flag: using HMA --------N-2F4E53BL02------------------------- INT 2F - SilverNET - SET RUNTIME PARAMETERS AX = 4E53h ("NS") BL = 02h (function "set runtime parameters") BH = module ID (see #1538) CX = parameter index (see #1541,#1542) DX = new value for specified parameter Desc: set a WORD value in the specified SilverNET module Note: not all indexed parameters are writable; modifying a read-only parameter can result in system crashes SeeAlso: AX=4E53h/BL=00h,AX=4E53h/BL=01h --------N-2F5100----------------------------- INT 2F U - ODIHLP.EXE - INSTALLATION CHECK AX = 5100h Return: AL = FFh if installed BX = 0000h DX:SI -> signature string "ODI$HLP$" Program: ODIHLP is a real-mode helper allowing the Windows for Workgroups 3.11 protected-mode NDIS3 protocol to work with real-mode ODI drivers and LSL.COM Note: the returned signature string might be the first field of a structure SeeAlso: AX=C000h"LSL.COM" --------k-2F5200----------------------------- INT 2F - JAM.SYS v1.10+ - "GetVersion" - INSTALLATION CHECK AX = 5200h Return: AH = 80h (successful) if installed BX = internal JAM.SYS version number CX = size of JAMINFO structure (see #1543,#1544) DX = JAM.SYS segment address Program: JAM.SYS is a main component of the JAM Real-Time Data Compression Utilities by George A. Reznik and friends (JAM Software). SeeAlso: AX=5201h Format of JAMINFO v1.10 structure: Offset Size Description (Table 1543) 00h 25 BYTEs extended BIOS parameter block (BPB) 19h 11 BYTEs ??? 25h DWORD total number of sectors in JAM archive file (size of compressed data area) 29h BYTE flags (see #1545) 2Ah 127 BYTEs full JAM archive file name A9h WORD the number of fragments in archive file ABh 96 BYTEs archive file fragmentation list - array of 16 FRAGMENT structures (see #1546) 10Bh DWORD address of the host-drive DPB (Drive Parameter Block) 10Fh DWORD number of free sectors in JAM archive file 113h WORD device status word (see #1547) SeeAlso: #1544 Format of JAMINFO v1.20 structure: Offset Size Description (Table 1544) 00h 25 BYTEs extended BIOS parameter block (BPB) 19h BYTE physical driver number 1Ah BYTE reserved 1Bh BYTE extended boot record signature 1Ch DWORD volume serial number 20h 11 BYTEs volume label 2Bh 8 BYTEs file system ID 33h DWORD total number of sectors in JAM archive file (size of compressed data area) 37h BYTE flags (see #1545) 38h 128 BYTEs full JAM archive file name B8h WORD the number of fragments in archive file BAh 96 BYTEs archive file fragmentation list - array of 16 FRAGMENT structures (see #1546) 11Ah DWORD address of the host-drive DPB (Drive Parameter Block) 11Eh DWORD number of free sectors in JAM archive file 122h WORD device status word (see #1547) Note: the first 33h bytes are copied from the archive file's boot sector SeeAlso: #1543 Bitfields for JAMINFO flags: Bit(s) Description (Table 1545) 2-0 reserved 3 (v1.20+) 4 enable direct write requests (Int 26h, non-DOS requests, etc.) 5 read-only mode 6 no write-behind caching 7 full undelete-compatible allocation strategy SeeAlso: #1543,#1544 Format of JAM FRAGMENT structure: Offset Size Description (Table 1546) 00h WORD starting sector (low word) 02h BYTE starting sector (high byte) 03h WORD size of fragment (low word) 05h BYTE size of fragment (high byte) SeeAlso: #1543,#1544 (Table 1547) Values for JAM.SYS status (high byte): 00h successful 01h drive is not a JAM drive 02h drive is already attached 03h archive file cluster size value is larger than driver's one 04h drive is not attached 05h drive is locked 06h drive is not locked 07h bad physical-level request 08h host drive reading/writing error 09h bad entries in JAM descriptor table 0Ah compressed data integrity error 0Bh archive file overflow 0Ch bad DOS request 0Dh incorrect parameters in JAMINFO structure Note: the low byte of the status is the DOS error code for the Host drive SeeAlso: #1383 at INT 2F/AX=0802h --------k-2F5201----------------------------- INT 2F - JAM.SYS v1.10+ - "GetInfo" - GET COMPRESSED DRIVE INFORMATION AX = 5201h DL = compressed drive number (0-default, 1-A:, etc.) DS:BX -> buffer for JAMINFO structure (see #1543,#1544) Return: AH = status (00h,01h) (see #1547) SeeAlso: AX=5200h --------k-2F5202----------------------------- INT 2F - JAM.SYS v1.10+ - "Attach" - MOUNT COMPRESSED DRIVE AX = 5202h DL = drive number (0-default, 1-A:, etc.) to attach to the JAM archive file DS:BX -> pointer to JAMINFO structure (see #1543,#1544), which contains parameters of the JAM file to mount, and pointer to the host drive DPB (i.e. DPB of the drive on which the JAM file is located) Return: AH = status (00h,02h,03h,08h,09h,0Dh) (see also #1547) 03h archive file cluster size value is larger than driver's - not mounted 09h bad entries in JAM descriptor table - file mounted read-only AL = host drive error code (see #1383 at INT 2F/AX=0802h) SeeAlso: AX=5203h --------k-2F5203----------------------------- INT 2F - JAM.SYS v1.10+ - "Detach" - UNMOUNT COMPRESSED DRIVE AX = 5203h DL = drive number (0-default, 1-A:, etc.) to detach Return: AH = status (00h,01h,04h,05h,08h,09h,0Bh,0Dh) (see #1547) AL = host drive error code (see #1383 at INT 2F/AX=0802h) SeeAlso: AX=5202h --------k-2F5204----------------------------- INT 2F - JAM.SYS v1.10+ - "Lock" - LOCK COMPRESSED DRIVE AX = 5204h DL = drive number (0-default, 1-A:, etc.) to lock Return: AH = status (00h,01h,04h,05h,08h,09h,0Bh,0Dh) (see #1547) AL = host drive error code (see #1383 at INT 2F/AX=0802h) SeeAlso: AX=5205h, AX=5206h, AX=5207h --------k-2F5205----------------------------- INT 2F - JAM.SYS v1.10+ - "UnLock" - UNLOCK COMPRESSED DRIVE AX = 5205h DL = drive number (0-default, 1-A:, etc.) to unlock Return: AH = status (00h,01h,04h,06h,08h,09h,0Dh) (see #1547) AL = host drive error code (see #1383 at INT 2F/AX=0802h) SeeAlso: AX=5204h, AX=5206h, AX=5207h Note: Lock and UnLock functions were added to the JAM API to prevent asynchronous physical-level access (see AX=5206h,AX=5207h) to compressed data on JAM drives. In other words, two or more programs which use JAM API (say, JMAX optimizer and JCHKDSK - disk checker) cannot be run on the same JAM drive simultaneously. --------k-2F5206----------------------------- INT 2F - JAM.SYS v1.10+ - "Read" - PHYSICAL READ DATA FROM JAM ARCHIVE AX = 5206h DL = drive number (0-default, 1-A:, etc.) DS:BX -> disk transfer packet (see #1548) Return: AH = status (00h,01h,04h,06h,07h,08h,0Dh) (see #1547) AL = host drive error code (see #1383 at INT 2F/AX=0802h) Program: JAM.SYS is a main component of the JAM Real-Time Data Compression Utilities by George A. Reznik and friends (JAM Software). SeeAlso: AX=5207h Format of disk transfer packet: Offset Size Description (Table 1548) 00h DWORD sector number 04h WORD number of sectors to read(write) 06h DWORD transfer address --------k-2F5207----------------------------- INT 2F - JAM.SYS v1.10+ - "Write" - PHYSICAL WRITE DATA TO JAM ARCHIVE AX = 5207h DL = drive number (0-default, 1-A:, etc.) DS:BX -> disk transfer packet (see #1548) Return: AH = status (00h,01h,04h,06h,07h,08h,0Dh) (see #1547) AL = host drive error code (see #1383 at INT 2F/AX=0802h) SeeAlso: AX=5206h --------p-2F53------------------------------- INT 2F U - POWER.EXE - APM event broadcasting??? AH = 53h AL = event??? 05h CPU idle 0Bh PM event broadcast API Return: ??? Note: called by MS Windows 3.1 POWER.DRV; hooked by MS Mouse driver v8.20+ and PC-Cache v8.0 SeeAlso: AX=530Bh,AH=54h,INT 33/AX=002Fh --------p-2F530B----------------------------- INT 2F U - ??? (MOUSEPWR.COM, others) - ??? AX = 530Bh BX = subfunction 0003h ??? 0004h ??? ??? Return: ??? Note: it appears that subfunction 0003h reads or restores the current mouse settings (the MS Mouse driver hooks AX=530Bh), and 0004h might be the converse --------p-2F5400----------------------------- INT 2F U - POWER.EXE - INSTALLATION CHECK AX = 5400h Return: AX = POWER.EXE version (AH = major, AL = minor) if installed BX = 504Dh ("PM") CF clear Note: called by MS Windows 3.1 POWER.DRV SeeAlso: AH=53h,AX=5401h,AX=5402h,AX=5481h,AX=5482h --------p-2F5401----------------------------- INT 2F U - POWER.EXE - GET/SET POWER STATUS AX = 5401h BH = function 00h get status Return: BL = current power management status (see #1549) 01h set status BL = new power managment status (see #1549) Return: AX = function status (see #1550) Note: called by MS Windows 3.1 POWER.DRV SeeAlso: AH=53h,AX=5400h,AX=5402h,AX=5403h Bitfields for power management status: Bit(s) Description (Table 1549) 0 POWER.EXE power management enabled 1 APM firmware power management enabled 2-7 reserved (0) Notes: bit 1 is ignored if there is no APM firmware bits 1-0: 00 = POWER OFF, 10 = POWER STD, 11 = POWER ADV (Table 1550) Values for POWER.EXE function status: 0000h successful 0002h "ERROR_PM_ALREADY_CONNECTED" 0003h "ERROR_PM_NOT_CONNECTED" 0087h "ERROR_PM_INVALID_PARAMETER" --------p-2F5402----------------------------- INT 2F U - POWER.EXE - GET/SET IDLE DETECTION STRATEGY AX = 5402h BH = subfunction 00h get other set BL = detection strategy (00h-0Fh or FFh) Return: BX = current/new detection strategy SeeAlso: AH=53h,AX=5400h,AX=5401h,AX=5481h,AX=5482h --------p-2F5403----------------------------- INT 2F U - POWER.EXE - GET/SET ADVANCED POWER MANAGEMENT SETTING AX = 5403h BX = new power management setting or 0000h to get current setting Return: AX = status 0000h successful BX = power management setting (see #1551) other error code SeeAlso: AX=5401h,AX=5480h (Table 1551) Values for power management setting: 0001h-0005h "min" 0006h "reg" 0007h-0008h "max" --------t-2F5453----------------------------- INT 2F - TesSeRact RAM-RESIDENT PROGRAM INTERFACE AX = 5453h BX = subfunction 00h installation check CX = 0000h DS:SI -> 8-char blank-padded name (see #1552) Return: AX = FFFFh installed CX = ID number of already-installed copy AX = anything else, not installed CX = ID number for TSR when installed 01h get user parameters CX = TSR ID number Return: AX = status 0000h successful ES:BX -> user parameter block (see #1553) nonzero failed 02h check if hotkey in use CL = scan code of hot key Return: AX = FFFFh hot key conflicts with another TSR otherwise safe to use the hotkey 03h replace default critical error handler CX = TSR ID number DS:SI -> new routine for INT 24h Return: AX = nonzero, unable to install new handler 04h get internal data area CX = TSR ID number Return: AX = status 0000h successful ES:BX -> TSR's internal data area (see #1554) nonzero, TSR not found 05h set multiple hot keys CX = TSR ID number DL = number of additional hot keys to allocate DS:SI -> table of hot keys BYTE hotkey scan code BYTE hotkey shift state BYTE flag value to pass to TSR (nonzero) Return: AX = nonzero, unable to install hot keys 06h - 0Fh reserved 10h enable TSR CX = TSR ID number Return: AX = nonzero, unable to enable 11h disable TSR CX = TSR ID number Return: AX = nonzero, unable to disable 12h unload TSR CX = TSR ID number Return: AX = nonzero, invalid TSR number Note: if any interrupts used by TSR have been grabbed by another TSR, the TesSeRact routines will wait until it is safe to remove the indicated TSR from memory 13h restart TSR CX = TSR ID number of TSR which was unloaded but is still in memory Return: AX = nonzero, unable to restart TSR 14h get status word CX = TSR ID number Return: AX = FFFFh invalid ID number = other, successful BX = bit flags 15h set status word CX = TSR ID number DX = new bit flags Return: AX = nonzero, unable to set status word 16h get INDOS state at popup CX = TSR ID number Return: AX = 0000h successful BX = value of INDOS flag 17h - 1Fh reserved 20h call user procedure CX = TSR ID number ES:DI -> user-defined data Return: AX = 0000h successful 21h stuff keystrokes into keyboard buffer CX = TSR ID number DL = speed 00h stuff keystrokes only when buffer is empty 01h stuff up to four keystrokes per clock tick 02h stuff up to 15 keystrokes per clock tick DH = scan code flag if zero, buffer contains alternating ASCII and scan codes if nonzero, buffer contains only ASCII codes SI = number of keystrokes ES:DI -> buffer to stuff Return: AX = 0000h success F0F0h user aborted with ^C or ^Break other unable to stuff keystrokes 22h (v1.10) trigger popup CX = TSR ID number Return: AX = 0000h success, TSR will either pop up or beep to indicate that it is unable to pop up nonzero invalid ID number 23h (v1.10) invoke TSR's background function CX = TSR ID number Return: AX = 0000h success FFFFh not safe to call background function nonzero invalid ID number 24h - 2Fh reserved Notes: Borland's THELP.COM popup help system for Turbo Pascal and Turbo C (versions 1.x and 2.x only) fully supports the TesSeRact API, as do the SWAP?? programs by Innovative Data Concepts. AVATAR.SYS supports functions 00h and 01h (only the first three fields of the user parameter block) using the name "AVATAR " SeeAlso: AX=CAFEh,INT 16/AX=55FFh,INT 2D"AMIS" Index: installation check;TesSeRact TSR interface|uninstall;TesSeRact (Table 1552) Values for TesSeRact names: "AVATAR " AVATAR.SYS "QeditTSR" TSR version of SemWare's Qedit editor "SCRNBLNK" Trusted Access screen blanker Format of TesSeRact User Parameter Block: Offset Size Description (Table 1553) 00h 8 BYTEs blank-padded TSR name 08h WORD TSR ID number 0Ah DWORD bitmap of supported functions 0Eh BYTE scan code of primary hotkey 00h = pop up when shift states match FFh = no popup (if shift state also FFh) 0Fh BYTE shift state of primary hotkey FFh = no popup (if scan code also FFh) 10h BYTE number of secondary hotkeys 11h DWORD pointer to extra hotkeys set by func 05h 15h WORD current TSR status flags 17h WORD PSP segment of TSR 19h DWORD DTA for TSR 1Dh WORD default DS for TSR 1Fh DWORD stack at popup 23h DWORD stack at background invocation Index: hotkeys;TesSeRact TSR interface Format of TSR internal data area: Offset Size Description (Table 1554) 00h BYTE revision level of TesSeRact library 01h BYTE type of popup in effect 02h BYTE INT 08 occurred since last invocation 03h BYTE INT 13 occurred since last invocation 04h BYTE active interrupts 05h BYTE active soft interrupts 06h BYTE DOS major version 07h BYTE how long to wait before popping up 08h DWORD pointer to INDOS flag 0CH DWORD pointer to DOS critical error flag 10h WORD PSP segment of interrupted program 12h WORD PSP segment of prog interrupted by INT 28 14h DWORD DTA of interrupted program 18h DWORD DTA of program interrupted by INT 28 1Ch WORD SS of interrupted program 1Eh WORD SP of interrupted program 20h WORD SS of program interrupted by INT 28 22h WORD SP of program interrupted by INT 28 24h DWORD INT 24 of interrupted program 28h 3 WORDs DOS 3+ extended error info 2Eh BYTE old BREAK setting 2Fh BYTE old VERIFY setting 30h BYTE were running MS WORD 4.0 before popup 31h BYTE MS WORD 4.0 special popup flag 32h BYTE enhanced keyboard call in use 33h BYTE delay for MS WORD 4.0 11 times (for INTs 08h,09h,13h,16h,1Ch,21h,28h,2Fh,1Bh,23h, and 24h): DWORD old interrupt vector BYTE interrupt number WORD offset in TesSeRact code segment of new interrupt handler --------p-2F5480----------------------------- INT 2F U - POWER.EXE - GET/SET ??? AX = 5480h BX = direction 0000h get other set CX = size of buffer (at least 0010h) DS:SI -> buffer Return: AX = status 0000h successful other error code SeeAlso: AX=5400h,AX=5481h,AX=548Fh --------p-2F5481----------------------------- INT 2F U - POWER.EXE - GET STATISTICS AX = 5481h BX = which statistics 0000h idle detection 0001h APM statistics CX = length of buffer in bytes DS:SI -> buffer for statistics (see #1555,#1556) Return: AX = status 0000h successful 0071h "ERROR_PM_BUFFER_TOO_SMALL" 0087h "ERROR_PM_INVALID_PARAMETER" SeeAlso: AH=53h,AX=5400h,AX=5480h,AX=5402h,AX=5482h Format of POWER.EXE idle detection statistics: Offset Size Description (Table 1555) 00h DWORD "CPU_ON_TIME" total time CPU is active with POWER.EXE idle detection enabled, in timer ticks 04h DWORD "CPU_IDLE_TIME" timer ticks during which CPU was idle (divide by previous to get idle rate) 08h DWORD total idle calls 0Ch DWORD "TOTAL_APP_IDLE" total INT 2Fh idle calls 10h DWORD "TOTAL_DOS_YIELD" total INT 28h idle calls 14h DWORD "TOTAL_KEY_IDLE" total INT 16h idle calls 18h DWORD "TOTAL_DOS_IDLE" total INT 2Ah idle calls Format of APM statistics: Offset Size Description (Table 1556) 00h DWORD "RESUME_COUNT" total number of resumes since last APM_ENABLE --------p-2F5482----------------------------- INT 2F U - POWER.EXE - GET/SET APM POLLING FREQUENCY AX = 5482h BX = new polling frequency or 0000h to get current frequency Return: AX = 0000h (successful) BX = current frequency if BX=0000h on entry SeeAlso: AH=53h,AX=5400h,AX=5401h,AX=5480h,AX=5481h,AX=548Fh --------p-2F548F----------------------------- INT 2F U - POWER.EXE - GET/SET ??? AX = 548Fh BX = ??? or 0000h to get current ??? Return: AX = 0000h (successful) BX = current ??? CX = ??? SeeAlso: AX=5400h,AX=5480h,AX=5482h --------l-2F5500----------------------------- INT 2F U - DOS 5+ - COMMAND.COM INTERFACE AX = 5500h Return: AX = 0000h if an instance of COMMAND.COM is already running DS:SI -> entry point table Notes: used to access the shareable portion of COMMAND.COM, which may have been moved into the HMA; only the primary COMMAND.COM retains this portion procedures called from a dispatcher in COMMAND's resident portion; most assume that the segment address of the resident portion is on the stack and are thus not of general use SeeAlso: AX=5501h --------l-2F5501----------------------------- INT 2F U - DOS 5+ - ROM COMMAND.COM INTERFACE AX = 5501h Return: ??? Note: used to determine whether the caller is the first instance of ROM COMMAND.COM SeeAlso: AX=5500h --------R-2F5600----------------------------- INT 2F - INTERLNK - INSTALLATION CHECK AX = 5600h DX = magic value FFFFh BL = instance number (00h = any, 01h = first loaded, etc.) Return: AL = FFh if installed BL = instance number CX = ??? (apparently always 0001h) DX = resident CS of driver, DX:0000h -> header (see #1557) SeeAlso: AX=5601h,AX=5602h,INT 60/AX=0000h Format of Interlnk device driver header: Offset Size Description (Table 1557) 00h DWORD pointer to next driver, offset=FFFFh if last driver 04h WORD device attributes (see #0859,#0860) 06h WORD device strategy entry point 08h WORD device interrupt entry point 0Ah 8 BYTEs character device name "NUL2 " 12h 165 BYTEs ??? B7h 67 BYTEs fully qualified Interlnk filename FAh 6 BYTEs ??? 100h DWORD pointer back to Interlnk filename at offset B7h 104h 8 BYTEs ??? 10Ch BYTE total number of redirected drives 10Dh BYTE first local drive number (0=A:) 10Eh BYTE printer redirection (0=no, 1=yes) 10Fh BYTE ??? 110h 3 BYTEs LPT1...3 status (0FFh=invalid) 113h 26 BYTEs remote drive number (0=A:, 0FEh=unused) (see note below) 12Dh 26 BYTEs always 0FEh ??? 147h 26 BYTEs always 0FFh ??? Note: to obtain the remote drive number, subtract the value at offset 10Ch from the local drive number before indexing into the table at 113h (example: if local drives F, G, H are remote drives C, F, E then the first three bytes at offset 113h are 02h, 05h, 04h) for each instance of Interlnk, an extra device driver is loaded, but all have the same device name NUL2 SeeAlso: #0858 at INT 21/AH=52h --------R-2F5601----------------------------- INT 2F - INTERLNK - CHECK IF REDIRECTED DRIVE AX = 5601h DX = magic value FFFFh BH = drive number (0=A:) BL = 00h Return: (as for AL=00h if redirected drive) SeeAlso: AX=5600h --------R-2F5602----------------------------- INT 2F - INTERLNK - GET ??? AX = 5602h DX = magic value FFFFh Return: CX = ??? SeeAlso: AX=5600h ----------2F57------------------------------- INT 2F U - ??? AH = 57h ??? Return: ??? Note: reportedly used by Iomega Corp. --------c-2F5758BX4858----------------------- INT 2F U - Helix Multimedia Cloaking - CACHECLK - INSTALLATION CHECK AX = 5758h BX = 4858h ('HX') DX = 4443h ('DC') CX <> 5758h Return: BX = 6878h if installed DX = 6463h if installed CX = version (CH=major,CL=minor) Program: CACHECLK is a 'Cloaked' disk cache by Helix Software Note: returns with registers unchanged if CX=5758h on entry SeeAlso: INT 16/AX=5758h/BX=4858h,INT 2F/AX=4310h"Cloaking" --------X-2F5D00----------------------------- INT 2F U - PCMCIA - AWARD PCDISK - GET INFO FROM DRIVER ??? AX = 5D00h Return: ES:BX -> ??? Note: supported by Ventura Micro / Award PCDISK.EXE v1.02c PCMCIA/ATA driver SeeAlso: AX=5D01h,INT 21/AX=440Dh --------X-2F5D01----------------------------- INT 2F U - PCMCIA - AWARD PCDISK - PUT INFO INTO DRIVER ??? AX = 5D01h ES:BX -> ??? Return: nothing Note: supported by Ventura Micro / Award PCDISK.EXE v1.02c PCMCIA/ATA driver SeeAlso: AX=5D00h,INT 21/AX=440Dh --------s-2F60FFDL00------------------------- INT 2F U - IPLAY v1.00b - INSTALLATION CHECK AX = 60FFh DL = 00h (function number) BX = 5344h ('SD') CX = 4D50h ('MP') Return: AX = 4F4Bh ('OK') if installed Program: IPLAY is the Inertia Player by Prime and Excalibur for .MODules (digitized music files) Note: in version 1.00b, any value for DL except 01h invokes this function SeeAlso: AX=60FFh/DL=01h --------s-2F60FFDL01------------------------- INT 2F U - IPLAY v1.00b - GET DATA SEGMENT AX = 60FFh DL = 01h (function number) BX = 5344h ('SD') CX = 4D50h ('MP') Return: AX = data segment Program: IPLAY is the Inertia Player by Prime and Excalibur for .MODules (digitized music files) SeeAlso: AX=60FFh/DL=00h --------v-2F6282----------------------------- INT 2F U - PC Tools v7.0+ VDEFEND, VSAFE, VWATCH, DATAMON - SET ??? ADDRESS AX = 6282h CX:DX -> ??? or 0000h:0000h DI = segment of ??? record (see #1558) or 0000h/FFFFh to ignore Return: BX = 0062h Note: if CX:DX = 0000h:0000h on entry, the ??? address is not changed (DATAMON only) SeeAlso: INT 13/AH=FAh"VSAFE",INT 21/AH=FAh"VDEFEND" Format of VSAFE/VWATCH record: Offset Size Description (Table 1558) 00h DWORD ??? 04h WORD offset of ??? in record's segment VSAFE 2.0 sets byte at +01h to 56h or 58h VWATCH 2.1 sets byte at +02h to 56h or 58h 06h 2 BYTEs ??? 08h BYTE ??? (01h/other) --------v-2F6284BX0000----------------------- INT 2F U - PC Tools v7-8 DATAMON, v9+ DPROTECT - INSTALLATION CHECK AX = 6284h BX = 0000h CX = 0000h Return: AX = segment of resident code BX = 5555h CX = 5555h Note: also supported by DOS 6 UNDELETE which is licensed from PC Tools SeeAlso: AX=6284h/BX=0001h,INT 16/AX=FFA3h --------v-2F6284BX0001----------------------- INT 2F U - PC Tools v7-8 DATAMON, v9+ DPROTECT - GET ??? AX = 6284h BX = 0001h CX = 0001h Return: AX:BX -> ??? data (see #1559) CX = BX SeeAlso: AX=6284h/BX=0000h Format of DPROTECT data for v9.0: Offset Size Description (Table 1559) 00h 5 BYTEs ??? 05h WORD resident code segment (may be segment of DWORD at +03h) 07h DWORD -> FAR function to sound alert tone ??? --------v-2F6284BX0002----------------------- INT 2F U - PC Tools v7-8 DATAMON, v9+ DPROTECT - GET OPTIONS AX = 6284h BX = 0002h CX = 0002h Return: AX = options (see #1560) BX = ??? (0000h for v9) CX = AX DX = BX Note: also supported by DOS 6 UNDELETE which is licensed from PC Tools SeeAlso: AX=6284h/BX=0000h,AX=6284h/BX=0003h Bitfields for DATAMON/DPROTECT options: Bit(s) Description (Table 1560) 1 ??? 12 disabled 13 using Delete Sentry 14 using Delete Tracker --------v-2F6284BX0003----------------------- INT 2F U - PC Tools v7-8 DATAMON, v9+ DPROTECT - SET OPTION??? FLAGS AX = 6284h BX = 0003h CX = flags (see #1561) DX = flags bit 15: ??? Note: v9 DPROTECT only checks bit 12 of CX, and ignores DX entirely SeeAlso: AX=6284h/BX=0002h Bitfields for DATAMON/DPROTECT CX flags: Bit(s) Description (Table 1561) 3 ??? 5 ??? 10 ??? 12 disable DATAMON/DPROTECT --------v-2F6284BX0004----------------------- INT 2F U - PC Tools v8 DATAMON, v9+ DPROTECT - ??? AX = 6284h BX = 0004h CX = 0004h Return: AX = 5555h BX = ??? (0800h) CX = ??? (FCCCh for v8, FCCBh for v9) --------V-2F6400----------------------------- INT 2F - SCRNSAV2.COM - INSTALLATION CHECK AX = 6400h Return: AL = installation state 00h not installed FFh installed Program: SCRNSAV2.COM is a screen saver for PS/2s with VGA by Alan Ballard SeeAlso: INT 10/AX=5555h,INT 14/AX=AA01h Index: screen saver;SCRNSAV2 --------N-2F7000----------------------------- INT 2F - License Service API - INSTALLATION CHECK AX = 7000h CX = license server index (0000h to 001Fh) Return: AL = status 00h not installed FFh installed Notes: The License Service API is being maintained by Microsoft but is being supported by a large number of companies including Apple, Banyan, DEC, HP, Lotus, Microsoft, Novell, Software Publishers Association, and Wordperfect (not a complete list!) Each license service provider must search for the next free index slot to use SeeAlso: AX=7001h,AX=7003h,AX=7004h,AX=7005h --------N-2F7001----------------------------- INT 2F - License Service API - REQUEST LICENSE AX = 7001h CX = license server index (0000h to 001Fh) DS:DX -> SLSREQUEST structure (see #1562) Return: AX = status 0000h success else provider error code ES:BX = provider specific handle for the license context SeeAlso: AX=7002h,AX=7004h,AX=7005h Format of License Service SLSREQUEST structure: Offset Size Description (Table 1562) 00h DWORD (ret) status code 04h DWORD (ret) handle identifying context 08h DWORD (call) address of Publisher string 0Ch DWORD (call) address of Product string 10h DWORD (call) address of Version string 14h DWORD units required 18h DWORD address of comment string 1Ch DWORD address of SLSCHALLENGE structure (see #1563) Format of License Service SLSCHALLENGE structure: Offset Size Description (Table 1563) 00h DWORD algorithm (currently always 1) 04h DWORD secret to be challenged (1-255) 08h DWORD size of challenge in bytes (1-255) 0Ch N BYTEs challenge data --------N-2F7002----------------------------- INT 2F - License Service API - RELEASE LICENSE AX = 7002h CX = license server index (0000h to 001Fh) DS:DX -> SLSRELEASE structure (see #1564) ES:BX = provider specific handle for the license context Return: AL = status 00h not installed FFh installed SeeAlso: AX=7001h,AX=7005h Format of License Service SLSRELEASE structure: Offset Size Description (Table 1564) 00h DWORD handle indentifying license context 04h DWORD total units consumed 08h DWORD address of comment string --------N-2F7003----------------------------- INT 2F - License Service API - UPDATE AX = 7003h CX = license server index (0000h to 001Fh) DS:DX -> SLSUPDATE structure (see #1565) ES:BX = provider specific handle for the license context Return: AL = status 00h not installed FFh installed SeeAlso: AX=7004h,AX=7005h Format of License Service SLSUPDATE structure: Offset Size Description (Table 1565) 00h DWORD (ret) status code 04h DWORD (call) handle identifying license context 08h DWORD (call) total units consumed 0Ch DWORD additional units required 10h DWORD address of comment string 14h DWORD address of SLSCHALLENGE structure (see #1563) --------N-2F7004----------------------------- INT 2F - License Service API - GET ERROR AX = 7004h CX = license server index (0000h to 001Fh) DS:DX -> SLSGETERROR structure (see #1566) ES:BX = provider specific handle for the license context Return: AL = status 00h not installed FFh installed SeeAlso: AX=7000h,AX=7001h Format of License Service SLSGETERROR structure: Offset Size Description (Table 1566) 00h DWORD (ret) status code 04h DWORD handle identifying license context 08h DWORD error code 0Ch DWORD buffer size in bytes 10h N BYTEs data buffer --------N-2F7005----------------------------- INT 2F - License Service API - QUERY LICENSE AX = 7005h CX = license server index (0000h to 001Fh) DS:DX -> SLSQUERY structure (see #1567) ES:BX = provider specific handle for the license context Return: AL = status 00h not installed FFh installed SeeAlso: AX=7001h,AX=7002h Format of License Service SLSQUERY structure: Offset Size Description (Table 1567) 00h DWORD (ret) status code 04h DWORD handle identifying license context 08h DWORD information index 0Ch DWORD buffer size in bytes 10h N BYTEs data buffer --------K-2F7041BX4B70----------------------- INT 2F U - HP 200LX - KEY200 - INSTALLATION CHECK AX = 7041h BX = 4B70h Return: BX = 7965h if keyboard remapper KEY200.COM installed --------d-2F7200----------------------------- INT 2F - SRDISK v1.30+ - INSTALLATION CHECK AX = 7200h Return: AL = FFh if installed ES = segment of device driver header (see #1568) Program: SRDISK is a freeware resizeable RAMdisk by Marko Kohtala SeeAlso: AX=7201h Format of SRDISK device driver header: Offset Size Description (Table 1568) 00h 10 BYTEs same as standard device driver header (see #0858 at INT 21/AH=52h) 0Ah BYTE number of subunits (drives) supported by driver 0Bh 3 BYTEs signature "SRD" 0Eh 4 BYTEs memory type string ("XMS "/"EMS ") 12h 4 BYTEs ASCII driver version string "N.NN" 16h BYTE 00h 17h BYTE configuration format version (currently 00h or 01h) 18h WORD offset of drive configuration data --------d-2F7201----------------------------- INT 2F - SRDISK v2.02 - GET CODE/DATA SEGMENT AX = 7201h Return: AL = FFh if installed ES = segment of device driver header Program: SRDISK is a freeware resizeable RAMdisk by Marko Kohtala SeeAlso: AX=7200h --------!---Section--------------------------