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Interrupt List Release 26 (v91.3) Last change 6/15/91 This compilation is Copyright (c) 1989, 1990, 1991 Ralf Brown --------------------------------------------- Please redistribute the following files unmodified as a group, in a pair of archives named INTER26A and INTER26B (preferably the original authenticated PKZIP archives): INTERRUP.1ST the read-me file, containing credits, availability info INTERRUP.A INT 00 through INT 14 \ INTERRUP.B INT 15 through INT 1F \ total 599 pages at 60 lines INTERRUP.C INT 20 through INT 2E / per page, 648 with INTPRINT -p INTERRUP.D INT 2F through INT 5F / INTERRUP.E INT 60 through INT FF/ INTERRUP.PRI a brief introduction to interrupts INTPRINT.COM a simple formatter that also generates a list summary INTPRINT.DOC instructions for INTPRINT INTPRINT.C source code for INTPRINT MEMORY.LST format of the BIOS data area INT2QH.* program to convert list into QuickHelp database INT2GUID.* program to convert list into TurboPower GUIDE database --------------------------------------------- ******************************************************************************* ** If you have contributed to the interrupt list in the past, please send ** ** me your current email address if it differs from the one shown in ** ** INTERRUP.1ST. Also see the file REWARD. ** ******************************************************************************* If you notice any mistakes or omissions, please let me know! It is only with YOUR help that the list can continue to grow at the current rate. Please send all changes to me rather than distributing a modified version of the list. Please read the file INTERRUP.1ST before asking me any questions. You may find that they have already been addressed. Ralf Brown ARPA: ralf@cs.cmu.edu UUCP: {ucbvax,harvard}!cs.cmu.edu!ralf BIT: ralf%cs.cmu.edu@cmuccvma FIDO: Ralf Brown 1:129/26 or 1:129/53 or post a message to the DR_DEBUG echo CIS: >INTERNET:ralf@cs.cmu.edu I reply to all e-mail submissions and inquiries, but some of my replies bounce because of bad return paths. If you don't get a response from me within a reasonable period of time, send it again with a better return path (starting at harvard or ucbvax for UUCP, from the ARPA Internet for others). --------------------------------------------- See INTERRUP.1ST for the key to system abbreviations and a list of the trademarks mentioned here. --------------------------------------------- DISCLAIMER: THIS MATERIAL IS PROVIDED "AS IS". I verify the information contained in this list to the best of my ability, but I cannot be held responsible for any problems caused by use or misuse of the information, especially for those functions not officially documented. If it is marked "internal", you should check it carefully to make sure it works the same way in your version of the software (and please let me know whether or not it works the same way). Information marked with "???" is known to be incomplete or guesswork. --------------------------------------------- The use of -> instead of = signifies that the indicated register or register pair contains a pointer to the specified item, rather than the item itself ----------00--------------------------------- INT 00 - CPU-generated - DIVIDE ERROR Notes: generated if the divisor of a DIV or IDIV instruction is zero or the quotient overflows the result register; DX and AX will be unchanged. on an 8086/8088, the return address points to the following instruction on an 80286+, the return address points to the divide instruction SeeAlso: INT 04 ----------01--------------------------------- INT 01 - CPU-generated - SINGLE STEP Notes: generated after each instruction if TF (trap flag) is set; TF is cleared on invoking the single-step interrupt handler interrupts are prioritized such that external interrupts are invoked after the INT 01 pushes CS:IP/FLAGS and clears TF, but before the first instruction of the handler executes used by debuggers for single-instruction execution tracing, such as MSDOS DEBUG's T command SeeAlso: INT 03 ----------01--------------------------------- INT 01 - CPU-generated (80386+) - DEBUGGING EXCEPTIONS Instruction address breakpoint fault - will return to execute instruction Data address breakpoint trap - will return to following instruction General detect fault, debug registers in use Task-switch breakpoint trap SeeAlso: INT 03 ----------02--------------------------------- INT 02 - external hardware - NON-MASKABLE INTERRUPT Notes: generated by the CPU when the input to the NMI pin is asserted return address points to start of interrupted instruction on 80286+ although the Intel documentation states that this interrupt is typically used for power-failure procedures, it has many other uses on IBM-compatible machines: Memory parity error: all except Jr, CONV, and some machines without memory parity Breakout switch on hardware debuggers Coprocessor interrupt: all except Jr and CONV Keyboard interrupt: Jr, CONV I/O channel check: CONV, PS50+ Disk-controller power-on request: CONV System suspend: CONV Real-time clock: CONV System watch-dog timer, time-out interrupt: PS50+ DMA timer time-out interrupt: PS50+ ----------03--------------------------------- INT 03 - CPU-generated - BREAKPOINT Notes: generated by the one-byte breakpoint instruction (opcode CCh) used by debuggers to implement breakpoints, such as MSDOS DEBUG's G command also used by Turbo Pascal versions 1,2,3 when {$U+} specified return address points to byte following the breakpoint instruction SeeAlso: INT 01 ----------0309--SI4647----------------------- INT 03 - Soft-ICE BACK DOOR COMMANDS AH = 09h SI = 4647h ('FG') DI = 4A4Dh ('JM') AL = function 10h display string in Soft-ICE window DS:DX -> ASCIZ string to display (max 100 bytes, 0Dh OK) 11h execute Soft-ICE command DS:DX -> ASCIZ command string (max 100 bytes, 0Dh OK) 12h get breakpoint information Return: BH = entry number of last breakpoint set BL = type of last breakpoint set 00h BPM (breakpoint register types) 01h I/O 02h INTerrupt 03h BPX (INT 03h-style breakpoint) 04h reserved 05h range DH = entry number of last breakpoint to be triggered DL = type of last triggered breakpoint (see above) ----------04--------------------------------- INT 04 - CPU-generated - INTO DETECTED OVERFLOW Notes: the INTO instruction will generate this interrupt if OF (Overflow Flag) is set; otherwise, INTO is effectively a NOP may be used for convenient overflow testing (to prevent errors from propagating) instead of JO or a JNO/JMP combination SeeAlso: INT 00 ----------05--------------------------------- INT 05 - PRINT SCREEN Notes: normally invoked by the INT 09 handler when PrtSc key is pressed, but may be invoked directly by applications byte at 0050h:0000h contains status used by default handler 00h not active 01h PrtSc in progress FFh last PrtSc encountered error default handler is at F000h:FF54h in IBM PC and 100%-compatible BIOSes SeeAlso: INT 10/AH=12h/BL=20h ----------05--------------------------------- INT 05 - CPU-generated (80186+) - BOUND RANGE EXCEEDED Notes: generated by BOUND instruction when the value to be tested is less than the indicated lower bound or greater than the indicated upper bound. returning from this interrupt re-executes the failing BOUND instruction ----------06--------------------------------- INT 06 - CPU-generated (80286+) - INVALID OPCODE Notes: generated when the CPU attempts to execute an invalid opcode (most protected-mode instructions are considered invalid in real mode) generated on BOUND, LDS, LES, or LIDT instructions which specify a register rather than a memory address return address points to beginning of invalid instruction with proper programming, this interrupt may be used to emulate instructions which do not exist; many 386 BIOSes emulate the 80286 undocumented LOADALL instruction which was removed from the 80386+ SeeAlso: INT 0C"CPU",INT 0D"CPU" ----------07--------------------------------- INT 07 - CPU-generated (80286+) - PROCESSOR EXTENSION NOT AVAILABLE Notes: automatically called if a coprocessor instruction is encountered when no coprocessor is installed can be used to emulate a numeric coprocessor in software SeeAlso: INT 09"MATH UNIT PROTECTION" ----------08--------------------------------- INT 08 - IRQ0 - SYSTEM TIMER Notes: generated 18.2 times per second by channel 0 of the 8254 system timer, this interrupt is used to keep the time-of-day clock updated programs which need to be invoked regularly should use INT 1C unless they need to reprogram the timer while still keeping the time-of-day clock running at the proper rate default handler is at F000h:FEA5h in IBM PC and 100%-compatible BIOSes may be masked by setting bit 0 on I/O port 21h SeeAlso: INT 1C,INT 4A,INT 50"DESQview",INT 58"DoubleDOS",INT 70 ----------08--------------------------------- INT 08 - CPU-generated (80286+) - DOUBLE EXCEPTION DETECTED Notes: called when multiple exceptions occur on one instruction, or an exception occurs in an exception handler called in protected mode if an interrupt above the defined limit of the interrupt vector table occurs return address points at beginning of instruction with errors or the beginning of the instruction which was about to execute when the external interrupt caused the exception if an exception occurs in the double fault handler, the CPU goes into SHUTDOWN mode (which circuitry in the PC/AT converts to a reset); this "triple fault" is a faster way of returning to real mode on many 80286 machines than the standard keyboard controller reset ----------09--------------------------------- INT 09 - IRQ1 - KEYBOARD DATA READY Notes: generated when data is received from the keyboard. This is normally a scan code, but may also be an ACK or NAK of a command on AT-class keyboards. may be masked by setting bit 1 on I/O port 21h if the BIOS supports an enhanced (101/102-key) keyboard, it calls INT 15/AH=4Fh after reading the scan code from the keyboard and before further processing the interrupt handler performs the following actions for certain special keystrokes: Ctrl-Break invoke INT 1B, set flag at 0040h:0071h SysRq invoke INT 15/AH=85h Ctrl-Numlock place system in a tight wait loop Ctrl-Alt-Del jump to BIOS startup code (either F000h:FFF0h or the destination of the jump at that address) Shift-PrtSc invoke INT 05 SeeAlso: INT 05,INT 15/AH=4Fh,INT 15/AH=85h,INT 16,INT 1B,INT 51"DESQview" SeeAlso: INT 59"DoubleDOS" ----------09--------------------------------- INT 09 - CPU-generated (80286+) - PROCESSOR EXTENSION PROTECTION ERROR Notes: called if the coprocessor attempts to access memory outside a segment boundary; it may occur at an arbitrary time after the coprocessor instruction was issued until the condition is cleared or the coprocessor is reset, the only coprocessor instruction which may be used is FNINIT; WAIT or other coprocessor instructions will cause a deadlock because the coprocessor is still busy waiting for data SeeAlso: INT 07"CPU" ----------09--------------------------------- INT 09 - internal hardware - RESERVED BY Intel (80486 protected mode) Note: this exception has been moved to INT 0D SeeAlso: INT 09"MATH",INT 0D ----------0A--------------------------------- INT 0A - IRQ2 - LPT2 (PC), VERTICAL RETRACE INTERRUPT (EGA,VGA) Notes: the TOPS and PCnet adapters use this interrupt request line by default DOS 3.2 revectors IRQ2 to a stack-switching routine on ATs and above, the physical data line for IRQ2 is labeled IRQ9 and connects to the slave 8259. The BIOS redirects the interrupt for IRQ9 back here. under DESQview, only the INT 15h vector and BASIC segment address (the word at 0000h:0510h) may be assumed to be valid for the handler's process many VGA boards do not implement the vertical retrace interrupt, including the IBM VGA Adapter where the traces are either cut or removed SeeAlso: INT 52"DESQview",INT 5A"DoubleDOS",INT 71 ----------0A--------------------------------- INT 0A - IRQ2 - Tandy 1000-series HARD DISK Note: may be masked by setting bit 2 on I/O port 21h SeeAlso: INT 52"DESQview",INT 5A"DoubleDOS",INT 71 ----------0A--------------------------------- INT 0A - IRQ2 - ROLAND MPU MIDI INTERFACE Note: newer Roland cards and MIDI interfaces by other manufacturers use a jumper-selectable IRQ, but software and hardware generally defaults to IRQ2 SeeAlso: INT 52"DESQview",INT 5A"DoubleDOS",INT 71 ----------0A--------------------------------- INT 0A - CPU-generated (80286+ protected mode) - INVALID TASK STATE SEGMENT Notes: automatically called during a task switch if the new TSS specified by the task gate is invalid for any of the following reasons: TSS limit is less than 43 (80286) or 103 (80386/80486) LDT selector invalid or segment not present null SS selector, or SS selector outside LDT/GDT limit stack segment is read-only stack segment DPL differs from new CPL, or RPL <> CPL CS selector is outside LDT/GDT limit or not code non-conforming code segment's DPL differs from CPL conforming code segment's DPL > CPL DS/ES selectors outside LDT/GDT limit or not readable segments the handler must use a task gate in order to have a valid TSS under which to execute; it must also reset the busy bit in the new TSS SeeAlso: INT 0B"CPU" ----------0B--------------------------------- INT 0B - IRQ3 - SERIAL COMMUNICATIONS (COM2) Notes: the TOPS and PCnet adapters use this interrupt request line as an alternate on PS/2's, COM2 through COM8 share this interrupt; on many PC's, COM4 shares this interrupt may be masked by setting bit 3 on I/O port 21h SeeAlso: INT 0C"COM1",INT 53"DESQview",INT 5B"DoubleDOS" ----------0B--------------------------------- INT 0B - CPU-generated (80286+ protected mode) - SEGMENT NOT PRESENT Notes: generated when loading a segment register if the segment descriptor indicates that the segment is not currently in memory, unless the segment is an LDT (see INT 0A"CPU") or stack segment (see INT 0C"CPU") needed by a task switch may be used to implement virtual memory by loading in segments as they are accessed, clearing the "not present" bit after loading SeeAlso: INT 0A"CPU",INT 0E"hardware" ----------0C--------------------------------- INT 0C - IRQ4 - SERIAL COMMUNICATIONS (COM1) Notes: on many PC's, COM3 shares this interrupt may be masked by setting bit 4 on I/O port 21h SeeAlso: INT 0B"COM2",INT 54"DESQview",INT 5C"DoubleDOS" ----------0C--------------------------------- INT 0C - CPU-generated (80286+) - STACK FAULT Notes: generated on stack overflow/underflow in protected mode generated in protected mode if an inter-level transition or task switch references a stack segment marked "not present" generated on accessing a word operand at SS:FFFFh in real mode the 80286 will shut down in real mode if SP=1 before a push. On the PC AT and compatibles, external circuitry generates a reset on shutdown. SeeAlso: INT 0B"CPU",INT 0D"CPU" ----------0C--------------------------------- INT 0C - IBM SYSTEM 36/38 WORKSTATION EMULATION - API POINTER Call offset 100h in the interrupt handler's segment with AH = function 03h update screen 05h select next session AL = session number (00h-03h) Return: AL = session type code 00h not active 01h display session 02h printer session FEh invalid session number DS = requested session's data segment (0 if not active) Return: ??? Format of emulator's data area (offset from interrupt handler's segment): Offset Size Description 13Eh BYTE bit flags for status line indicators turned on since this byte last zerod 13Fh BYTE bit flags for status line indicators turned off since this byte last set to FFh 140h WORD offset of EBCDIC to ASCII translation 146h WORD offset of EBCDIC screen buffer 148h WORD offset of EC (engineering change) level signature 150h BYTE "KEYI" 151h BYTE 5250 key scan code to be sent to remote 15Bh BYTE "SYSAV" 15Dh BYTE 5250 cursor column 15Eh BYTE 5250 cursor row 167h BYTE "DVCTAD" 178h BYTE "FLAGS" 184h BYTE "SESSNOAD" 193h BYTE "STNAD" 198h BYTE "NSDS" ----------0D--------------------------------- INT 0D - IRQ5 - FIXED DISK (PC,XT), LPT2 (AT), reserved (PS/2) Notes: under DESQview, only the INT 15h vector and BASIC segment address (the word at 0000h:0510h) may be assumed to be valid for the handler's process may be masked by setting bit 5 on I/O port 21h SeeAlso: INT 0E"IRQ6",INT 0F"IRQ7",INT 55"DESQview",INT 5D"DoubleDOS" ----------0D--------------------------------- INT 0D - IRQ5 - Tandy 1000 60 Hz RAM REFRESH SeeAlso: INT 55 ----------0D--------------------------------- INT 0D - CPU-generated (80286+) - GENERAL PROTECTION VIOLATION Notes: called in real mode when an instruction accesses a word operand located at offset FFFFh in segment CS, DS, ES, FG, or GS a PUSH MEM or POP MEM instruction contains an invalid bit encoding in the second byte an instruction exceeds the maximum length allowed (10 bytes for 80286, 15 bytes for 80386/80486) an instruction wraps from offset FFFFh to offset 0000h called in protected mode on protection violations not covered by INT 06 through INT 0C, including segment limit violations write to read-only segments accesses using null DS or ES selectors accesses to segments with privilege greater than CPL wrong descriptor type called on 80486 protected-mode floating-point protection fault SeeAlso: INT 09"80486",INT 0C"STACK" ----------0E--------------------------------- INT 0E - IRQ6 - DISKETTE CONTROLLER Notes: generated by floppy disk controller on completion of an operation default handler is at F000h:EF57h in IBM PC and 100%-compatible BIOSes may be masked by setting bit 6 on I/O port 21h SeeAlso: INT 0D"IRQ5",INT 56"DESQview",INT 5E"DoubleDOS" ----------0E--------------------------------- INT 0E - CPU-generated (80386+ native mode) - PAGE FAULT Note: used to implement virtual memory SeeAlso: INT 0B"hardware" ----------0F--------------------------------- INT 0F - IRQ7 - PARALLEL PRINTER Notes: generated by the LPT1 printer adapter when printer becomes ready most printer adapters do not reliably generate this interrupt the 8259 interrupt controller generates an interrupt corresponding to IRQ7 when an error condition occurs SeeAlso: INT 0D"LPT2",INT 57"DESQview",INT 5F"DoubleDOS" ----------10--------------------------------- INT 10 - CPU-generated (80286+) - COPROCESSOR ERROR Notes: generated by the CPU when the -ERROR pin is asserted by the coprocessor AT's and clones usually wire the coprocessor to use IRQ13, but not all get it right SeeAlso: INT 09"hardware",INT 75 ----------1000------------------------------- INT 10 - VIDEO - SET VIDEO MODE AH = 00h AL = mode (see below) Return: AL = video mode flag (Phoenix BIOS) 20h mode > 7 30h modes <= 7 except mode 6 3Fh mode 6 AL = CRT controller mode byte (Phoenix 386 BIOS v1.10) Notes: IBM standard modes do not clear the screen if the high bit of AL is set (EGA or higher only) the Tseng ET4000 chipset is used by the Orchid Prodesigner II, Diamond SpeedSTAR VGA, Groundhog Graphics Shadow VGA SeeAlso: AX=0070h,AX=007Eh,AX=10F0h,AX=6F05h,AH=FFh"GO32" Values for video mode: text/ text pixel pixel colors disply scrn system grph resol box resoltn pages addr 00h = T 40x25 8x8 16gray 8 B800 CGA,PCjr = T 40x25 8x14 16gray 8 B800 EGA = T 40x25 8x16 16 8 B800 MCGA = T 40x25 9x16 16 8 B800 VGA 01h = T 40x25 8x8 16 8 B800 CGA,PCjr = T 40x25 8x14 16 8 B800 EGA = T 40x25 8x16 16 8 B800 MCGA = T 40x25 9x16 16 8 B800 VGA 02h = T 80x25 8x8 16gray 4 B800 CGA,PCjr = T 80x25 8x14 16gray 4 B800 EGA = T 80x25 8x16 16 4 B800 MCGA = T 80x25 9x16 16 4 B800 VGA 03h = T 80x25 8x8 16 4 B800 CGA,PCjr = T 80x25 8x14 16 4 B800 EGA = T 80x25 8x16 16 4 B800 MCGA = T 80x25 9x16 16 4 B800 VGA 04h = G 40x25 8x8 320x200 4 B800 CGA,PCjr,EGA,MCGA,VGA 05h = G 40x25 8x8 320x200 4gray B800 CGA,PCjr,EGA = G 40x25 8x8 320x200 4 B800 MCGA,VGA 06h = G 80x25 8x8 640x200 2 B800 CGA,PCjr,EGA,MCGA,VGA 07h = T 80x25 9x14 mono var B000 MDA,Hercules,EGA = T 80x25 9x16 mono B000 VGA 08h = G 20x25 8x8 160x200 16 PCjr = T 132x25 8x8 16 B800 ATI EGA/VGA Wonder ** = T 132x25 8x8 mono B000 ATI EGA/VGA Wonder ** = G 90x43 8x8 720x352 mono B000 Hercules + MSHERC.COM 09h = G 40x25 8x8 320x200 16 PCjr 0Ah = G 80x25 8x8 640x200 4 PCjr 0Bh = reserved (used internally by EGA BIOS) 0Ch = reserved (used internally by EGA BIOS) 0Dh = G 40x25 8x8 320x200 16 8 A000 EGA,VGA 0Eh = G 80x25 8x8 640x200 16 4 A000 EGA,VGA 0Fh = G 80x25 8x14 640x350 mono 2 A000 EGA,VGA 10h = G 80x25 8x14 640x350 4 2 A000 64k EGA = G 640x350 16 A000 256k EGA,VGA 11h = G 80x30 8x16 640x480 mono A000 VGA,MCGA,ATI EGA,ATI VIP 12h = G 80x30 8x16 640x480 16/256k A000 VGA,ATI VIP = G 80x30 8x16 640x480 16/64 A000 ATI EGA Wonder = G 640x480 16 UltraVision+256K EGA 13h = G 40x25 8x8 320x200 256/256k A000 VGA,MCGA,ATI VIP 14h = G 80x25 8x8 640x200 Lava Chrome II EGA = G 640x400 16 Tecmar VGA/AD 15h = G 80x25 8x14 640x350 Lava Chrome II EGA 16h = G 80x25 8x14 640x350 Lava Chrome II EGA = G 800x600 16 Tecmar VGA/AD 17h = G 80x34 8x14 640x480 Lava Chrome II EGA = T 132x25 Tecmar VGA/AD 18h = T 132x44 8x8 mono Tseng Labs EVA = T 132x44 8x8 16/256 2 B000 Tseng ET4000 chipset = G 80x34 8x14 640x480 Lava Chrome II EGA = G 1024x768 16 Tecmar VGA/AD 19h = T 132x25 8x14 mono Tseng Labs EVA = T 132x25 8x14 16/256 4 B000 Tseng ET4000 chipset 1Ah = T 132x28 8x13 mono Tseng Labs EVA = T 132x28 8x13 16/256 4 B000 Tseng ET4000 chipset = G 640x350 256 Tecmar VGA/AD 1Bh = G 640x400 256 Tecmar VGA/AD 1Ch = G 640x480 256 Tecmar VGA/AD 1Dh = G 800x600 256 Tecmar VGA/AD 21h = G 80x43 8x8 720x348 mono B000 DESQview 2.x+Hercules *** 22h = T 132x44 8x8 Tseng Labs EVA = T 132x44 8x8 16/256 2 B800 Tseng ET4000 chipset = T 132x44 8x8 Ahead Systems EGA2001 = T 132x44 8x8 16 2 B800 Ahead B = T 132x44 16 Orchid Prodesigner VGA = T 132x43 Allstar Peacock (VGA) = G 80x43 8x8 720x348 mono B800 DESQview 2.x+Hercules *** 23h = T 132x25 6x14 Tseng Labs EVA = T 132x25 8x14 16/256 4 B800 Tseng ET4000 chipset = T 132x25 8x14 Ahead Systems EGA2001 = T 132x25 8x14 16 4 B800 Ahead B = T 132x25 8x8 16 B800 ATI EGA Wonder,ATI VIP = T 132x28 Allstar Peacock (VGA) = T 132x28 16 Orchid Prodesigner VGA 24h = T 132x28 6x13 Tseng Labs EVA = T 132x28 8x13 16/256 4 B800 Tseng ET4000 chipset = T 132x28 8x12 16 1 B800 Ahead B = T 132x25 Allstar Peacock (VGA) = T 132x25 16 Orchid Prodesigner VGA 25h = G 80x60 8x8 640x480 Tseng Labs EVA = G 80x60 8x8 640x480 16/256 1 A000 Tseng ET4000 chipset = G 640x480 16 VEGA VGA = G 80x60 8x8 640x480 16 A000 Orchid Prodesigner VGA = G 80x60 8x8 640x480 16 1 A000 Ahead B (same as 26h) 26h = T 80x60 8x8 Tseng Labs EVA = T 80x60 8x8 16/256 2 B800 Tseng ET4000 chipset = G 80x60 8x8 640x480 Ahead Systems EGA2001 = G 80x60 8x8 640x480 16 1 A000 Ahead B (same as 25h) = T 80x60 Allstar Peacock (VGA) = T 80x60 16 Orchid ProDesigner VGA 27h = G 720x512 16 VEGA VGA = G 720x512 16 Genoa = T 132x25 8x8 mono B000 ATI EGA Wonder,ATI VIP 28h = T ???x??? VEGA VGA 29h = G 800x600 16 VEGA VGA = G 100x37 8x16 800x600 16 A000 Orchid = G 800x600 16 A000 STB,Genoa,Sigma = G 800x600 16 Allstar Peacock (VGA) = G 100x37 8x16 800x600 16/256 1 A000 Tseng ET4000 chipset 2Ah = T 100x40 Allstar Peacock (VGA) = T 100x40 8x16 16 Orchid Prodesigner VGA = T 100x40 8x15 16/256 4 B800 Tseng ET4000 chipset 2Dh = G 640x350 256 VEGA VGA = G 640x350 256/256k A000 Orchid, Genoa, STB = G 80x25 8x14 640x350 256/256k 1 A000 Tseng ET4000 chipset 2Eh = G 640x480 256 VEGA VGA = G 80x30 8x16 640x480 256/256k A000 Orchid = G 640x480 256/256k A000 STB,Genoa,Sigma = G 80x30 8x16 640x480 256/256k 1 A000 Tseng ET4000 chipset 2Fh = G 720x512 256 VEGA VGA = G 720x512 256 Genoa = G 80x25 8x16 640x400 256/256k 1 A000 Tseng ET4000 chipset = T 160x50 8x8 1280x400 16 4 B800 Ahead B (Wizard/3270) 30h = G 800x600 256 VEGA VGA = G 100x37 8x16 800x600 256/256k A000 Orchid = G 800x600 256/256k A000 STB,Genoa,Sigma = G 720x350 2 3270 PC = G 800x600 256 Cardinal = G ???x??? B800 AT&T 6300 = G 100x37 8x16 800x600 256/256k 1 A000 Tseng ET4000 chipset 32h = T 80x34 8x10 16 4 B800 Ahead B (Wizard/3270) 33h = T 132x44 8x8 16 B800 ATI EGA Wonder,ATI VIP = T 80x34 8x8 16 4 B800 Ahead B (Wizard/3270) 34h = T 80x66 8x8 16 4 B800 Ahead B (Wizard/3270) 36h = G 960x720 16 VEGA VGA = G 960x720 16 STB 37h = G 1024x768 16 VEGA VGA = G 128x48 8x16 1024x768 16 A000 Orchid = G 1024x768 16 A000 STB,Genoa,Sigma = T 132x44 8x8 mono B800 ATI EGA Wonder,ATI VIP 38h = G 1024x768 256 STB VGA/EM-16 Plus (1MB) = G 128x48 8x16 1024x768 256/256k 1 A000 Tseng ET4000 chipset 40h = G 80x25 8x16 640x400 2 1 B800 AT&T 6300, AT&T VDC600 = G 80x25 8x16 640x400 2 1 B800 Compaq Portable = T 80x43 VEGA VGA, Tecmar VGA/AD = T 80x43 Video7 V-RAM VGA = T 80x43 Tatung VGA 41h = G 640x200 16 1 AT&T 6300 = T 132x25 VEGA VGA = T 132x25 Tatung VGA = T 132x25 Video7 V-RAM VGA 42h = G 80x25 8x16 640x400 16 AT&T 6300, AT&T VDC600 = T 132x43 VEGA VGA = T 132x43 Tatung VGA = T 132x43 Video7 V-RAM VGA = T 80x34 9x10 4 4 B800 Ahead B (Wizard/3270) 43h = G 640x200 of 640x400 viewport AT&T 6300 (unsupported) = T 80x60 VEGA VGA = T 80x60 Tatung VGA = T 80x60 Video7 V-RAM VGA = T 80x45 9x8 4 4 B800 Ahead B (Wizard/3270) 44h = disable VDC and DEB output AT&T 6300 = T 100x60 VEGA VGA = T 100x60 Tatung VGA = T 100x60 Video7 V-RAM VGA 45h = T 132x28 Tatung VGA = T 132x28 Video7 V-RAM VGA 46h = G 100x40 8x15 800x600 2 AT&T VDC600 47h = G 100x37 8x16 800x600 16 AT&T VDC600 48h = G 80x50 8x8 640x400 2 B800 AT&T 6300, AT&T VDC600 49h = G 80x30 8x16 640x480 Lava Chrome II EGA 4Dh = T 120x25 VEGA VGA 4Eh = T 120x43 VEGA VGA 4Fh = T 132x25 VEGA VGA 50h = G 80x30 8x16 640x480 16 Paradise EGA-480 = T 80x30 8x16 16/256k B800 Trident TVGA 8800/8900 = T 80x34 Lava Chrome II EGA = T 80x43 mono VEGA VGA = G 640x480 mono??? Taxan 565 EGA = T 132x25 9x14 mono Ahead Systems EGA2001 = T 132x25 9x14 4 4 B800 Ahead B = T 132x25 8x14 16 8 B800 OAK Technologies VGA-16 51h = T 80x30 8x16 Paradise EGA-480 = T 80x30 Lava Chrome II EGA = G 80x34 8x14 640x480 16 ATI EGA Wonder = T 80x43 8x11 16/256k B800 Trident TVGA 8800/8900 = T 132x25 mono VEGA VGA = T 132x43 8x8 16 5 B800 OAK Technologies VGA-16 = T 132x28 9x12 4 4 B800 Ahead B 52h = T 80x60 Lava Chrome II EGA = T 80x60 8x8 16/256k B800 Trident TVGA 8800/8900 = G 94x29 8x14 752x410 16 ATI EGA Wonder = G 100x75 8x8 800x600 16 1 A000 OAK Technologies VGA-16 = T 132x43 mono VEGA VGA = T 132x44 9x8 mono Ahead Systems EGA2001 = T 132x44 9x8 4 2 B800 Ahead B 53h = G 100x40 8x14 800x560 16 ATI EGA Wonder,ATI VIP = T 132x25 8x14 16/256k B800 Trident TVGA 8800/8900 = T 132x43 Lava Chrome II EGA 54h = G 100x42 8x14 800x600 16 A000 ATI EGA Wonder, VGA Wondr = T 132x25 Lava Chrome II EGA = T 132x30 8x16 16/256k B800 Trident TVGA 8800/8900 = T 132x43 8x8 Paradise EGA-480 = T 132x43 7x9 16/256k B800 Paradise VGA = T 132x43 8x9 16/256k B800 Paradise VGA on multisync = T 132x43 Taxan 565 EGA = T 132x43 AST VGA Plus = T 132x43 Hewlett-Packard D1180A = T 132x43 7x9 16 AT&T VDC600 55h = T 80x66 8x8 16/256k A000 ATI VIP = T 132x25 8x14 Paradise EGA-480 = T 132x25 7x16 16/256k B800 Paradise VGA = T 132x25 8x16 16/256k B800 Paradise VGA on multisync = T 132x25 Taxan 565 EGA = T 132x25 AST VGA Plus = T 132x25 Hewlett-Packard D1180A = T 132x25 7x16 16 AT&T VDC600 = T 132x43 8x11 16/256k B800 Trident TVGA 8800/8900 = G 94x29 8x14 752x410 Lava Chrome II EGA = G 128x48 8x16 1024x768 16/256k A000 ATI VGA Wonder v4+ *! 56h = T 132x43 8x8 3??? 2 B000 NSI Smart EGA+ = T 132x43 7x9 4 B000 Paradise VGA = T 132x43 8x9 4 B000 Paradise VGA on multisync = T 132x43 mono Taxan 565 EGA = T 132x43 7x9 2 AT&T VDC600 = T 132x60 8x8 16/256k B800 Trident TVGA 8800/8900 57h = T 132x25 8x14 3??? 4 B000 NSI Smart EGA+ = T 132x25 7x16 4 B000 Paradise VGA = T 132x25 8x16 4 B000 Paradise VGA on multisync = T 132x25 mono Taxan 565 EGA = T 132x25 7x16 2 AT&T VDC600 = T 132x25 9x14 16/256k B800 Trident TVGA 8800/8900 58h = G 100x75 8x8 800x600 16/256k A000 Paradise VGA = G 100x75 8x8 800x600 16 AT&T VDC600 = T 80x33 8x14 16 B800 ATI EGA Wonder,ATI VIP = G 800x600 16 AST VGA Plus, Compaq VGA = G 800x600 16 Dell VGA = G 800x600 16 Hewlett-Packard D1180A = T 132x30 9x16 16/256k B800 Trident TVGA 8800/8900 59h = G 100x75 8x8 800x600 2 A000 Paradise VGA = G 100x75 8x8 800x600 2 AT&T VDC600 = T 80x66 8x8 16/256k A000 ATI VIP = G 800x600 2 AST VGA Plus, Compaq VGA = G 800x600 2 Dell VGA = G 800x600 2 Hewlett-Packard D1180A = T 132x43 9x11 16/256k B800 Trident TVGA 8800/8900 5Ah = T 132x60 9x8 16/256k B800 Trident TVGA 8800/8900 5Bh = G 800x600 16 Maxxon, SEFCO TVGA, Imtec = G 640x350 256 Genoa 6400 = T 80x30 8x16 B800 ATI VGA Wonder (undoc) = G 100x75 8x8 800x600 16/256k A000 Trident TVGA 8800, 8900 5Ch = G 640x400 256 Logix, ATI Prism Elite = G 640x400 256 Maxxon, SEFCO TVGA, Imtec = G 80x25 8x16 640x400 256/256k A000 Zymos Poach = G 80x25 8x16 640x400 256/256k A000 Trident TVGA 8800/8900 = G 640x480 256 Genoa 6400 5Dh = G 640x480 256 Logix, ATI Prism Elite = G 640x480 256 Maxxon, SEFCO TVGA, Imtec = G 80x30 8x16 640x480 256/256k A000 Zymos Poach = G 80x30 8x16 640x480 256/256k A000 Trident TVGA 8800 (512K) 5Eh = G 640x400 256 Paradise VGA,VEGA VGA = G 640x400 256 AST VGA Plus = G 640x400 256 Compaq VGA, Dell VGA = G 80x25 8x16 640x400 256 AT&T VDC600 = G 800x600 16 Logix, ATI Prism Elite = G 800x600 256 Genoa 6400 = G 100x75 8x8 800x600 256/256k A000 Zymos Poach, Trident 8900 5Fh = G 640x480 256 Paradise VGA = G 640x480 256 AST VGA Plus = G 640x480 256 Compaq VGA, Dell VGA = G 640x480 256 Hewlett-Packard D1180A = G 80x30 8x16 640x480 256 AT&T VDC600 (512K) = G 1024x768 16 Logix, ATI Prism Elite = G 1024x768 16 Maxxon, Genoa 6400, Imtec = G 128x48 8x16 1024x768 16/256k A000 Zymos Poach = G 128x48 8x16 1024x768 16/256k A000 Trident TVGA 88/8900 512K 60h = G 80x??? ???x400 Corona/Cordata BIOS 4.10+ = G 752x410 VEGA VGA = G 752x410 16 Tatung VGA = G 752x410 16 Video7 V-RAM VGA = G 80x25 8x16 640x400 256 1 A000 Ahead B = G 128x48 8x16 1024x768 4/256k A000 Trident TVGA 8900 = T 132x25 8x14 16/64 8 B800 Quadram Ultra VGA 61h = G ???x400 Corona/Cordata BIOS 4.10+ = G 720x540 VEGA VGA = G 720x540 16 Tatung VGA = G 720x540 16 Video7 V-RAM VGA = G 80x25 8x16 640x400 256 A000 ATI VGA Wonder = G 80x30 8x16 640x480 256 1 A000 Ahead B (512K) = G 96x64 8x16 768x1024 16/256k A000 Trident TVGA 88/8900 512K = T 132x29 8x12 16/64 8 B800 Quadram Ultra VGA 62h = G 800x600 VEGA VGA = G 800x600 16 Tatung VGA = G 800x600 16 Video7 V-RAM VGA = G 80x30 8x16 640x480 256 A000 ATI VGA Wonder = G 100x75 8x8 800x600 256 1 A000 Ahead B (512K) = G 128x48 8x16 1024x768 256/256k A000 Trident TVGA 8900, Zymos = T 132x32 8x11 16/64 6 B800 Quadram Ultra VGA 63h = G 1024x768 2 Video7 V-RAM VGA = G 100x42 8x14 800x600 256 A000 ATI VGA Wonder = G 128x48 7x16 1024x768 256 1 A000 Ahead B (1MB) = T 132x44 8x8 16/64 5 B800 Quadram Ultra VGA 64h = G 1024x768 4 Video7 V-RAM VGA = G 128x48 8x16 1024x768 256 A000 ATI VGA Wonder Plus 65h = G 1024x768 16 Video7 V-RAM VGA = G 128x48 8x16 1024x768 16 A000 ATI VGA Wonder 66h = G 640x400 256 Tatung VGA = G 640x400 256 Video7 V-RAM VGA 67h = G 640x480 256 Video7 V-RAM VGA = G 128x48 8x16 1024x768 4 A000 ATI VGA Wonder 69h = G 720x540 256 Video7 V-RAM VGA 6Ah = G 800x600 16 A000 VESA standard interface = G 800x600 16 Genoa 6400 = G 100x75 8x8 800x600 16 1 A000 Ahead B (VESA) (see 71h) = G 800x600 16 Zymos Poach = G 800x600 16 Epson LT-386SX in CRT Mode = G 800x600 16 Compuadd 316SL in CRT Mode = G 100x42 8x14 800x600 A000 ATI VGA Wonder (undoc) 70h = G 800x600 16 Cardinal, C&T chipset = G 90x28 8x14 720x392 16 1 A000 Ahead B = T 40x25 8x8 16 8 B800 Quadram (CGA double scan) = extended mode set (see AX=0070h) Everex Micro Enhancer EGA 71h = G 100x35 8x16 800x600 16of64 A000 NSI Smart EGA+ = G 960x720 16 Cardinal = G 100x75 8x8 800x600 16 1 A000 Ahead B (same as 6Ah) = T 80x25 8x8 16 8 B800 Quadram (CGA double scan) 72h = G 1024x768 16 Cardinal, C&T chipset = T 80x60 8x8 16 B800 Quadram Ultra VGA 73h = G 80x60 8x8 640x480 16??? A000 Quadram Ultra VGA 74h = G 640x400 2 B800 Toshiba 3100 AT&T mode = G 128x48 8x16 1024x768 16 1 A000 Ahead B (512K) = T 80x66 8x8 16 B800 Quadram Ultra VGA 75h = G 128x48 8x16 1024x768 4 1 A000 Ahead B = G 80x66 640x528 16??? A000 Quadram Ultra VGA 76h = G 128x48 8x16 1024x768 2 1 A000 Ahead B = T 94x29 8x14 16 B800 Quadram Ultra VGA 77h = G 94x29 752x410 16??? A000 Quadram Ultra VGA 78h = G 640x400 256 STB VGA/EM-16 Plus = G 640x400 256 Cardinal, C&T chipset = T 100x75 8x8 16 B800 Quadram Ultra VGA 79h = G 640x480 256 Cardinal, C&T chipset = G 100x75 800x600 16??? A000 Quadram Ultra VGA 7Ah = G 720x540 256 Cardinal = T 114x60 8x8 16 B800 Quadram Ultra VGA 7Bh = G 800x600 256 Cardinal = G 114x60 912x480 16??? A000 Quadram Ultra VGA 7Ch = G 512x512 16 Genoa 7Dh = G 512x512 256 Genoa 7Eh = special mode set (see AX=007Eh) Paradise VGA, AT&T VDC600 7Fh = special function set (see AX=007Fh) Paradise VGA, AT&T VDC600 82h = T 80x25 B&W AT&T VDC overlay mode * 83h = T 80x25 AT&T VDC overlay mode * 86h = G 640x200 B&W AT&T VDC overlay mode * 88h = G 90x43 8x8 720x352 mono B000 Hercules + MSHERC.COM C0h = G 640x400 2/prog pallet AT&T VDC overlay mode * C4h = disable output AT&T VDC overlay mode * D0h = G 640x400 2 B800 DEC VAXmate AT&T mode * for AT&T VDC overlay modes, BL contains the DEB mode, which may be 06h, 40h, or 44h ** for ATI EGA Wonder, mode 08h is only valid if SMS.COM is loaded resident. SMS maps mode 08h to mode 27h if the byte at location 0040:0063 is 0B4h, otherwise to mode 23h, thus selecting the appropriate (monochrome or color) 132x25 character mode. for ATI VGA Wonder, mode 08h is the same, and only valid if VCONFIG loaded resident *** DESQview intercepts calls to change into these two modes (21h is page 0, 22h is page 1) even if there is no Hercules graphics board installed *! ATI BIOS v4-1.00 has a text-scrolling bug in this mode ----------100070----------------------------- INT 10 - VIDEO - Everex Micro Enhancer EGA/Viewpoint VGA - EXTENDED MODE SET AX = 0070h BL = mode (see below) SeeAlso: AH=00h,AX=6F05h,AX=7000h/BX=0004h,AH=FFh"GO32" Values for video mode: text/ text pixel pixel colors disp scrn monitor adapter grph resol box resoltn page addr 00h = G 640x480 16 multsync EGA,VGA 01h = G 752x410 16 multsync EGA,VGA 02h = G 800x600 16 multsync EGA,VGA 03h = T 80x34 multsync EGA,VGA 04h = T 80x60 multsync EGA,VGA 05h = T 94x29 multsync EGA only 06h = T 94x51 multsync EGA only 07h = T 100x43 8x14 16 VGA only 08h = T 100x75 8x8 16 VGA only 09h = T 80x44 EGA EGA only 0Ah = T 132x25 EGA EGA,VGA 0Bh = T 132x44 EGA EGA,VGA 0Ch = T 132x25 CGA EGA only 0Dh = T 80x44 mono EGA only 0Eh = T 132x25 mono 0Fh = T 132x44 mono 10h = reserved 11h = G 1280x350 4 EGA only 12h = G 1280x600 4 EGA only 13h = G 640x350 256 EGA only 14h = G 640x400 256 15h = G 512x480 256 16h = T 80x30 8x16 256 VGA only 18h = T 100x27 8x16 16 VGA only 20h = G 1024x768 16 Everex 629,678 21h = T 160x64 8x16 1280x1024 16 1MB VGA only 30h = G 640x480 256 Everex 629,678 31h = G 800x600 256 Everex 629,678 32h = G 128x48 8x16 1024x768 256 1MB VGA only 40h = T 132x30 8x16 16 VGA only 50h = T 132x32 8x16 mono VGA only 62h = G 40x25 8x8 320x200 32K Vwpt TC (EV629) 70h = G 64x30 8x16 512x480 32K Viewpoint TC 71h = G 80x30 8x16 640x480 32K Viewpoint TC 76h = G 64x30 8x16 512x480 16M Viewpoint TC 77h = G 80x30 8x16 640x480 16M Viewpoint TC ----------10007E----------------------------- INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - SET SPECIAL MODE AX = 007Eh BX = horizontal dimension of the mode desired CX = vertical dimension of the mode desired (both BX/CX in pixels for graphics modes, rows for alpha modes) DX = number of colors of the mode desired (0000h for monochrome modes) Return: BH = 7Eh if successful (Paradise VGA) AL = 7Eh if successful (AT&T VDC600) SeeAlso: AH=00h,AX=0070h,AX=007Fh,AX=6F05h,AH=FFh"GO32" ----------10007F----------------------------- INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - EXTENDED FUNCTIONS AX = 007Fh BH = function 00h set VGA operation 01h set non-VGA operation color modes (0,1,2,3,4,5,6) will set non-VGA CGA operation monochrome mode 7 will set non-VGA MDA/Hercules operation 02h query mode status Return: BL = 00h if operating in VGA mode, 01h if non-VGA mode CH = total video RAM size in 64k byte units CL = video RAM used by the current mode 03h lock current mode allows current mode (VGA or non-VGA) to survive re-boot 04h enter CGA mode (AT&T VDC600 only) 05h enter MDA mode (AT&T VDC600 only) 0Ah,0Bh,0Ch,0Dh,0Eh,0Fh WRITE PARADISE REGISTERS 0,1,2,3,4,5 (port 03CEh indices 0Ah,0Bh,0Ch,0Dh,0Eh,0Fh) BL = value to set in the paradise register 1Ah,1Bh,1Ch,1Dh,1Eh,1Fh READ PARADISE REGISTERS 0,1,2,3,4,5 (port 03CEh indices 0Ah,0Bh,0Ch,0Dh,0Eh,0Fh) Return: BL = value of the paradise register BH = 7Fh if successful Return: AL = 7Fh if successful (AT&T VDC600) SeeAlso: AX=007Eh ----------1001------------------------------- INT 10 - VIDEO - SET TEXT-MODE CURSOR SHAPE AH = 01h CH = bit 7 should be zero bits 6,5 cursor blink (00=normal, 01=invisible, 10=erratic, 11=slow) (00=normal, other=invisible on EGA/VGA) bits 4-0 top scan line containing cursor CL = bottom scan line containing cursor (bits 0-4) Notes: buggy on EGA systems--BIOS remaps cursor shape in 43 line modes, but returns unmapped cursor shape UltraVision scales size to the current font height by assuming 14-line monochrome and 8-line color fonts; this call is not valid if cursor emulation has been disabled applications which wish to change the cursor by programming the hardware directly on EGA or abovve should call INT 10/AX=1130h or read 0040h:0085h first to determine the current font height BUG: AMI 386 BIOS and AST Premier 386 BIOS will lock up the system if AL is not equal to the current video mode SeeAlso: AH=03h,AX=CD05h ----------1002------------------------------- INT 10 - VIDEO - SET CURSOR POSITION AH = 02h BH = page number 0-3 in modes 2&3 0-7 in modes 0&1 0 in graphics modes DH = row (00h is top) DL = column (00h is left) SeeAlso: AH=03h,AH=05h ----------1003------------------------------- INT 10 - VIDEO - GET CURSOR POSITION AND SIZE AH = 03h BH = page number 0-3 in modes 2&3 0-7 in modes 0&1 0 in graphics modes Return: AX = 0000h (Phoenix BIOS) CH = start scan line CL = end scan line DH = row (00h is top) DL = column (00h is left) Notes: a separate cursor is maintained for each of up to 8 display pages many ROM BIOSes incorrectly return the default size for a color display (start 06h, end 07h) when a monochrome display is attached SeeAlso: AH=01h,AH=02h ----------1004------------------------------- INT 10 - VIDEO - READ LIGHT PEN POSITION (except VGA) AH = 04h Return: AH = light pen trigger flag 00h not down/triggered 01h down/triggered DH,DL = row,column of character light pen is on CH = pixel row (graphics modes 04h-06h) CX = pixel row (graphics modes with >200 rows) BX = pixel column Notes: on a CGA, returned column numbers are always multiples of 2 (320- column modes) or 4 (640-column modes) returned row numbers are only accurate to two lines ----------1005------------------------------- INT 10 - VIDEO - SELECT ACTIVE DISPLAY PAGE AH = 05h AL = new page number (00h to number of pages - 1) (see AH=00h) SeeAlso: AH=0Fh ----------1005------------------------------- INT 10 - VIDEO - MANIPULATE CRT/CPU PAGE REGISTERS (PCjr) AH = 05h AL = subfunction 80h read CRT and CPU page registers Return: BH = CRT page register BL = CPU page register 81h set CPU page register BL = CPU page 82h set CRT page register BH = CRT page 83h set both CPU and CRT page registers BL = CPU page BH = CRT page Notes: the CPU page determines which 16K block of the first 128K of physical memory will be mapped at B800h by the hardware the CRT page determines the start address of the memory used by the video controller ----------1005------------------------------- INT 10 - VIDEO - GRAPHICS BITMAP BUFFER (Corona/Cordata BIOS v4.10+) AH = 05h AL = 00h set address of graphics bitmap buffer (video modes 60h,61h) BX = segment of buffer 0Fh get address of graphics bitmap buffer (video modes 60h,61h) Return: DX = segment of graphics bitmap buffer ----------1006------------------------------- INT 10 - VIDEO - SCROLL UP WINDOW AH = 06h AL = number of lines by which to scroll up (00h = clear entire window) BH = attribute used to write blank lines at bottom of window CH,CL = row,column of window's upper left corner DH,DL = row,column of window's lower right corner Note: affects only the currently active page (see AH=05h) Warning: some implementations have a bug which destroys BP SeeAlso: AH=07h,AH=72h,AH=73h ----------1007------------------------------- INT 10 - VIDEO - SCROLL DOWN WINDOW AH = 07h AL = number of lines by which to scroll down (00h=clear entire window) BH = attribute used to write blank lines at top of window CH,CL = row,column of window's upper left corner DH,DL = row,column of window's lower right corner Note: affects only the currently active page (see AH=05h) Warning: some implementations have a bug which destroys BP SeeAlso: AH=06h,AH=72h,AH=73h ----------1008------------------------------- INT 10 - VIDEO - READ CHARACTER AND ATTRIBUTE AT CURSOR POSITION AH = 08h BH = page number (00h to number of pages - 1) (see AH=00h) Return: AH = attribute bit 7: blink bits 6-4: background color 000 black 001 blue 010 green 011 cyan 100 red 101 magenta 110 brown 111 white bits 3-0: foreground color 0000 black 1000 dark gray 0001 blue 1001 light blue 0010 green 1010 light green 0011 cyan 1011 light cyan 0100 red 1100 light red 0101 magenta 1101 light magenta 0110 brown 1110 yellow 0111 light gray 1111 white AL = character Notes: for monochrome displays, a foreground of 1 with background 0 is underlined the blink bit may be reprogrammed to enable intense background colors using AX=1003h or by programming the CRT controller SeeAlso: AH=09h,AX=1003h ----------1009------------------------------- INT 10 - VIDEO - WRITE CHARACTER AND ATTRIBUTE AT CURSOR POSITION AH = 09h AL = character to display BH = page number (00h to number of pages - 1) (see AH=00h) BL = attribute (text mode) or color (graphics mode) if bit 7 set in graphics mode, character is xor'ed onto screen CX = number of times to write character Notes: all characters are displayed, including CR, LF, and BS replication count in CX may produce an unpredictable result in graphics modes if it is greater than the number of positions remaining in the current row SeeAlso: AH=08h,AH=0Ah,AH=4Bh,INT 17/AH=60h,INT 1F,INT 43,INT 44 ----------100A------------------------------- INT 10 - VIDEO - WRITE CHARACTER ONLY AT CURSOR POSITION AH = 0Ah AL = character to display BH = page number (00h to number of pages - 1) (see AH=00h) BL = attribute (PCjr only) or color (graphics mode) if bit 7 set in graphics mode, character is xor'ed onto screen CX = number of times to write character Notes: all characters are displayed, including CR, LF, and BS replication count in CX may produce an unpredictable result in graphics modes if it is greater than the number of positions remaining in the current row SeeAlso: AH=08h,AH=09h,AH=4Bh,INT 17/AH=60h,INT 1F,INT 43,INT 44 ----------100B--BH00------------------------- INT 10 - VIDEO - SET BACKGROUND/BORDER COLOR AH = 0Bh BH = 00h BL = background/border color (border only in text modes) SeeAlso: AH=0Bh/BH=01h ----------100B--BH01------------------------- INT 10 - VIDEO - SET PALETTE AH = 0BH BH = 01h BL = palette ID 00h background, green, red, and brown/yellow 01h background, cyan, magenta, and white SeeAlso: AH=0Bh/BH=00h ----------100C------------------------------- INT 10 - VIDEO - WRITE GRAPHICS PIXEL AH = 0Ch BH = page number AL = pixel color (if bit 7 set, value is xor'ed onto screen) CX = column DX = row Notes: valid only in graphics modes BH is ignored if the current video mode supports only one page SeeAlso: AH=0Dh,AH=46h ----------100D------------------------------- INT 10 - VIDEO - READ GRAPHICS PIXEL AH = 0Dh BH = page number CX = column DX = row Return: AL = pixel color Notes: valid only in graphics modes BH is ignored if the current video mode supports only one page SeeAlso: AH=0Ch,AH=47h ----------100E------------------------------- INT 10 - VIDEO - TELETYPE OUTPUT AH = 0Eh AL = character to write BH = page number BL = foreground color (graphics modes only) Notes: characters 07h (BEL), 08h (BS), 0Ah (LF), and 0Dh (CR) are interpreted and do the expected things IBM PC ROMs dated 4/24/81 and 10/19/81 require that BH be the same as the current active page SeeAlso: AH=02h,AH=0Ah ----------100F------------------------------- INT 10 - VIDEO - GET CURRENT VIDEO MODE AH = 0Fh Return: AH = number of character columns AL = display mode (see AH=00h) BH = active page (see AH=05h) Notes: if mode was set with bit 7 set ("no blanking"), the returned mode will also have bit 7 set EGA, VGA, and UltraVision return either AL=03h (color) or AL=07h (monochrome) in all extended-row text modes SeeAlso: AH=00h,AH=05h,AX=1130h,AX=CD04h ----------100F56BX4756----------------------- INT 10 - VUIMAGE DISPLAY DRIVER (v2.20 and below) AX = 0F56h BX = 4756h CX = 4944h DL = function 01h installation check Return: AX = 5649h BX = 4443h CX = 5647h DH = 01h 02h get first video mode's parameters Return: AX = BIOS mode number BX = widht in pixels CX = height in pixels DX = number of colors 03h get next video mode's parameters Return: as for DL=02h 04h display line??? ES:DI -> record (see below) ??? Return: ??? Notes: VUIMAGE is a shareware GIF/TIFF image viewer by Offe Enterprises the use of TSR display drivers was discontinued after v2.20 Format of record for DL=04h: Offset Size Description 00h WORD row number 02h WORD starting column??? 04h WORD ending column??? ??? ----------1010------------------------------- INT 10 - BIOS Window Extension v1.1 - SET WINDOW COORDINATES AH = 10h CH,CL = row,column of upper left corner of window DH,DL = row,column of lower right corner of window Return: AL = status 00h successful 01h failed AH destroyed Notes: BWE is a TSR by John J. Seal published in May 1986 Dr. Dobb's Journal when a window has been set, all output via AH=0Eh is restricted to the specified window SeeAlso: AH=11h"Window",AH=12h"Window" ----------101000---------------------------- INT 10 - VIDEO - SET SINGLE PALETTE REGISTER (PCjr,EGA,MCGA,VGA) AX = 1000h BL = palette register number (00h-0Fh) = attribute register number (undocumented) 10h attribute mode control register (should let BIOS control this) 11h overscan color register (see also AX=1001h) 12h color plane enable register (bits 3-0 enable corresponding text attribute bit) 13h horizontal PEL panning register 14h color select register BH = color or attribute register value Notes: on MCGA, only BX = 0712h is supported under UltraVision, the palette locking status (see AX=CD01h) determines the outcome SeeAlso: AX=1002h,AX=1007h,AX=CD01h ----------101001----------------------------- INT 10 - VIDEO - SET BORDER (OVERSCAN) COLOR (PCjr,EGA,VGA) AX = 1001h BH = border color (00h-3Fh) BUG: the original IBM VGA BIOS incorrectly updates the parameter save area and places the border color at offset 11h of the palette table rather than offset 10h Note: under UltraVision, the palette locking status (see AX=CD01h) determines the outcome SeeAlso: AX=1002h,AX=1008h,AX=CD01h ----------101002----------------------------- INT 10 - VIDEO - SET ALL PALETTE REGISTERS (PCjr,EGA,VGA) AX = 1002h ES:DX -> palette register list Note: under UltraVision, the palette locking status (see AX=CD01h) determines the outcome SeeAlso: AX=1000h,AX=1001h,AX=1009h,AX=CD01h Format of palette register list: Offset Size Description 00h 16 BYTEs colors for palette registers 00h through 0Fh 10h BYTE border color ----------101003----------------------------- INT 10 - VIDEO - TOGGLE INTENSITY/BLINKING BIT (Jr, PS, TANDY 1000, EGA, VGA) AX = 1003h BL = new state 00h background intensity enabled 01h blink enabled Note: although there is no function to get the current status, bit 5 of 0040h:0065h indicates the state SeeAlso: AH=08h ----------101007----------------------------- INT 10 - VIDEO - GET INDIVIDUAL PALETTE REGISTER (VGA,UltraVision v2+) AX = 1007h BL = palette or attribute (undoc) register number (see AX=1000h) Return: BH = palette or attribute register value Notes: UltraVision v2+ supports this function even on color EGA systems in video modes 00h-03h, 10h, and 12h; direct programming of the palette registers will cause incorrect results because the EGA registers are write-only. To guard against older versions or unsupported video modes, programs which expect to use this function on EGA systems should set BH to FFh on entry. SeeAlso: AX=1000h,AX=1009h ----------101008----------------------------- INT 10 - VIDEO - READ OVERSCAN (BORDER COLOR) REGISTER (VGA,UltraVision v2+) AX = 1008h Return: BH = border color (00h-3Fh) Notes: UltraVision v2+ supports this function even on color EGA systems in video modes 00h-03h, 10h, and 12h; direct programming of the palette registers will cause incorrect results because the EGA registers are write-only. To guard against older versions or unsupported video modes, programs which expect to use this function on EGA systems should set BH to FFh on entry. SeeAlso: AX=1001h ----------101009----------------------------- INT 10 - VIDEO - READ ALL PALETTE REGISTERS AND OVERSCAN REGISTER (VGA) AX = 1009h ES:DX -> 17-byte buffer (see AX=1002h) Notes: UltraVision v2+ supports this function even on color EGA systems in video modes 00h-03h, 10h, and 12h; direct programming of the palette registers will cause incorrect results because the EGA registers are write-only. To guard against older versions or unsupported video modes, programs which expect to use this function on EGA systems should set the ES:DX buffer to FFh before calling. SeeAlso: AX=1002h,AX=1007h,AX=CD02h ----------101010----------------------------- INT 10 - VIDEO - SET INDIVIDUAL DAC REGISTER (VGA/MCGA) AX = 1010h BX = register number CH = new value for green (0-63) CL = new value for blue (0-63) DH = new value for red (0-63) SeeAlso: AX=1012h,AX=1015h ----------101012----------------------------- INT 10 - VIDEO - SET BLOCK OF DAC REGISTERS (VGA/MCGA) AX = 1012h BX = starting color register CX = number of registers to set ES:DX -> table of 3*CX bytes where each 3 byte group represents one byte each of red, green and blue (0-63) SeeAlso: AX=1010h,AX=1017h ----------101013----------------------------- INT 10 - VIDEO - SELECT VIDEO DAC COLOR PAGE (VGA) AX = 1013h BL = subfunction 00h select paging mode BH = 00h select 4 blocks of 64 BH = 01h select 16 blocks of 16 01h select page BH = page number (00h to 03h) or (00h to 0Fh) Note: not valid in mode 13h SeeAlso: AX=101Ah ----------101015----------------------------- INT 10 - VIDEO - READ INDIVIDUAL DAC REGISTER (VGA/MCGA) AX = 1015h BL = palette register number Return: DH = red value CH = green value CL = blue value SeeAlso: AX=1010h,AX=1017h ----------101017----------------------------- INT 10 - VIDEO - READ BLOCK OF DAC REGISTERS (VGA/MCGA) AX = 1017h BX = starting palette register CX = number of palette registers to read ES:DX -> buffer (3 * CX bytes in size) (see also AX=1012h) Return: buffer filled with CX red, green and blue triples SeeAlso: AX=1012h,AX=1015h ----------101018----------------------------- INT 10 - VIDEO - undocumented - SET PEL MASK (VGA/MCGA) AX = 1018h BL = new PEL value SeeAlso: AX=1019h ----------101019----------------------------- INT 10 - VIDEO - undocumented - READ PEL MASK (VGA/MCGA) AX = 1019h Return: BL = value read SeeAlso: AX=1018h ----------10101A----------------------------- INT 10 - VIDEO - GET VIDEO DAC COLOR-PAGE STATE (VGA) AX = 101Ah Return: BL = paging mode 00h four pages of 64 01h sixteen pages of 16 BH = current page SeeAlso: AX=1013h ----------10101B----------------------------- INT 10 - VIDEO - PERFORM GRAY-SCALE SUMMING (VGA/MCGA) AX = 101Bh BX = starting palette register CX = number of registers to convert SeeAlso: AH=12h/BL=33h ----------1010F0----------------------------- INT 10 - VIDEO - Tseng ET-4000 BIOS - SET HiColor GRAPHICS MODE AX = 10F0h BL = video mode (see also AH=00h) 32768-color modes: 13h = 320x200 2Dh = 640x350 2Eh = 640x480 2Fh = 640x400 30h = 800x600 Return: AX = 0000h if successful other on error Note: the Tseng HiColor BIOS extensions are supported by: Diamond Computer Systems SpeedStar HiColor VGA Everex Systems HC VGA Focus Information Systems 2theMax 4000 Cardinal Technologies VGA732 SeeAlso: AX=10F1h ----------1010F1----------------------------- INT 10 - VIDEO - Tseng ET-4000 BIOS - GET DAC TYPE AX = 10F1h Return: BL = type of digital/analog converter 00h normal VGA DAC 01h Sierra SC1148x HiColor DAC else other HiColor DAC SeeAlso: AX=10F0h ----------1011------------------------------- INT 10 - BIOS Window Extension v1.1 - GET WINDOW COORDINATES AH = 11h Return: CH,CL = row,column of upper left corner DH,DL = row,column of lower right corner Note: BWE is a TSR by John J. Seal published in May 1986 Dr. Dobb's Journal SeeAlso: AH=10h"Window",AH=12h"Window" ----------1011------------------------------- INT 10 - VIDEO - TEXT-MODE CHARACTER GENERATOR FUNCTIONS (PS, EGA, VGA) AH = 11h The following functions will cause a mode set, completely resetting the video environment, but without clearing the video buffer AL = 00h, 10h: load user-specified patterns ES:BP -> user table CX = count of patterns to store DX = character offset into map 2 block BL = block to load in map 2 BH = number of bytes per character pattern AL = 01h, 11h: load ROM monochrome patterns (8 by 14) BL = block to load AL = 02h, 12h: load ROM 8 by 8 double-dot patterns BL = block to load AL = 03h: set block specifier BL = block specifier (EGA/MCGA) bits 0,1 = block selected by chars with attribute bit 3 = 0 bits 2,3 = block selected by chars with attribute bit 3 = 1 (VGA) bits 0,1,4 = block selected by attribute bit 3 = 0 bits 2,3,5 = block selected by attribute bit 3 = 1 AL = 04h, 14h: load ROM 8x16 character set (VGA) BL = block to load The routines called with AL=1xh are designed to be called only immediately after a mode set and are similar to the routines called with AL=0xh, except that: Page 0 must be active. Bytes/character is recalculated. Max character rows is recalculated. CRT buffer length is recalculated. CRTC registers are reprogrammed as follows: R09 = bytes/char-1 ; max scan line (mode 7 only) R0A = bytes/char-2 ; cursor start R0B = 0 ; cursor end R12 = ((rows+1)*(bytes/char))-1 ; vertical display end R14 = bytes/char ; underline loc (*** BUG: should be 1 less ***) SeeAlso: AX=CD10h ----------1011------------------------------- INT 10 - VIDEO - GRAPHICS-MODE CHARACTER GENERATOR FUNCTIONS (PS, EGA, VGA) AH = 11h AL = 20h: set user 8 by 8 graphics characters (INT 1F) ES:BP -> user table AL = 21h: set user graphics characters ES:BP -> user table CX = bytes per character BL = row specifier 00h user set DL = number of rows 01h 14 rows 02h 25 rows 03h 43 rows AL = 22h: ROM 8 by 14 set BL = row specifier (see above) AL = 23h: ROM 8 by 8 double dot BL = row specifier (see above) AL = 24h: load 8x16 graphics characters (VGA/MCGA) BL = row specifier (see above) AL = 29h: load 8x16 graphics characters (Compaq Systempro) BL = row specifier (see above) Notes: these functions are meant to be called only after a mode set UltraVision v2+ sets INT 43 to the appropriate font for AL=22h,23h,24h, and 29h SeeAlso: INT 1F, INT 43 ----------101130----------------------------- INT 10 - VIDEO - GET FONT INFORMATION (EGA, MCGA, VGA) AX = 1130h BH = pointer specifier 00h INT 1Fh pointer 01h INT 43h pointer 02h ROM 8x14 character font pointer 03h ROM 8x8 double dot font pointer 04h ROM 8x8 double dot font (high 128 characters) 05h ROM alpha alternate (9 by 14) pointer (EGA,VGA) 06h ROM 8x16 font (MCGA, VGA) 07h ROM alternate 9x16 font (VGA only) 11h (UltraVision v2+) 8x20 font (VGA) or 8x19 font (autosync EGA) 12h (UltraVision v2+) 8x10 font (VGA) or 8x11 font (autosync EGA) Return: ES:BP = specified pointer CX = bytes/character DL = character rows on screen - 1 Note: for UltraVision v2+, the 9xN alternate fonts follow the corresponding 8xN font at ES:BP+256N SeeAlso: AX=1100h,AX=1120h,INT 1F,INT 43 ----------1012------------------------------- INT 10 - BIOS Window Extension v1.1 - GET BLANKING ATTRIBUTE AH = 12h Return: BH = attribute to use on blanked lines when scrolling Note: BWE is a TSR by John J. Seal published in May 1986 Dr. Dobb's Journal SeeAlso: AH=11h"Window",AH=12h"Window" ----------1012--BL10------------------------- INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (PS, EGA, VGA, MCGA) - GET EGA INFO AH = 12h BL = 10h Return: BH = 00h color mode in effect (I/O port 3Dxh) 01h mono mode in effect (I/O port 3Bxh) BL = 00h 64k bytes memory installed 01h 128k bytes memory installed 02h 192k bytes memory installed 03h 256k bytes memory installed CH = feature bits CL = switch settings ----------1012--BL20------------------------- INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (PS,EGA,VGA,MCGA) - ALTERNATE PRTSC AH = 12h BL = 20h select alternate print screen routine Notes: installs a PrtSc routine from the video card's BIOS to replace the default PrtSc handler from the ROM BIOS, which usually does not understand screen heights other than 25 lines some adapters disable print-screen instead of enhancing it SeeAlso: INT 05 ----------1012--BL30------------------------- INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (VGA) - SELECT VERTICAL RESOLUTION AH = 12h BL = 30h AL = vertical resolution 00h 200 scan lines 01h 350 scan lines 02h 400 scan lines Return: AL = 12h if function supported ----------1012--BL31------------------------- INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (VGA, MCGA) - PALETTE LOADING AH = 12h BL = 31h AL = 00h enable default palette loading 01h disable default palette loading Return: AL = 12h if function supported ----------1012--BL32------------------------- INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (VGA, MCGA) - VIDEO ADDRESSING AH = 12h BL = 32h AL = 00h enable video addressing 01h disable video addressing Return: AL = 12h if function supported ----------1012--BL33------------------------- INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (VGA, MCGA) - GRAY-SCALE SUMMING AH = 12h BL = 33h AL = 00h enable gray scale summing 01h disable gray scale summing Return: AL = 12h if function supported SeeAlso: AX=101Bh,AX=BF06h ----------1012--BL34------------------------- INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (VGA) - CURSOR EMULATION AH = 12h BL = 34h AL = 00h enable alphanumeric cursor emulation 01h disable alphanumeric cursor emulation Return: AL = 12h if function supported ----------1012--BL35------------------------- INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (PS) - DISPLAY-SWITCH INTERFACE AH = 12h BL = 35h AL = 00h initial adapter video off 01h initial planar video on 02h switch active video off 03h switch inactive video on 80h *UNDOCUMENTED* set system board video active flag ES:DX -> buffer (128 byte save area if AL = 0, 2 or 3) Return: AL = 12h if function supported ----------1012--BL36------------------------- INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (PS, VGA) - VIDEO REFRESH CONTROL AH = 12h BL = 36h AL = 00h enable refresh 01h disable refresh Return: AL = 12h if function supported ----------1012--BH55------------------------- INT 10 - VIDEO - ALTERNATE FUNC SELECT (ATI,Tatung,Taxan) - ENHANCED FEATURES AH = 12h BH = 55h BL = subfunction 00h disabled enhanced features 01h enable enhanced features 02h get status Return: AL = status flags bit 3: set if enhanced features enabled bits 7-5 monitor type 000 PS/2 mono 001 PS/2 color 010 multi-sync 011 Taxan 650 25kHz 100 RGB 101 mono 110 EGA 111 Compaq internal 03h disable register trapping (CGA emulation) 04h enable register trapping 05h program mode described by table at ES:BP 06h get mode table AL = video mode Return: ES:BP -> table suitable for mode AL (and subfnc BL=05h) BP = FFFFh on error Format of ATI VGA Wonder video mode table: Offset Size Description 00h BYTE number of columns 01h BYTE maximum row (number of rows - 1) 02h BYTE scan lines per row 03h WORD video buffer size in bytes 05h 4 BYTEs values for Sequencer registers 1-4 09h BYTE value for Miscellaneous Output register 0Ah 25 BYTEs values for CRTC registers 00h-18h 00h horizontal total size (chars) 01h horizontal displayed (chars) 02h horizontal sync position (chars) 03h horizontal sync width (chars) 04h vertical total size (char rows) 05h vertical total adjust (scan lines) 06h vertical displayed (char rows) 07h vertical sync position (char rows) 08h interlace mode 09h max scan line in row 0Ah cursor start scan line 0Bh cursor end scan line 0Ch screen memory start (high) 0Dh screen memory start (low) 0Eh cursor address (high) 0Fh cursor address (low) 10h light pen (high) 11h light pen (low) 23h 20 BYTEs default palette (values for Attribute Controller regs 00h-13h) 37h 9 BYTEs values for Graphics Controller registers 00h-08h ----------1013------------------------------- INT 10 - VIDEO - WRITE STRING (AT and later,EGA) AH = 13h AL = write mode bit 0: update cursor after writing 1: string contains alternating characters and attributes BH = page number BL = attribute if string contains only characters CX = number of characters in string DH,DL = row,column at which to start writing ES:BP -> string to write Notes: recognizes CR, LF, BS, and bell also available PC or XT with EGA or higher BUG: on the IBM VGA Adapter, any scrolling which may occur is performed on the active page rather than the requested page SeeAlso: AH=09h,AH=0Ah ----------101400----------------------------- INT 10 - VIDEO - LOAD USER-SPECIFIED LCD CHARACTER FONT (CONV,Compaq Port 386) AX = 1400h ES:DI -> character font BH = number of bytes per character 08h or 10h (Compaq) BL = 00h load main font (block 0) 01h load alternate font (block 1) CX = number of characters to store DX = character offset into RAM font area SeeAlso: AH=11h,AX=1401h ----------101401----------------------------- INT 10 - VIDEO - LOAD SYSTEM ROM DEFAULT LCD CHARACTER FONT (CONV,CP386) AX = 1401h BL = font to load 00h main font (block 0) 01h alternate font (block 1) SeeAlso: AH=11h,AX=1400h ----------101402----------------------------- INT 10 - VIDEO - SET MAPPING OF LCD HIGH INTENSITY ATTRIBUTES (CONV,CP386) AX = 1402h BL = function 00h ignore high intensity attribute 01h map high intensity to underscore 02h map high intensity to reverse video 03h map high intensity to selected alternate font B0h half intensity (Compaq) B1h toggle active intensity bit interpretation (CP386) ----------1015------------------------------- INT 10 - VIDEO - GET PHYSICAL DISPLAY PARAMETERS (CONVERTIBLE) AH = 15h Return: AX = alternate display adapter type 0000h none 5140h LCD 5153h CGA 5151h mono ES:DI -> parameter table (see below) SeeAlso: AH=1Bh Format of display parameter table: Offset Size Description 00h WORD monitor model number 02h WORD vertical pixels per meter 04h WORD horizontal pixels per meter 06h WORD total vertical pixels 08h WORD total horizontal pixels 0Ah WORD horizontal pixel separation in micrometers 0Ch WORD vertical pixel separation in micrometers ----------1015------------------------------- INT 10 - VIDEO - SET SUPERIMPOSE MODE (Sperry PC) AH = 15h AL = superimpose mode 00h show graphics screen 01h show text screen 02h show text screen superimposed on graphics screen ----------101A------------------------------- INT 10 - VIDEO - DISPLAY COMBINATION (PS,VGA/MCGA) AH = 1Ah AL = 00h read display combination code Return: BL = active display code (see below) BH = alternate display code 01h set display combination code BL = active display code (see below) BH = alternate display code Return: AL = 1Ah if function was supported Values for display combination code: 00h no display 01h monochrome adapter w/ monochrome display 02h CGA w/ color display 03h reserved 04h EGA w/ color display 05h EGA w/ monochrome display 06h PGA w/ color display 07h VGA w/ monochrome analog display 08h VGA w/ color analog display 09h reserved 0Ah MCGA w/ digital color display 0Bh MCGA w/ monochrome analog display 0Ch MCGA w/ color analog display FFh unknown display type ----------101B------------------------------- INT 10 - VIDEO - FUNCTIONALITY/STATE INFORMATION (PS,VGA/MCGA) AH = 1Bh BX = implementation type 0000h return funtionality/state information ES:DI -> 64 byte buffer for state information (see below) Return: AL = 1Bh if function supported ES:DI buffer filled with state information SeeAlso: AH=15h Format of state information: Offset Size Description 00h DWORD address of static funtionality table (see below) 04h BYTE video mode in effect 05h WORD number of columns 07h WORD length of regen buffer in bytes 09h WORD starting address of regen buffer 0Bh WORD cursor position for page 0 0Dh WORD cursor position for page 1 0Fh WORD cursor position for page 2 11h WORD cursor position for page 3 13h WORD cursor position for page 4 15h WORD cursor position for page 5 17h WORD cursor position for page 6 19h WORD cursor position for page 7 1Bh WORD cursor type 1Dh BYTE active display page 1Eh WORD CRTC port address 20h BYTE current setting of register (3?8) 21h BYTE current setting of register (3?9) 22h BYTE number of rows 23h WORD bytes/character 25h BYTE display combination code of active display 26h BYTE DCC of alternate display 27h WORD number of colors supported in current mode 29h BYTE number of pages supported in current mode 2Ah BYTE number of scan lines active (0,1,2,3) = (200,350,400,480) 2Bh BYTE primary character block 2Ch BYTE secondary character block 2Dh BYTE miscellaneous flags bit 0 all modes on all displays on 1 gray summing on 2 monochrome display attached 3 default palette loading disabled 4 cursor emulation enabled 5 0 = intensity; 1 = blinking 6 PS/2 P70 plasma display (without 9-dot wide font) active 7 reserved 2Eh 3 BYTEs reserved (00h) 31h BYTE video memory available 00h = 64K, 01h = 128K, 02h = 192K, 03h = 256K 32h BYTE save pointer state flags bit 0 512 character set active 1 dynamic save area present 2 alpha font override active 3 graphics font override active 4 palette override active 5 DCC override active 6 reserved 7 reserved 33h 13 BYTEs reserved (00h) Format of Static Functionality Table: Offset Size Description 00h BYTE modes supported #1 bit 0 to bit 7 = 1 modes 0,1,2,3,4,5,6 supported 01h BYTE modes supported #2 bit 0 to bit 7 = 1 modes 8,9,0Ah,0Bh,0Ch,0Dh,0Eh,0Fh supported 02h BYTE modes supported #3 bit 0 to bit 3 = 1 modes 10h,11h,12h,13h supported bit 4 to bit 7 reserved 03h 4 BYTEs reserved 07h BYTE scan lines supported bit 0 to bit 2 = 1 if scan lines 200,350,400 supported 08h BYTE total number of character blocks available in text modes 09h BYTE maximum number of active character blocks in text modes 0Ah BYTE miscellaneous function flags #1 bit 0 all modes on all displays function supported 1 gray summing function supported 2 character font loading function supported 3 default palette loading enable/disable supported 4 cursor emulation function supported 5 EGA palette present 6 color palette present 7 color paging function supported 0Bh BYTE miscellaneous function flags #2 bit 0 light pen supported 1 save/restore state function 1Ch supported 2 intensity blinking function supported 3 Display Combination Code supported 4-7 reserved 0Ch WORD reserved 0Eh BYTE save pointer function flags bit 0 512 character set supported 1 dynamic save area supported 2 alpha font override supported 3 graphics font override supported 4 palette override supported 5 DCC extension supported 6 reserved 7 reserved 0Fh BYTE reserved ----------101C------------------------------- INT 10 - VIDEO - SAVE/RESTORE VIDEO STATE (PS50+,VGA) AH = 1Ch AL = 00h return state buffer size Return: BX = number of 64-byte blocks needed 01h save video state ES:BX -> buffer 02h restore video state ES:BX -> buffer containing previously saved state CX = requested states bit 0 video hardware 1 BIOS data areas 2 color registers and DAC state 3-15 reserved Return: AL = 1Ch if function supported ----------103000CX0000----------------------- INT 10 - VIDEO - LOCATE 3270PC CONFIGURATION TABLE (INSTALLATION CHECK) AX = 3000h CX = 0000h DX = 0000h Return: CX:DX -> 3270PC configuration table (see below for format) CX:DX = 0000h:0000h if 3270PC Control Program not active Format of 3270 PC configuration table: Offset Size Description 00h BYTE aspect ratio X 01h BYTE aspect ratio Y 02h BYTE monitor type 00h = 5151 (mono) or 5272 (color) 01h = 3295 02h = 5151 or 5272 with XGA (???) graphics adapter 03h = 5279 with 3270PC G adapter 04h = 5379 model C01 with 3270PC GX adapter 05h = 5379 model M01 with 3270PC GX adapter 07h = non-3270PC with 3270 Workstation Program FFh = 3270PC Control Program not loaded 03h BYTE reserved 04h BYTE adapter ID 00h = 5151/5272 adapter 04h = 5151/5272 with XGA adapter 30h = 3295 or 3270PC G/GX adapter 05h BYTE reserved 06h BYTE function flags 1 bit 7: mono text, 1 page 6: color text, 1 page 5: color text, 4 pages 4: CGA color graphics 3: 720x350 two-color graphics 2: 360x350 four-color graphics 1: 720x350 eight-color graphics 07h BYTE function flags 2 bit 6: GPI graphics supported 08h WORD segment address of Control Program Level table (see below) 0Ah 10 BYTEs reserved Format of Control Program Level table: Offset Size Description 00h WORD program version 02xxh = 3270PC Control Program v2.xx 03xxh = 3270PC Control Program v3.xx 04xxh = 3270 Workstation Program v1.xx 02h BYTE Control Program ID (00h) 03h 27 BYTEs Control Program Descriptor ("IBM 3270 PC CONTROL PROGRAM") ----------1040------------------------------- INT 10 - VIDEO - SET GRAPHICS MODE (Hercules GRAFIX) AH = 40h SeeAlso: AH=41h ----------1041------------------------------- INT 10 - VIDEO - SET TEXT MODE (Hercules GRAFIX) AH = 41h SeeAlso: AH=40h ----------1042------------------------------- INT 10 - VIDEO - CLEAR CURRENT PAGE (Hercules GRAFIX) AH = 42h SeeAlso: AH=45h ----------1043------------------------------- INT 10 - VIDEO - SELECT DRAWING PAGE (Hercules GRAFIX) AH = 43h AL = page number (0,1) SeeAlso: AH=44h,AH=45h ----------1044------------------------------- INT 10 - VIDEO - SELECT DRAWING FUNCTION (Hercules GRAFIX) AH = 44h AL = drawing function 00h clear pixels 01h set pixels 02h invert pixels SeeAlso: AH=44h,AH=46h,AH=4Ch,AH=4Dh ----------1045------------------------------- INT 10 - VIDEO - SELECT PAGE TO DISPLAY (Hercules GRAFIX) AH = 45h AL = page number (0,1) SeeAlso: AH=42h,AH=43h ----------1046------------------------------- INT 10 - VIDEO - DRAW ONE PIXEL (Hercules GRAFIX) AH = 46h DI = x (0-720) BP = y (0-347) Note: function 44h determines operation and function 43h which page to use SeeAlso: AH=0Ch,AH=47h,AH=49h,AH=4Ch,AH=4Dh ----------1047------------------------------- INT 10 - VIDEO - FIND PIXEL VALUE (Hercules GRAFIX) AH = 47h DI = x (0-720) BP = y (0-347) Return: AL = 00h pixel clear AL = 01h pixel set Note: function 43h specifies which page is used SeeAlso: AH=0Dh,AH=46h ----------1048------------------------------- INT 10 - VIDEO - MOVE TO POINT (Hercules GRAFIX) AH = 48h DI = x (0-720) BP = y (0-347) SeeAlso: AH=49h ----------1049------------------------------- INT 10 - VIDEO - DRAW TO POINT (Hercules GRAFIX) AH = 49h DI = x (0-720) BP = y (0-347) Note: function 48h or 49h specify first point, 44h operation and 43h page to use SeeAlso: AH=43h,AH=44h,AH=48h,AH=4Ch,AH=4Dh ----------104A------------------------------- INT 10 - VIDEO - BLOCK FILL (Hercules GRAFIX) AH = 4Ah DI = x coordinate of lower left corner BP = y coordinate of lower left corner BX = height in pixels CX = width in pixels Note: draws a solid rectangle SeeAlso: AH=4Eh ----------104B------------------------------- INT 10 - VIDEO - DISPLAY CHARACTER (Hercules GRAFIX) AH = 4Bh AL = character to display DI = x (0-720) BP = y (0-347) Note: unlike the other BIOS character functions character position is specified in pixels rather than rows and columns SeeAlso: AH=09h,AH=0Ah ----------104B------------------------------- INT 10 - FRIEZE v7+ - API AH = 4Bh CL = function 00h reserved 01h load window ES:BX -> ASCIZ filename from which to read 02h save window ES:BX -> ASCIZ filename to which to write 07h set window size ES:BX -> four-WORD structure with Xmin, Ymin, Xmax, Ymax 09h set patterns ES:BX -> 16-BYTE vector of screen->printer color correspondnces 0Ah get patterns ES:BX -> 16-BYTE buffer for color correspondences 0Bh set mode AL = mode 0Fh get window ES:BX -> four-WORD buffer for Xmin, Ymin, Xmax, Ymax 10h set print options ES:BX -> printer options in same format as FRIEZE cmdline 14h get version Return: AH = major version (00h if FRIEZE version before 7) AL = minor version 15h set parameters ES:BX -> parameter table (see below) 16h get parameters ES:BX -> buffer for parameter table (see below) 17h get printer resolution ES:BX -> 12-WORD table for six horizontal/vertical resol pairs 18h reserved (v8.0 only) Return: AX = status 00h successful 01h user aborted printout with ESC 02h reserved 03h file read error 04h file write error 05h file not found 06h invalid header (not an image or wrong screen mode) 07h file close error 08h disk error 09h printer error 0Ah invalid function 0Bh can't create file 0Ch wrong video mode Format of parameter table: Offset Size Description 00h WORD top margin (1/100 inch) 02h WORD left margin (1/100 inch) 04h WORD horizontal size (1/100 inch) 06h WORD vertical size (1/100 inch) 08h WORD quality/draft mode 00h draft mode 01h quality mode 02h use horizontal/vertical resolution for output resolution 0Ah WORD printer horizontal resolution (dots per inch) 0Ch WORD printer vertical resolution (dots per inch) 0Eh WORD reserved (FFFFh) Note: any field which should remain unchanged may be filled with FFFFh ----------104C------------------------------- INT 10 - VIDEO - DRAW ARC (Hercules GRAFIX) AH = 4Ch AL = quadrant (1 = upper right, 2 = upper left, etc) DI = x coordinate of center BP = y coordinate of center BX = radius SeeAlso: AH=49h,AH=4Dh ----------104D------------------------------- INT 10 - VIDEO - DRAW CIRCLE (Hercules GRAFIX) AH = 4Dh DI = x of center BP = y of center BX = radius SeeAlso: AH=49h,AH=4Ch ----------104E------------------------------- INT 10 - VIDEO - FILL AREA (Hercules GRAFIX) AH = 4Eh DI = x coordinate of an interior point BP = y coordinate of an interior point Notes: fills convex polygonal areas the first fill makes the figure solid, the second erases it SeeAlso: AH=4Ah ----------104F00----------------------------- INT 10 - VESA SuperVGA BIOS - GET SuperVGA INFORMATION AX = 4F00h ES:DI -> 256-byte buffer for SuperVGA information (see below) Return: AL = 4Fh function supported AH = status 00h successful 01h failed SeeAlso: AX=4F01h Format of SuperVGA information: Offset Size Description 00h 4 BYTEs signature ('VESA') 04h WORD VESA version number 06h DWORD pointer to OEM name 0Ah 4 BYTEs capabilities 0Eh DWORD pointer to list of supported VESA and OEM video modes 12h 238 BYTEs reserved ----------104F01----------------------------- INT 10 - VESA SuperVGA BIOS - GET SuperVGA MODE INFORMATION AX = 4F01h CX = SuperVGA video mode ES:DI -> 256-byte buffer mode information (see below) Return: AL = 4Fh function supported AH = status 00h successful 01h failed SeeAlso: AX=4F00h,AX=4F02h Format of mode information: Offset Size Description 00h WORD mode attributes bit 0: mode supported bit 1: optional information available bit 2: BIOS output supported bit 3: set if color, clear if monochrome bit 4: set if graphics mode, clear if text mode 02h BYTE window A attributes bit 0: exists bit 1: readable bit 2: writable bits 3-7 reserved 03h BYTE window B attributes (as for window A) 04h WORD window granularity in K 06h WORD window size in K 08h WORD start segment of window A 0Ah WORD start segment of window B 0Ch DWORD -> FAR window positioning function (equivalent to AX=4F05h) 10h WORD bytes per scan line ---remainder is optional for VESA modes, needed for OEM modes--- 12h WORD width in pixels 14h WORD height in pixels 16h BYTE width of character cell in pixels 17h BYTE height if character cell in pixels 18h BYTE number of memory planes 19h BYTE number of bits per pixel 1Ah BYTE number of banks 1Bh BYTE memory model type 1Ch BYTE size of bank in K ----------104F02----------------------------- INT 10 - VESA SuperVGA BIOS - SET SuperVGA VIDEO MODE AX = 4F02h BX = mode bit 15 set means don't clear video memory Return: AL = 4Fh function supported AH = status 00h successful 01h failed SeeAlso: AX=4F01h,AX=4F03h Values for VESA video mode: 00h-FFh OEM video modes (see AH=00h) 100h 640x400x256 101h 640x480x256 102h 800x600x16 103h 800x600x256 104h 1024x768x16 105h 1024x768x256 106h 1280x1024x16 107h 1280x1024x256 108h 80x60 text 109h 132x25 text 10Ah 132x43 text 10Bh 132x50 text 10Ch 132x60 text ----------104F03----------------------------- INT 10 - VESA SuperVGA BIOS - GET CURRENT VIDEO MODE AX = 4F03h Return: AL = 4Fh function supported AH = status 00h successful 01h failed BX = video mode (see AX=4F02h) SeeAlso: AX=4F02h ----------104F04----------------------------- INT 10 - VESA SuperVGA BIOS - SAVE/RESTORE SuperVGA VIDEO STATE AX = 4F04h DL = subfunction 00h get state buffer size Return: BX = number of 64-byte blocks needed 01h save video states ES:BX -> buffer 02h restore video states ES:BX -> buffer CX = flags for states to save/restore bit 0: video hardware state bit 1: video BIOS data state bit 2: video DAC state bit 3: SuperVGA state Return: AL = 4Fh function supported AH = status 00h successful 01h failed ----------104F05----------------------------- INT 10 - VESA SuperVGA BIOS - CPU VIDEO MEMORY CONTROL AX = 4F05h BH = subfunction 00h select video memory window DX = window address in video memory (in granularity units) 01h get video memory window Return: DX = window address in video memory (in gran. units) BL = window number 00h window A 01h window B Return: AL = 4Fh function supported AH = status 00h successful 01h failed SeeAlso: AX=4F06h,AX=4F07h,AX=7000h/BX=0004h ----------104F06----------------------------- INT 10 - VESA SuperVGA BIOS 1.1 - GET/SET LOGICAL SCAN LINE LENGTH AX = 4F06h BL = function 00h set scan line length CX = desired width in pixels 01h get scan line length Return: AL = 4Fh if function supported AH = status 00h successful 01h failed BX = bytes per scan line CX = number of pixels per scan line DX = maximum number of scan lines Notes: if the desired width is not achievable, the next larger width will be set the scan line may be wider than the visible area of the screen this function is valid in text modes, provided that values are multiplied by the character cell width/height SeeAlso: AX=4F01h,AX=4F05h,AX=4F07h ----------104F07BH00------------------------- INT 10 - VESA SuperVGA BIOS 1.1 - GET/SET DISPLAY START AX = 4F07h BH = 00h (reserved) BL = 00h set display start CX = leftmost displayed pixel in scan line DX = first displayed scan line = 01h get display start Return: BH = 00h CX = leftmost displayed pixel in scan line DX = first displayed scan line Return: AL = 4Fh if function supported AH = status 00h successful 01h failed Note: this function is valid in text modes, provided that values are multiplied by the character cell width/height SeeAlso: AX=4F01h,AX=4F05h,AX=4F06h ----------1050------------------------------- INT 10 - SCROLOCK.COM - INSTALLATION CHECK AH = 50h Return: BX = 1954h if installed AL = 00 if inactive, nonzero if active Note: SCROLOCK is a utility supplied with System Enhancement Associates' ARC SeeAlso: AH=51h ----------1051------------------------------- INT 10 - SCROLOCK.COM - ENABLE/DISABLE AH = 51h AL = state 00h disable nonzero enable Note: SCROLOCK is a utility supplied with System Enhancement Associates' ARC SeeAlso: AH=50h ----------105555----------------------------- INT 10 - VIDEO - ATI EGA/VGA Wonder Super Switch - INSTALLATION CHECK AX = 5555h Return: AX = AAAAh if installed BX:CX -> ??? routine in SMS.COM resident portion -> data area in VCONFIG Note: Super Switch (SMS.COM) is a video mode switch program supplied with ATI EGA Wonder. It also maps video mode 08h to 27h or 23h. SeeAlso: INT 10/AH=00h Format of data area: Offset Size Description 00h DWORD original INT 09 vector 04h DWORD original INT 10 vector 08h DWORD original INT 1C vector 0Ch WORD screen saver state, 0=off, 1=on 0Eh WORD blanking interval in clock ticks ----------106A00BX0000----------------------- INT 10 - Direct Graphics Interface Standard (DGIS) - INQUIRE AVAILABLE DEVICES AX = 6A00h BX = 0000h CX = 0000h DX = buffer length (may be 0) ES:DI -> buffer Return: BX = number of bytes stored in buffer CX = bytes required for all descriptions (0 if no DGIS) Note: buffer contains descriptions and addresses of DGIS-compatible display(s) and printer(s) SeeAlso: AX=6A02h ----------106A01CX0000----------------------- INT 10 - DGIS - REDIRECT CHARACTER OUTPUT AX = 6A01h CX = 0000h ES:DI = address of device to send INT 10 output to Return: CX = 0000h output could not be redirected else INT 10h output now routed to requested display SeeAlso: AX=6A02h ----------106A02----------------------------- INT 10 - DGIS - INQUIRE INT 10 OUTPUT DEVICE AX = 6A02h ES:DI = 0000h:0000h Return: ES:DI = 0000h:0000h if current display is non-DGIS else address of the current DGIS INT 10 display SeeAlso: AX=6A00h,AX=6A01h ----------106F00----------------------------- INT 10 - VIDEO - INSTALLATION CHECK (Video7 VGA,VEGA VGA) AX = 6F00h Return: BX = 5637h ('V7') indicates Video7 VGA/VEGA VGA extensions are present ----------106F01----------------------------- INT 10 - VIDEO - GET MONITOR INFO (Video7 VGA,VEGA VGA) AX = 6F01h Return: AL = monitor type code (VEGA VGA only) AH = status register information bit 0 = display enable 0 = display enabled 1 = vertical or horizontal retrace in progress bit 1 = light pen flip flop set bit 2 = light pen switch activated bit 3 = vertical sync bit 4 = monitor resolution 0 = high resolution (>200 lines) 1 = low resolution (<=200 lines) bit 5 = display type 0 = color 1 = monochrome bits6,7= diagnostic bits Note: bits 0-3 are the same as the EGA/VGA status register bits 0-3 ----------106F04----------------------------- INT 10 - VIDEO - GET MODE AND SCREEN RESOLUTION (Video7 VGA, VEGA VGA) AX = 6F04h Return: AL = current video mode (see AX=6F05h) BX = horizontal columns (text) or pixels (graphics) CX = vertical columns (text) or pixels (graphics) SeeAlso: AX=6F05h ----------106F05----------------------------- INT 10 - VIDEO - SET VIDEO MODE (Video7 VGA, VEGA EXTENDED EGA/VGA) AX = 6F05h BL = mode (see below) SeeAlso: AH=00h,AX=0070h Values for video mode: text/ text pixel pixel colors disp scrn system grph resol box resoltn page addr 00h-13h = standard IBM modes (see AH=00h) 40h = T 80x43 8x8 Video7/VEGA VGA 41h = T 132x25 8x14 Video7/VEGA VGA 42h = T 132x43 8x8 Video7/VEGA VGA 43h = T 80x60 8x8 Video7/VEGA VGA 44h = T 100x60 8x8 Video7/VEGA VGA 45h = T 132x28 8x8 Video7/VEGA VGA 60h = G 752x410 16 Video7 VGA, VEGA VGA 61h = G 720x540 16 Video7 VGA, VEGA VGA = G 720x540 16 Northgate 62h = G 800x600 16 Video7 VGA, VEGA Ext EGA 63h = G 1024x768 2 Video7 VGA 64h = G 1024x768 4 Video7 VGA 65h = G 1024x768 16 Video7 VGA, VEGA Ext EGA 66h = G 640x400 256 Video7 VGA, VEGA Ext VGA = G 640x400 256 Northgate 67h = G 640x480 256 Video7 VGA, VEGA Ext VGA 68h = G 720x540 256 Video7 VGA, VEGA Ext VGA 69h = G 800x600 256 Video7 VGA, VEGA Ext VGA 70h = G 752x410 16gray Video7 VGA, VEGA VGA 71h = G 720x540 16gray Video7 VGA, VEGA VGA 72h = G 800x600 16gray Video7 VGA 73h = G 1024x768 2gray Video7 VGA 74h = G 1024x768 4gray Video7 VGA 75h = G 1024x768 16gray Video7 VGA 76h = G 640x400 256gray Video7 VGA 77h = G 640x480 256gray Video7 VGA 78h = G 720x540 256gray Video7 VGA 79h = G 800x600 256gray (future) SeeAlso: AH=00h,AX=0070h,AX=007Eh,AX=6F04h ----------106F06----------------------------- INT 10 - VIDEO - SELECT AUTOSWITCH MODE (V7VGA,VEGA VGA) AX = 6F06h BL = Autoswitch mode select 00h select EGA/VGA-only modes 01h select Autoswitched VGA/EGA/CGA/MGA modes 02h select 'bootup' CGA/MGA modes BH = enable/disable (00h enable, 01h = disable selection) ----------106F07----------------------------- INT 10 - VIDEO - GET VIDEO MEMORY CONFIGURATION (V7VGA,VEGA VGA) AX = 6F07h Return: AL = 6Fh AH = bits 0-6 = number of 256K blocks of video memory bit 7 = DRAM/VRAM (0: DRAM, 1: VRAM) BH = chip revision (SR8F) (S/C Chip in VEGA VGA) BL = chip revision (SR8E) (G/A Chip in VEGA VGA) CX = 0000h SeeAlso: AH=12h/BL=10h ----------1070------------------------------- INT 10 - VIDEO - GET VIDEO RAM ADDRESS (TANDY 1000) AH = 70h Return: AX = segment address of the following [BX] = offset address of green plane [CX] = segment address of green plane [DX] = segment address of red/blue plane (red offset = 0, blue offset = 4000) SeeAlso: AH=71h ----------107000BX0000----------------------- INT 10 - Everex Extended Video BIOS - RETURN EMULATION STATUS AX = 7000h BX = 0000h Return: CL = monitor type 00h mono 01h CGA 02h EGA 03h digital multifrequency 04h IBM PS/2 05h IBM 8514 06h SuperVGA 07h analog multifrequency 08h super multifrequency CH = feature bits bits 7,6: 00 = 256K memory 01 = 512K memory 10 = 1024K 11 = 2048K memory bit 5: special oscillator present bit 4: VGA protect enabled bit 0: 6845 emulation DX = video board info bits 4-15: board ID model bits 0-3: board ID revision DI = BCD BIOS version number ----------107000BX0004----------------------- INT 10 - Everex Extended Video BIOS - GET PAGING FUNCTION POINTER FOR CURR MODE AX = 7000h BX = 0004h Return: ES:DI -> FAR paging function (call with DL = page to set) Note: the word preceding ES:DI is the length of the function in bytes, and the last byte of the function is a FAR return instruction. SeeAlso: AX=4F05h,AX=7000h/BX=0000h,AX=7000h/BX=0005h ----------107000BX0005----------------------- INT 10 - Everex Extended Video BIOS - GET SUPPORTED MODE INFO AX = 7000h BX = 0005h CL = maximum number of modes to get info for CH = mode type to get info for (see below) DL = monitor type to get info for ES:DI -> buffer for mode info (see below) Return: CL = total number of modes fitting criteria CH = size of each info record SeeAlso: AX=7000h/BX=0000h,AX=7000h/BX=0004h Values for mode type: 00h all modes 01h monochrome text modes 02h color text modes 03h four-color CGA graphics modes 04h two-color CGA graphics modes 05h 16-color graphics modes 06h 256-color graphics modes Format of mode information record: Offset Size Description 00h BYTE mode number (bit 7 set if extended mode) 01h BYTE mode type (see above) 02h BYTE info bits bits 7,6 reserved 5 monochrome mode 4 interlaced display 3 requires special oscillator 2,1 memory required 00 = 256K 01 = 512K 10 = 1024K 11 = 2048K 0 reserved 03h BYTE font height 04h BYTE text columns on screen 05h BYTE text rows on screen 06h WORD number of scan lines 08h BYTE color information bits 7-4 reserved 3-0 bits per pixel ----------1071------------------------------- INT 10 - VIDEO - GET INCRAM ADDRESSES (TANDY 1000) AH = 71h Return: AX = segment address of the following [BX] = segment address of INCRAM [CX] = offset address of INCRAM SeeAlso: AH=70h ----------1072------------------------------- INT 10 - VIDEO - SCROLL SCREEN RIGHT (TANDY 1000) AH = 72h AL = number of columns blanked at left of window 00h = blank entire window BH = attributes to be used on blank columns CH,CL = row, column of upper left corner of window DH,DL = row, column of lower right corner SeeAlso: AH=06h,AH=07h,AH=73h ----------1073------------------------------ INT 10 - VIDEO - SCROLL SCREEN LEFT (TANDY 1000) AH = 73h AL = number of columns blanked at right of window 00h = blank entire window BH = attributes to be used on blank columns CH,CL = row, column of upper left corner of window DH,DL = row, column of lower right corner SeeAlso: AH=06h,AH=07h,AH=72h ----------1080--DX4456----------------------- INT 10 - VIDEO (DESQview 2.0x only) - internal - SET ??? HANDLER AH = 80h DX = 4456h ('DV') ES:DI -> FAR subroutine to be called on ??? Return: DS = segment of DESQview data structure for video buffer Note: this function is probably meant for internal use only, due to the magic value required in DX the subroutine seems to be called when the DESQview menu is accessed; on entry, AL = 03h or 04h ----------1081--DX4456----------------------- INT 10 - VIDEO (DESQview 2.0x only) - internal - GET ??? AH = 81h DX = 4456h ('DV') Return: ES = segment of DESQview data structure for video buffer BYTE ES:[0] = current window number in DV 2.0x Note: this function is probably meant for internal use only, due to the magic value required in DX SeeAlso: AH=82h ----------1082--DX4456----------------------- INT 10 - VIDEO (DESQview 2.0x only) - internal - GET CURRENT WINDOW INFO AH = 82h DX = 4456h ('DV') Return: DS = segment in DESQview for data structure in DV 2.00, BYTE DS:[0] = window number WORD DS:[1] = segment of other data structure WORD DS:[3] = segment of window's object handle ES = segment of DESQview data structure for video buffer AL = current window number AH = ??? BL = direct screen writes 00h program does not do direct writes 01h program does direct writes, so shadow buffer not usable BH = ??? CL = current video mode CH = ??? Note: this function is probably meant for internal use only, due to the magic value required in DX SeeAlso: AH=81h ----------108B------------------------------- INT 10 - Alloy MW386 - FORCE WORKSTATION SCREEN UPDATE AH = 8Bh SeeAlso: AH=92h,AH=93h ----------1090------------------------------- INT 10 - Alloy MW386 - GET PHYSICAL WORKSTATION DISPLAY MODE AH = 90h Return: AL = current video mode (see AH=00h) SeeAlso: AH=91h ----------1091------------------------------- INT 10 - Alloy MW386 - GET PHYSICAL WORKSTATION ADAPTER TYPE AH = 91h Return: AL = video adapter type 00h monochrome 01h Hercules monochrome graphics 02h CGA 03h EGA 04h VGA 80h monochrome text terminal 81h Hercules graphics terminal 82h color graphics terminal Note: types less than 80h do not imply that the current user is on the host SeeAlso: AH=90h ----------1092------------------------------- INT 10 - Alloy MW386 - INHIBIT WORKSTATION SCREEN UPDATES AH = 92h Note: the terminal will be updated even when screen updates are inhibited if TTY output is used SeeAlso: AH=8Bh ----------1093------------------------------- INT 10 - Alloy MW386 - REDRAW SCREEN AH = 93h SeeAlso: AH=8Bh ----------10BF00----------------------------- INT 10 - VIDEO - Compaq Portable Extensions - SELECT EXTERNAL MONITOR AX = BF00h Note: all registers preserved and the internal monitor is blanked the external monitor becomes the active monitor SeeAlso: AX=BF01h ----------10BF01----------------------------- INT 10 - VIDEO - Compaq Portable Extensions - SELECT INTERNAL MONITOR AX = BF01h Note: all registers preserved and the external monitor is blanked the internal monitor becomes the active monitor SeeAlso: AX=BF00h ----------10BF02----------------------------- INT 10 - VIDEO - Compaq Portable Extensions - SET MASTER MODE OF CURRENT CTRLR AX = BF02h BH = master mode 04h CGA 05h EGA 07h MDA SeeAlso: AX=BF03h ----------10BF03BX0000----------------------- INT 10 - VIDEO - Compaq Portable/Systempro Extensions - GET ENVIRONMENT AX = BF03h BX = 0000h Return: BH = active monitor 00h = external 01h = internal BL = master mode 00h = switchable VDU not present 04h = CGA 05h = EGA 07h = MDA 08h = switchable LCD controller present CH = 00h (reserved) CL = switchable VDU mode supported bit 0 = CGA supported bits 1,2 = reserved (1) bit 3 = MDA supported bits 4-7 = reserved (1) DH = internal monitor type 00h = none 01h = Dual-mode monitor 02h = 5153 RGB monitor 03h = Compaq Color monitor 04h = 640x400 flat panel 07h = LCD VGA DL = external monitor type 00h = none 01h = dual-mode monitor 02h = 5153 RGB monitor 03h = Compaq Color monitor 04h = 640x400 flat panel 05h = VGC monochrome 06h = VGC color SeeAlso: AH=1Ah,AX=BF00h,AX=BF01h,AX=BF02h ----------10BF04----------------------------- INT 10 - VIDEO - Compaq Portable Extensions - SET MODE SWITCH DELAY AX = BF04h BH = new state of delay 00h enabled 01h disabled SeeAlso: AX=BF05h ----------10BF05----------------------------- INT 10 - VIDEO - Compaq Systempro Extensions - ENABLE/DISABLE DISPLAY AX = BF05h BH = new state of video 00h off 01h on SeeAlso: AX=BF04h ----------10BF06----------------------------- INT 10 - VIDEO - Compaq SLT/286 - READ GRAY SCALE TABLE AX = BF06h CL = address to be read from gray scale table Return: AL = bit 3-0 - Value read from gray scale table CL = address to be read from gray scale table SeeAlso: AH=12h/BL=33h,AX=BF07h ----------10BF07----------------------------- INT 10 - VIDEO - Compaq SLT/286 - WRITE GRAY SCALE TABLE AX = BF07h CH = value to write to gray scale table CL = address to be written to gray scale table SeeAlso: AX=BF06h ----------10BF08----------------------------- INT 10 - VIDEO - Compaq SLT/286 - WRITE COLOR MIX REGISTERS AX = BF08h CH = bits 7-4 - Green weight bits 3-0 - Blue weight CL = bits 7-4 - unused bits 3-0 - Red weight ----------10CC00SI0000----------------------- INT 10 - VIDEO - UltraVision - GET STATUS (INSTALLATION CHECK) AX = CC00h SI = 0000h (if checking version) Return: CX = ABCDh AL = Ultravision extensions 00h enabled FFh disabled AH = card designator BX:00F0h -> palette values (for compatibility with NEWFONT) DX = support for high resolution modes 00h not active 01h active SI = UltraVision version number (v1.2+), high byte=major,low byte=minor = unchanged for versions <1.2 SeeAlso: AX=CC01h,AX=CC02h ----------10CC01----------------------------- INT 10 - VIDEO - UltraVision - DISABLE EXTENSIONS AX = CC01h Notes: subsequent BIOS calls will be passed through to previous handler should be followed immediately by mode set to restore normal EGA/VGA state SeeAlso: AX=CC02h ----------10CC02----------------------------- INT 10 - VIDEO - UltraVision - ENABLE EXTENSIONS AX = CC02h Note: should be followed immediately by mode set to restore previous UltraVision state SeeAlso: AX=CC01h ----------10CD00----------------------------- INT 10 - VIDEO - UltraVision - LOAD ULTRAVISION PALETTE (color EGA,VGA) AX = CD00h CL = palette table number (01h-07h for v1.x, 01h-0Fh for v2+) DS:DX -> 16-byte palette register list (colors for registers 00h-0Fh) Notes: if palette locking is in effect for the current mode, the new colors will be displayed immediately; otherwise, the system reverts to the default palette palette table 0 is reserved for the default palette and cannot be set UltraVision always sets the border color to black SeeAlso: AX=CD01h,AX=CD02h ----------10CD01----------------------------- INT 10 - VIDEO - UltraVision - SET PALETTE LOCKING STATUS (color EGA,VGA) AX = CD01h CL = palette locking value 00h none 01h text modes only (02h,03h) FFh all modes (all standard color text and graphics modes) Notes: intended for video modes with 16 or fewer colors SeeAlso: AX=1000h,AX=1002h,AX=CD00h,AX=CD03h ----------10CD02----------------------------- INT 10 - VIDEO - UltraVision - GET ULTRAVISION PALETTE (EGA,VGA) AX = CD02h Return: CL = palette table number DS:DX -> 17-byte palette register list DS:SI -> current font names table (see below) Note: only the font names are valid on monochrome EGA systems SeeAlso: AX=1009h,AX=CD00h Format of palette register list: Offset Size Description 00h 16 BYTEs colors for palette registers 00h through 0Fh 10h BYTE border color Format of current font names table (v2+): Offset Size standard EGA HiRes EGA VGA 00h 8 BYTEs N/A F19 font F20 font 08h 8 BYTEs F14 font F14 font F14 font 10h 8 BYTEs N/A F11 font F10 font 18h 8 BYTEs F8 font F8 font F8 font Format of current font names table (v1.x): Offset Size HiRes EGA 00h 8 BYTEs F19/F14 font 08h 8 BYTEs F11/F8 font ----------10CD03----------------------------- INT 10 - VIDEO - UltraVision - GET PALETTE LOCKING STATUS (color EGA,VGA) AX = CD03h Return: CL = palette locking value 00h none 01h text modes only FFh all modes SeeAlso: AX=CD01h ----------10CD04----------------------------- INT 10 - VIDEO - UltraVision - GET UltraVision TEXT MODE (EGA,VGA) AX = CD04h Return: AL = mode number 11h 80x25 12h 80x43, 80x50 13h 80x34, 80x36 14h 80x60, 80x63 19h 94x25 1Ah 94x43, 94x50 1Bh 94x36 1Ch 94x63 21h 108x25 22h 108x43, 108x50 23h 107x34, 108x36 24h 108x60, 108x63 31h 120x25 32h 120x43, 120x50 33h 132x25 34h 132x44, 132x50 39h 120x36 3Ah 120x63 3Bh 132x36 3Ch 132x60 SeeAlso: AH=0Fh,AX=CC00h,AH=CDh ----------10CD05----------------------------- INT 10 - VIDEO - UltraVision - SET CURSOR TYPE (EGA,VGA) AX = CD05h CL = type 00h line cursor FFh box cursor Note: sets default cursor type for text-based programs SeeAlso: AH=01h,AX=CD06h ----------10CD06----------------------------- INT 10 - VIDEO - UltraVision - GET CURSOR TYPE (EGA,VGA) AX = CD06h Return: CL = type 00h line cursor FFh box cursor SeeAlso: AH=03h,AX=CD05h ----------10CD07----------------------------- INT 10 - VIDEO - UltraVision v1.2+ - SET UNDERLINE STATUS (EGA,VGA) AX = CD07h CL = hardware underline status 00h off (color systems only) 01h underline below characters 02h strike through characters BL = foreground color for normal text (FFh = current) BH = foreground color for bright text (FFh = current) Return: CL = hardware underline status BL = current foreground color for normal text BH = current foreground color for bright text Notes: when underline or strikeout is enabled in color text modes, the specified colors will be assigned temporarily to colors 01h and 09h, allowing affected text to match non-underlined text. The color remapping uses values from the current onscreen palette regardless of the palette locking status (see AX=CD01h) specify the standard colors (BL=01h,BH=09h) to enable underline or strikeout without color remapping SeeAlso: AX=CD08h ----------10CD08----------------------------- INT 10 - VIDEO - UltraVision v1.2+ - GET UNDERLINE STATUS (EGA,VGA) AX = CD08h Return: CL = hardware underline status (see AX=CD07h) BL = foreground color for normal text BH = foreground color for bright text Note: only CL is valid on monochrome EGA systems SeeAlso: AX=CD07h ----------10CD10----------------------------- INT 10 - VIDEO - UltraVision - LOAD USER FONT (EGA,VGA) AX = CD10h BH = bytes per character (08h,0Ah,0Bh,0Eh,13h,14h) CX = ABCDh load 9xN alternate font (v2+) else number of characters to load DX = character offset into font table DS:SI -> 8-byte ASCII font name ES:BP -> font definitions Return: AX = FFFFh if invalid font parameters Notes: loads the designated characters into UltraVision's resident font area should be followed by a video mode set to reload character generator SeeAlso: AX=1100h ----------10CD------------------------------- INT 10 - VIDEO - UltraVision - SET ULTRAVISION TEXT MODE (EGA,VGA) AH = CDh AL = text mode number (see AX=CD04h) Return: AX = CDCDh if invalid mode SeeAlso: AX=CD04h ----------10EF------------------------------- INT 10 - VIDEO - MSHERC.COM - INSTALLATION CHECK??? AH = EFh Return: DL = video adapter type 00h original Hercules 01h ??? \ one is probably Hercules Plus, the other 02h ??? / Hercules InColor FFh non-Hercules DH = memory mode byte 01h "half" mode 03h "full" mode Note: MSHERC.COM is a support program for the Microsoft Quick languages which makes their graphics libraries compatible with a Hercules card by adding video modes 08h and 88h, and supporting text in the new graphics modes. While in mode 08h or 88h, INT 10 supports the Hercules card much like a CGA. ----------10F0------------------------------- INT 10 - EGA Register Interface Library - READ ONE REGISTER AH = F0h BL = register number BH = 00h DX = group index Pointer/data chips 00h CRT Controller (25 reg) 3B4h mono modes, 3D4h color modes 08h Sequencer (5 registers) 3C4h 10h Graphics Controller (9 registers) 3CEh 18h Attribute Controller (20 registers) 3C0h Single registers 20h Miscellaneous Output register 3C2h 28h Feature Control register (3BAh mono modes, 3DAh color modes) 30h Graphics 1 Position register 3CCh 38h Graphics 2 Position register 3CAh Return: BL = data Note: provided by the Microsoft Mouse driver, OS/2 compatibility box, and others SeeAlso: AH=F1h,AH=F2h,INT 2F/AX=BC00h ----------10F1------------------------------- INT 10 - EGA Register Interface Library - WRITE ONE REGISTER AH = F1h DX = group index (see AH=F0h) if single register: BL = value to write otherwise BL = register number BH = value to write Return: BL = data Note: provided by the Microsoft Mouse driver, OS/2 compatibility box, and others SeeAlso: AH=F0h,AH=F3h ----------10F2------------------------------- INT 10 - EGA Register Interface Library - READ REGISTER RANGE AH = F2h CH = starting register number CL = Number of registers (>1) DX = group index 00h CRTC (3B4h mono modes, 3D4h color modes) 08h Sequencer 3C4h 10h Graphics Controller 3CEh 18h Attribute Controller 3C0h ES:BX -> buffer, CL bytes Note: provided by the Microsoft Mouse driver, OS/2 compatibility box, and others SeeAlso: AH=F0h,AH=F3h ----------10F3------------------------------- INT 10 - EGA Register Interface Library - WRITE REGISTER RANGE AH = F3h CH = starting register CL = number of registers (>1) DX = group index (see AH=F2h) ES:BX -> buffer, CL bytes Note: provided by the Microsoft Mouse driver, OS/2 compatibility box, and others SeeAlso: AH=F1h,AH=F2h ----------10F4------------------------------- INT 10 - EGA Register Interface Library - READ REGISTER SET AH = F4h CX = number of registers to read (>1) ES:BX -> table of records (see below) Return: register values in table filled in Note: provided by the Microsoft Mouse driver, OS/2 compatibility box, and others SeeAlso: AH=F0h,AH=F2h,AH=F5h Format of entries in table of register records: Offset Size Description 00h WORD group index Pointer/data chips 00h CRTC (3B4h mono modes, 3D4h color modes) 08h Sequencer 3C4h 10h Graphics Controller 3CEh 18h Attribute Controller 3C0h Single registers 20h Miscellaneous Output register 3C2h 28h Feature Control register (3BAh mono modes, 3DAh color) 30h Graphics 1 Position register 3CCh 38h Graphics 2 Position register 3CAh 02h BYTE register number (0 for single registers) 03h BYTE register value ----------10F5------------------------------- INT 10 - EGA Register Interface Library - WRITE REGISTER SET AH = F5h CX = number of registers to write (>1) ES:BX -> table of records (see AH=F4h) Note: provided by the Microsoft Mouse driver, OS/2 compatibility box, and others SeeAlso: AH=F1h,AH=F3h,AH=F4h ----------10F6------------------------------ INT 10 - EGA Register Interface Library - REVERT TO DEFAULT REGISTERS AH = F6h Note: provided by the Microsoft Mouse driver, OS/2 compatibility box, and others SeeAlso: AH=F7h ----------10F7------------------------------ INT 10 - EGA Register Interface Library - DEFINE DEFAULT REGISTER TABLE AH = F7h DX = port number Pointer/data chips 00h CRTC (3B4h mono modes, 3D4h color modes) 08h Sequencer 3C4h 10h Graphics Controller 3CEh 18h Attribute Controller 3C0h Single registers 20h Miscellaneous Output register 3C2h 28h Feature Control register (3BAh mono modes, 3DAh color modes) 30h Graphics 1 Position register 3CCh 38h Graphics 2 Position register 3CAh ES:BX -> table of one-byte entries, one byte to be written to each register Note: provided by the Microsoft Mouse driver, OS/2 compatibility box, and others SeeAlso: AH=F6h ----------10FA--BX0000---------------------- INT 10 - EGA Register Interface Library - INTERROGATE DRIVER AH = FAh BX = 0000h Return: BX = 0000h if mouse driver not present ES:BX -> EGA Register Interface version number, if present: byte 0 = major release number byte 1 = minor release number Note: provided by the Microsoft Mouse driver, OS/2 compatibility box, and others SeeAlso: AH=F6h,INT 2F/AX=BC00h ----------10FA------------------------------ INT 10 - FASTBUFF.COM - INSTALLATION CHECK AH = FAh Return: AX = 00FAh if installed ES = segment of resident code Note: FASTBUFF.COM is a keyboard speedup/screen blanking utility by David Steiner ----------10FE------------------------------ INT 10 - TopView - GET SHADOW BUFFER AH = FEh ES:DI -> assumed video buffer (B800h:0000h color, B000h:0000h mono) Return: ES:DI -> actual video buffer for calling process Notes: if no multitasker is installed, ES:DI is returned unchanged TopView requires a call to AH=FFh to notify it that the screen has changed; DESQview will check for changes itself until the first call to AH=FFh SeeAlso: AH=FFh,INT 15/AX=1024h,INT 21/AH=2Bh"DESQview" ----------10FF------------------------------- INT 10 - TopView - UPDATE SCREEN FROM SHADOW BUFFER AH = FFh CX = number of consecutive changed characters ES:DI -> first changed character in shadow buffer Notes: avoid CX=0000h DESQview will discontinue the automatic screen updating initiated by AH=FEh after this call SeeAlso: AH=FEh ----------10FF------------------------------- INT 10 - DJ GO32.EXE 80386+ DOS extender - VIDEO EXTENSIONS AH = FFh AL = video mode 00h 80x25 text 01h default text 02h CXxDX text 03h biggest text 04h 320x200 graphics 05h default graphics 06h CXxDX graphics 07h biggest non-interlaced graphics 08h biggest graphics SeeAlso: AH=00h,INT 21/AH=FFh"GO32" ----------10FF00----------------------------- INT 10 - CARBON COPY PLUS 5.0 - CHECK IF CC CONNECTED TO CCHELP AX = FF00h Return: BL = 00h not connected = 01h connected ----------10FF01----------------------------- INT 10 - CARBON COPY PLUS 5.0 - DISCONNECT AND RESET LINE AX = FF01h ----------10FF02----------------------------- INT 10 - CARBON COPY PLUS 5.0 - GET LAST PHONE NUMBER DIALED AX = FF02h Return: ES:DI -> ASCIZ phone number ----------11--------------------------------- INT 11 - CPU-generated (80486+) - ALIGNMENT CHECK Bit AC in the EFLAGS register enables this interrupt on a memory reference on a mis-aligned address when in privilege mode 3. ----------11--------------------------------- INT 11 - BIOS - GET EQUIPMENT LIST Return: AX = BIOS equipment list word bits 0 floppy disk(s) installed (see bits 6-7) 1 80x87 coprocessor installed 2,3 number of 16K banks of RAM on motherboard (PC only) number of 64K banks of RAM on motherboard (XT only) 2 pointing device installed (PS) 3 unused (PS) 4-5 initial video mode 00 EGA, VGA, or PGA 01 40x25 color 10 80x25 color 11 80x25 monochrome 6-7 number of floppies installed less 1 (if bit 0 set) 8 DMA support installed (PCjr, some Tandy 1000s, 1400LT) 9-11 number of serial ports installed 12 game port installed 13 serial printer attached (PCjr) internal modem installed (PC/Convertible) 14-15 number of parallel ports installed ---Compaq and many other 386/486 machines-- EAX bit 23: page tables set so that Weitek coprocessor addressable in real mode bit 24: Weitek math coprocessor present ---Compaq Systempro EAX bit 25: internal DMA parallel port available 26: IRQ for internal DMA parallel port (if bit 25 set) 0 = IRQ5 1 = IRQ7 27,28: parallel port DMA channel 00 DMA channel 0 01 DMA channel 0 ??? 10 reserved 11 DMA channel 3 SeeAlso: INT 12 ----------11BC--DX1954----------------------- INT 11 - BNU FOSSIL - INSTALLATION CHECK AH = BCh DX = 1954h Return: AX = 1954h ES:DX -> entry point of driver (instead of INT 14) ----------11FFFECXFFFE----------------------- INT 11 - BACK&FORTH (before v1.62) API AX = FFFEh CX = FFFEh BX = function 00h installation check Return: AX = 0001h BNFHIGH and BNFLOW both loaded = 0003h only BNFHIGH loaded else neither loaded 01h ??? Return: DX:AX -> ??? 02h ??? 03h ??? 04h ??? 05h ??? switches current PSP segment and stack if BNFLOW has not yet announced itself installed 06h ??? Return: AX = ??? SeeAlso: INT 12/AX=FFFEh ----------12--------------------------------- INT 12 - BIOS - GET MEMORY SIZE Return: AX = kilobytes of contiguous memory starting at absolute address 00000h Note: this call returns the contents of the word at 0040h:0013h; in PC and XT, this value is set from the switches on the motherboard SeeAlso: INT 11 ----------12FFFECXFFFE----------------------- INT 12 - Back&Forth v1.62+ - API AX = FFFEh CX = FFFEh BX = function 00h installation check Return: AX = 0001h installed else not loaded 02h build program ID list ES:DI -> buffer of at least 100 bytes, to be filled with words Return: AX = number of programs defined ES:DI buffer filled with AX words 03h switch to specified task (task need not be open yet) DX = two-letter program ID Return: AX = 0000h if task undefined SeeAlso: INT 11/AX=FFFEh ----------1300------------------------------- INT 13 - DISK - RESET DISK SYSTEM AH = 00h DL = drive (if bit 7 is set both hard disks and floppy disks reset) Return: AH = status (see AH=01h) Note: forces controller to recalibrate drive heads (seek to track 0) SeeAlso: AH=0Dh,AH=11h,INT 21/AH=0Dh,INT 4E"TI Professional" ----------1301------------------------------- INT 13 - DISK - GET STATUS OF LAST OPERATION AH = 01h DL = drive (bit 7 set for hard disk) Return: AH = status of this call (00h) AL = status of previous operation 00h successful completion 01h invalid function in AH or invalid parameter 02h address mark not found 03h disk write-protected (floppy) 04h sector not found 05h reset failed (hard disk) 06h disk changed (floppy) 07h drive parameter activity failed (hard disk) 08h DMA overrun 09h attempted DMA across 64K boundary 0Ah bad sector detected (hard disk) 0Bh bad track detected (hard disk) 0Ch unsupported track or invalid media 0Dh invalid number of sectors on format (hard disk) 0Eh control data address mark detected (hard disk) 0Fh DMA arbitration level out of range (hard disk) 10h uncorrectable CRC or ECC error on read 11h data ECC corrected (hard disk) 20h controller failure 40h seek failed 80h timeout (not ready) AAh drive not ready (hard disk) BBh undefined error (hard disk) CCh write fault (hard disk) E0h status register error (hard disk) FFh sense operation failed (hard disk) Note: some BIOSes return the status of the previous operation in AH ----------1302------------------------------- INT 13 - DISK - READ SECTOR(S) INTO MEMORY AH = 02h AL = number of sectors to read (must be nonzero) CH = low eight bits of cylinder number CL = sector number (bits 0-5) high two bits of cylinder (bits 6-7, hard disk only) DH = head number DL = drive number (bit 7 set for hard disk) ES:BX -> data buffer Return: CF set on error if AH = 11h (corrected ECC error), AL = burst length CF clear if successful AH = status (see AH=01h) AL = number of sectors transferred Notes: errors on a floppy may be due to the motor failing to spin up quickly enough; the read should be retried at least three times, resetting the disk with AH=00h between attempts AWARD AT BIOS extended to handle more than 1024 cylinders by placing bits 10 and 11 of the cylinder number into bits 6 and 7 of DH apparently, the AMI BIOS also follows this convention SeeAlso: AH=03h,AH=0Ah ----------1303------------------------------- INT 13 - DISK - WRITE DISK SECTOR(S) AH = 03h AL = number of sectors to write (must be nonzero) CH = low eight bits of cylinder number CL = sector number (bits 0-5) high two bits of cylinder (bits 6-7, hard disk only) DH = head number DL = drive number (bit 7 set for hard disk) ES:BX -> data buffer Return: CF set on error CF clear if successful AH = status (see AH=01h) AL = number of sectors transferred Notes: errors on a floppy may be due to the motor failing to spin up quickly enough; the write should be retried at least three times, resetting the disk with AH=00h between attempts AWARD AT BIOS extended to handle more than 1024 cylinders by placing bits 10 and 11 of the cylinder number into bits 6 and 7 of DH apparently, the AMI BIOS also follows this convention SeeAlso: AH=02h,AH=0Bh ----------1304------------------------------- INT 13 - DISK - VERIFY DISK SECTOR(S) AH = 04h AL = number of sectors to verify (must be nonzero) CH = low eight bits of cylinder number CL = sector number (bits 0-5) high two bits of cylinder (bits 6-7, hard disk only) DH = head number DL = drive number (bit 7 set for hard disk) ES:BX -> data buffer (PC,XT,AT with BIOS prior to 11/15/85) Return: CF set on error CF clear if successful AH = status (see AH=01h) AL = number of sectors verified Notes: errors on a floppy may be due to the motor failing to spin up quickly enough; the write should be retried at least three times, resetting the disk with AH=00h between attempts this function does not compare the disk with memory, it merely checks whether the sector's stored CRC matches the data's actual CRC AWARD AT BIOS extended to handle more than 1024 cylinders by placing bits 10 and 11 of the cylinder number into bits 6 and 7 of DH apparently, the AMI BIOS also follows this convention SeeAlso: AH=02h ----------1305------------------------------- INT 13 - FLOPPY - FORMAT TRACK AH = 05h AL = number of sectors to format CH = track number DH = head number DL = drive number ES:BX -> address field buffer (see below) Return: CF set on error CF clear if successful AH = status (see AH=01h) Notes: on AT or higher, call AH=17h first the number of sectors per track is read from the diskette parameter table pointed at by INT 1E SeeAlso: AH=05h"FIXED",AH=17h,AH=18h,INT 1E Format of address field buffer entry (one per sector in track): Offset Size Description 00h BYTE track number 01h BYTE head number (0-based) 02h BYTE sector number 03h BYTE sector size (00h=128 bytes, 01h=256 bytes, 02h=512, 03h=1024) ----------1305------------------------------- INT 13 - FIXED DISK - FORMAT TRACK AH = 05h AL = interleave value (XT-type controllers only) ES:BX = 512-byte format buffer the first 2*(sectors/track) bytes contain F,N for each sector F = 00h for good sector, 80h for bad sector N = sector number CH = cylinder number (bits 8,9 in high bits of CL) CL = high bits of cylinder number (bits 7,6) DH = head DL = drive Return: AH = status code (see AH=01h) Notes: AWARD AT BIOS extended to handle more than 1024 cylinders by placing bits 10 and 11 of the cylinder number into bits 6 and 7 of DH apparently, the AMI BIOS also follows this convention for XT-type controllers on an AT or higher, AH=0Fh should be called first SeeAlso: AH=05h"FLOPPY",AH=06h,AH=07h,AH=0Fh,AH=18h,AH=1Ah ----------1306------------------------------- INT 13 - FIXED DISK - FORMAT TRACK AND SET BAD SECTOR FLAGS (XT,PORT) AH = 06h AL = interleave value CH = cylinder number (bits 8,9 in high bits of CL) CL = sector number DH = head DL = drive Return: AH = status code (see AH=01h) Notes: AWARD AT BIOS extended to handle more than 1024 cylinders by placing bits 10 and 11 of the cylinder number into bits 6 and 7 of DH apparently, the AMI BIOS also follows this convention ----------1307------------------------------- INT 13 - FIXED DISK - FORMAT DRIVE STARTING AT GIVEN TRACK (XT,PORT) AH = 07h AL = interleave value (XT only) ES:BX = 512-byte format buffer (see AH=05h) CH = cylinder number (bits 8,9 in high bits of CL) CL = sector number DH = head DL = drive Return: AH = status code (see AH=01h) Note: AWARD AT BIOS extended to handle more than 1024 cylinders by placing bits 10 and 11 of the cylinder number into bits 6 and 7 of DH apparently, the AMI BIOS also follows this convention SeeAlso: AH=1Ah ----------1308------------------------------- INT 13 - DISK - GET DRIVE PARAMETERS (PC,XT286,CONV,PS) AH = 08h DL = drive (bit 7 set for hard disk) Return: CF set on error AH = status (07h) (see AH=01h) CF clear if successful AH = 00h BL = drive type (see AH=17h) (AT/PS2 floppies only) CH = low eight bits of maximum cylinder number CL = maximum sector number (bits 5-0) high two bits of maximum cylinder number (bits 7-6) DH = maximum head number DL = number of drives ES:DI -> drive parameter table (floppies only) Note: may return successful even though specified drive is greater than the number of attached drives of that type (floppy/hard); check DL to ensure validity SeeAlso: INT 1E,INT 41 ----------1309------------------------------- INT 13 - HARD DISK - INITIALIZE CONTROLLER WITH DRIVE PARAMETERS (AT,PS) AH = 09h DL = drive (80h for first, 81h for second) Return: CF clear if successful CF set on error AH = status (see AH=01h) Notes: on the PC and XT, this function uses the parameter table pointed at by INT 41 on the AT and later, this function uses the parameter table pointed at by INT 41 if DL=80h, and the parameter table pointed at by INT 46 if DL=81h SeeAlso: INT 41,INT 46 ----------130A------------------------------- INT 13 - HARD DISK - READ LONG SECTOR(S) (AT and later) AH = 0Ah AL = number of sectors CH = low eight bits of cylinder number CL = sector number (bits 5-0) high two bits of cylinder number (bits 7-6) DH = head number DL = drive number (80h = first, 81h = second) ES:BX -> data buffer Return: CF clear if successful CF set on error AH = status (see AH=01h) AL = number of sectors transferred Notes: this function reads in four to seven bytes of error-correcting code along with each sector's worth of information data errors are not automatically corrected, and the read is aborted after the first sector with an ECC error used for diagnostics only on PS/2 systems SeeAlso: AH=02h,AH=0Bh ----------130B------------------------------- INT 13 - HARD DISK - WRITE LONG SECTOR(S) (AT and later) AH = 0Bh AL = number of sectors CH = low eight bits of cylinder number CL = sector number (bits 5-0) high two bits of cylinder number (bits 7-6) DH = head number DL = drive number (80h = first, 81h = second) ES:BX -> data buffer Return: CF clear if successful CF set on error AH = status (see AH=01h) AL = number of sectors transferred Notes: each sector's worth of data must be followed by four to seven bytes of error-correction information used for diagnostics only on PS/2 systems SeeAlso: AH=03h,AH=0Ah ----------130C------------------------------- INT 13 - HARD DISK - SEEK TO CYLINDER AH = 0Ch CH = low eight bits of cylinder number CL = sector number (bits 5-0) high two bits of cylinder number (bits 7-6) DH = head number DL = drive number (80h = first, 81h = second hard disk) Return: CF set on error CF clear if successful AH = status (see AH=01h) SeeAlso: AH=00h,AH=02h,AH=0Ah ----------130D------------------------------- INT 13 - HARD DISK - RESET HARD DISKS AH = 0Dh DL = drive number (80h = first, 81h = second hard disk) Return: CF set on error CF clear if successful AH = status (see AH=01h) Notes: reinitializes the hard disk controller, resets the specified drive's parameters, and recalibrates the drive's heads (seek to track 0) not for PS/2 ESDI drives SeeAlso: AH=00h,INT 21/AH=0Dh ----------130E------------------------------- INT 13 - HARD DISK - READ SECTOR BUFFER (XT only) AH = 0Eh DL = drive number (80h = first, 81h = second hard disk) ES:BX -> buffer Return: CF set on error CF clear if successful AH = status code (see AH=01h) Notes: transfers controller's sector buffer. No data is read from the drive used for diagnostics only on PS/2 systems SeeAlso: AH=0Ah ----------130F------------------------------- INT 13 - HARD DISK - WRITE SECTOR BUFFER (XT only) AH = 0Fh DL = drive number (80h = first, 81h = second hard disk) ES:BX -> buffer Return: CF set on error CF clear if successful AH = status code (see AH=01h) Notes: does not write data to the drive should be called before formatting to initialize an XT-type controller's sector buffer used for diagnostics only on PS/2 systems SeeAlso: AH=0Bh ----------1310------------------------------- INT 13 - HARD DISK - CHECK IF DRIVE READY AH = 10h DL = drive number (80h = first, 81h = second hard disk) Return: CF set on error CF clear if successful AH = status (see AH=01h) ----------1311------------------------------- INT 13 - HARD DISK - RECALIBRATE DRIVE AH = 11h DL = drive number (80h = first, 81h = second hard disk) Return: CF set on error CF clear if successful AH = status (see AH=01h) Note: causes hard disk controller to seek the specified drive to cylinder 0 SeeAlso: AH=00h,AH=0Ch,AH=19h"FIXED DISK" ----------1312------------------------------- INT 13 - HARD DISK - CONTROLLER RAM DIAGNOSTIC (XT,PS) AH = 12h DL = drive number (80h = first, 81h = second hard disk) Return: CF set on error CF clear if successful AH = status code (see AH=01h) SeeAlso: AH=13h,AH=14h ----------1312------------------------------- INT 13 - Future Domain SCSI CONTROLLER - STOP SCSI DISK AH = 12h DL = hard drive ID Return: CF set on error AH = status code (see AH=01h) Notes: available at least on the TMC-870 8-bit SCSI controller BIOS v6.0A if the given drive is a SCSI device, the SCSI Stop Unit command is sent and either "Disk prepared for shipping" or "Disk Stop command failed" is displayed ----------1313------------------------------- INT 13 - HARD DISK - DRIVE DIAGNOSTIC (XT,PS) AH = 13h DL = drive number (80h = first, 81h = second hard disk) Return: CF set on error CF clear if successful AH = status code (see AH=01h) SeeAlso: AH=12h,AH=14h ----------1314------------------------------- INT 13 - HARD DISK - CONTROLLER INTERNAL DIAGNOSTIC AH = 14h Return: CF set on error CF clear if successful AH = status code (see AH=01h) SeeAlso: AH=12h,AH=13h ----------1315------------------------------- INT 13 - DISK - GET DISK TYPE (XT 1/10/86 or later,XT286,AT,PS) AH = 15h DL = drive number (bit 7 set for hard disk) Return: CF clear if successful AH = type code 00h no such drive 01h floppy without change-line support 02h floppy with change-line support 03h hard disk CX:DX = number of 512-byte sectors CF set on error AH = status (see AH=01h) SeeAlso: AH=16h,AH=17h,AH=19h"SCSI" ----------1316------------------------------- INT 13 - FLOPPY DISK - DETECT DISK CHANGE (XT 1/10/86 or later,XT286,AT,PS) AH = 16h DL = drive number Return: CF clear if change line inactive AH = 00h (disk not changed) CF set if change line active AH = 06h change line active or not supported = 80h drive not ready or not present Note: call AH=15h first to determine whether the drive supports a change line SeeAlso: AH=15h ----------1317------------------------------- INT 13 - FLOPPY DISK - SET DISK TYPE FOR FORMAT (AT,PS) AH = 17h AL = format type 01h = 320/360K disk in 360K drive 02h = 320/360K disk in 1.2M drive 03h = 1.2M disk in 1.2M drive 04h = 720K disk in 720K drive DL = drive number Return: CF set on error CF clear if successful AH = status (see AH=01h) Note: this function does not handle 1.44M drives; use AH=18h instead SeeAlso: AH=15h,AH=18h ----------1318------------------------------- INT 13 - DISK - SET MEDIA TYPE FOR FORMAT (AT model 3x9,XT2,XT286,PS) AH = 18h DL = drive number CH = lower 8 bits of number of tracks CL = sectors per track (bits 0-5) top 2 bits of number of tracks (bits 6,7) Return: AH = status 00h requested combination supported 01h function not available 0Ch not supported or drive type unknown 80h there is no disk in the drive ES:DI -> 11-byte parameter table SeeAlso: AH=05h,AH=07h,AH=17h ----------1318------------------------------- INT 13 - Future Domain SCSI BIOS - GET SCSI CONTROLLER INFORMATION AH = 18h DL = hard drive ID Return: CF set on error AH = status code (see AH=01h) CF clear if successful AX = 4321h (magic number???) BH = number of SCSI drives connected BL = SCSI device number for specified drive CX = 040Ah (magic number???) Note: also sets an internal flag (non-resettable) which prevents some controller messages from being displayed and allows writes to removable devices SeeAlso: AH=1Bh"SCSI" ----------1319------------------------------- INT 13 - FIXED DISK - PARK HEADS (XT286,PS) AH = 19h DL = drive Return: CF set on error AH = status (see AH=01h) SeeAlso: AH=11h ----------1319------------------------------- INT 13 - Future Domain SCSI CONTROLLER - REINITIALIZE DRIVE AH = 19h DL = hard drive ID Return: CF set on error AH = status code (see AH=01h) CF clear if successful AH = disk type (03h = fixed disk) CX:DX = number of 512-byte sectors Notes: sends SCSI Read Capacity command to get number of logical blocks and adjusts the result for 512-byte sectors displays either "Error in Read Capacity Command" or "nnn Bytes per sector" (nnn=256 or 512, the only sizes supported in the translation code) should probably be called when a removable device has its media changed returns the same values as AH=15h SeeAlso: AH=15h,AH=1Ah ----------131A------------------------------- INT 13 - ESDI FIXED DISK - FORMAT UNIT (PS) AH = 1Ah AL = defect table count CL = format modifiers bit 4: generate periodic interrupt bit 3: perform surface analysis bit 2: update secondary defect map bit 1: ignore secondary defect map bit 0: ignore primary defect map DL = drive ES:BX -> defect table Return: CF set on error AH = status (see AH=01h) Note: if periodic interrupt selected, INT 15h/AH=0Fh is called after each cylinder is formatted SeeAlso: AH=07h,INT 15/AH=0Fh ----------131A------------------------------- INT 13 - Future Domain SCSI CONTROLLER - GET SCSI PARTIAL MEDIUM CAPACITY AH = 1Ah CH = track (bits 8,9 in high bits of CL) CL = sector (01h to number of sectors/track for drive) DH = head DL = hard drive ID Return: CF set on error AH = status code (see AH=01h) CX:DX = logical block number of last quickly-accessible block after given block Note: sends SCSI Read Capacity command with the PMI bit set to obtain the logical block address of the last block after which a substantial delay in data transfer will be encountered (usually the last block on the current cylinder). No translation to 512 byte sectors is performed on the result if data is stored on the disk in other than 512 byte sectors. SeeAlso: AH=15h,AH=19h"SCSI" ----------131B------------------------------- INT 13 - ESDI FIXED DISK - GET MANUFACTURING HEADER AH = 1Bh AL = number of record DL = drive ES:BX -> buffer for manufacturing header (defect list) Return: CF set on error AH = status Note: manufacturing header format (Defect Map Record format) can be found in IBM 70MB, 115MB Fixed Disk Drives Technical Reference ----------131B------------------------------- INT 13 - Future Domain SCSI CONTROLLER - GET POINTER TO SCSI DISK INFO BLOCK AH = 1Bh DL = hard drive ID Return: CF set on error AH = status code (see AH=01h) CF clear if successful ES:BX -> SCSI disk information block Note: also sets a non-resettable flag which prevents some controller messages from being displayed SeeAlso: AH=18h"SCSI",AH=1Ch"SCSI" Format of SCSI disk information block: Offset Size Description 00h BYTE drive physical information bit 0: ??? bit 1: device uses parity bit 2: 256 bytes per sector instead of 512 bit 3: don't have capacity yet??? bit 4: disk is removable bit 5: logical unit number is not present 01h WORD translated number of cylinders 03h BYTE translated number of heads 04h BYTE translated number of sectors per track (17, 34, or 63) 05h BYTE drive address bits 0-2: logical unit number bits 3-5: device number 06h BYTE 01h at initialization 07h BYTE sense code byte 00h, or extended sense code byte 0Ch 08h BYTE 00h 09h BYTE 00h or extended sense code byte 02h (sense key) 0Ah BYTE 00h 0Bh 10 BYTEs copy of Command Descriptor Block (CDB) 15h DWORD translated number of sectors on device ----------131C------------------------------- INT 13 - Future Domain SCSI CONTROLLER - GET POINTER TO FREE CONTROLLER RAM AH = 1Ch DL = hard drive ID (any valid SCSI hard disk) Return: CF set on error AH = status code (see AH=01h) CF clear if successful ES:BX -> first byte of free RAM on controller Notes: the Future Domain TMC-870 contains 1024 bytes of RAM at offsets 1800h to 1BFFh on-bard the controller for storing drive information and controller status; ES:BX points to the first byte available for other uses ES contains the segment at which the controller resides; the controller's two memory-mapped I/O ports are at offsets 1C00h, 1E00h SeeAlso: AH=1Bh"SCSI" ----------131C0A----------------------------- INT 13 - ESDI FIXED DISK - GET DEVICE CONFIGURATION AX = 1C0Ah DL = drive ES:BX -> buffer for device configuration (drive physical parameter) Return: CF set on error AH = status Note: device configuration format can be found in IBM ESDI Fixed Disk Drive Adapter/A Technical Reference ----------131C0B----------------------------- INT 13 - ESDI FIXED DISK - GET ADAPTER CONFIGURATION AX = 1C0Bh ES:BX -> buffer for adapter configuration Return: CF set on error AH = status SeeAlso: AX=1C0Ch ----------131C0C----------------------------- INT 13 - ESDI FIXED DISK - GET POS INFORMATION AX = 1C0Ch ES:BX -> POS information Return: CF set on error AH = status SeeAlso: AX=1C0Bh ----------131C0E----------------------------- INT 13 - ESDI FIXED DISK - TRANSLATE RBA TO ABA AX = 1C0Eh CH = low 8 bits of cylinder number CL = sector number, high two bits of cylinder number in bits 6 and 7 DH = head number DL = drive number ES:BX -> ABA number Return: CF set on error AH = status Note: ABA (absolute block address) format can be found in IBM ESDI Adapter Technical Reference by using its Device Configuration Status Block ----------131D------------------------------- INT 13 - IBMCACHE.SYS - CACHE STATUS AH = 1Dh AL = subfunction 01h get status record DL = drive??? Return: ES:BX -> status record CF set on error AH = error code 02h set cache status ES:BX -> status record DL = drive??? Return: CF set on error Format of status record: Offset Size Description 00h DWORD total number of read requests 04h DWORD total number of hits 08h DWORD number of physical disk reads 0Ch DWORD total number of sectors requested by physical disk reads 10h 6 bytes ??? 16h DWORD pointer to start of error list 1Ah DWORD pointer to end of error list 1Eh WORD ??? 20h BYTE using extended memory if nonzero 21h BYTE ??? 22h 4 BYTEs ASCII version number 26h WORD cache size in K 28h WORD sectors per page Format of error list: Offset Size Description 00h DWORD relative block address of bad page 04h BYTE drive 05h BYTE sector bit-map 06h WORD next error ----------1320------------------------------- INT 13 - DISK - ??? (Western Digital "Super BIOS") AH = 20h ??? Return: ??? Note: seems to return some kind of status ----------1320FF----------------------------- INT 13 - QCACHE - DISMOUNT AX = 20FFh Return: ??? ----------1321------------------------------- INT 13 - QCACHE - FLUSH CACHE AH = 21h Return: ??? SeeAlso: AH=25h,AH=2Eh ----------1322------------------------------- INT 13 - QCACHE - ENABLE/DISABLE CACHE AH = 22h AL = 00h disable cache 01h enable cache ----------1324------------------------------- INT 13 - QCACHE - SET SECTORS AH = 24h BX = number of sectors Return: ??? ----------1325------------------------------- INT 13 - QCACHE - SET FLUSH INTERVAL AH = 25h BC = interval Return: ??? SeeAlso: AH=21h,AH=2Eh ----------1327--BX0000----------------------- INT 13 - QCACHE - INSTALLATION CHECK AH = 27h BX = 0000h Return: BX nonzero if installed ----------132A------------------------------- INT 13 - QCACHE - SET BUFFER SIZE AH = 2Ah AL = buffer size Return: ??? ----------132C------------------------------- INT 13 - QCACHE - SET BUFFERED WRITES AH = 2Ch AL = state 00h disable 01h enable Return: ??? SeeAlso: AH=2Dh ----------132D------------------------------- INT 13 - QCACHE - SET BUFFERED READ AH = 2Dh AL = state 00h disable 01h enable Return: ??? SeeAlso: AH=2Ch ----------132E------------------------------- INT 13 - QCACHE - SET FLUSH COUNT AH = 2Eh BX = flush count Return: ??? SeeAlso: AH=21h,AH=25h ----------1330------------------------------- INT 13 - QCACHE - GET INFO AH = 30h AL = what to get 00h system info 01h drive info DS:DX -> buffer for info Return: ??? ----------1370------------------------------- INT 13 - Priam EDVR.SYS DISK PARTITIONING SOFTWARE??? AH = 70h ??? Return: ??? Note: Priam's EDISK.EXE (FDISK replacement) and EFMT.EXE (low-level formatting program) make this call, presumably to EDVR.SYS (the partitioning driver) SeeAlso: AH=ADh ----------1375------------------------------- INT 13 - ??? AH = 75h ??? Return: AH = ??? ??? Note: intercepted by PC-Cache (v5.1 only) ----------1376------------------------------- INT 13 - ??? AH = 76h ??? Return: AH = ??? ??? Note: intercepted by PC-Cache (v5.1 only) ----------1381--SI4358----------------------- INT 13 - Super PC Kwik/PC-Cache 5.x - ??? AH = 81h SI = 4358h ??? Return: ??? Note: PC Tools PC-Cache 5.x is an OEM version of Super PC Kwik, and thus supports this call returns immediately in PC-Cache v5.x ----------1382--SI4358----------------------- INT 13 - Super PC Kwik/PC-Cache 5.x - ??? AH = 82h SI = 4358h ??? Return: AL = ??? Note: PC Tools PC-Cache 5.x is an OEM version of Super PC Kwik, and thus supports this call SeeAlso: AH=84h ----------1383--SI4358----------------------- INT 13 - Super PC Kwik/PC-Cache 5.x - ??? AH = 83h SI = 4358h AL = ??? ES:BX -> ??? ??? Return: ??? Note: PC Tools PC-Cache 5.x is an OEM version of Super PC Kwik, and thus supports this call SeeAlso: AH=85h ----------1384--SI4358----------------------- INT 13 - Super PC Kwik/PC-Cache 5.x - ??? AH = 84h SI = 4358h AL = ??? ??? Return: AL = ??? Note: PC Tools PC-Cache 5.x is an OEM version of Super PC Kwik, and thus supports this call SeeAlso: AH=82h ----------1385--SI4358----------------------- INT 13 - Super PC Kwik/PC-Cache 5.x - ??? AH = 85h SI = 4358h AL = ??? DL = ??? ??? Return: ??? Note: PC Tools PC-Cache 5.x is an OEM version of Super PC Kwik, and thus supports this call SeeAlso: AH=83h ----------138EED----------------------------- INT 13 - HyperDisk 4.01+ - ??? AX = 8EEDh ??? Return: ??? Note: HyperDisk is a shareware disk cache by HyperWare (Roger Cross) SeeAlso: AX=8EEEh,AX=8EEFh,AH=EEh,INT 2F/AH=DFh ----------138EEE----------------------------- INT 13 - HyperDisk 4.01+ - ??? AX = 8EEEh Return: CF set AX = CS of HyperDisk resident code ??? Note: identical to AX=8EEFh in HYPERDKX v4.21 SeeAlso: AX=8EEDh,AX=8EEFh,AH=EEh ----------138EEF----------------------------- INT 13 - HyperDisk 4.01+ - ??? AX = 8EEFh Return: CF set AX = CS of HyperDisk resident code ??? Note: identical to AX=8EEEh in HYPERDKX v4.21 SeeAlso: AX=8EEDh,AX=8EEEh,AH=EEh ----------13A0--SI4358----------------------- INT 13 - Super PC Kwik - GET RESIDENT CODE SEGMENT AH = A0h SI = 4358h Return: AX = segment of resident code Note: PC Tools PC-Cache 5.x is an OEM version of Super PC Kwik, and thus supports this call SeeAlso: INT 16/AX=FFA5h/CX=1111h ----------13A1--SI4358----------------------- INT 13 - Super PC Kwik - FLUSH CACHE AH = A1h SI = 4358h Note: PC Tools PC-Cache 5.x is an OEM version of Super PC Kwik, and thus supports this call SeeAlso: INT 16/AX=FFA5h/CX=FFFFh ----------13A2--SI4358----------------------- INT 13 - Super PC Kwik - ??? AH = A2h SI = 4358h ??? Return: ??? Note: PC Tools PC-Cache 5.x is an OEM version of Super PC Kwik, and thus supports this call ----------13AD------------------------------- INT 13 - Priam HARD DISK CONTROLLER??? AH = ADh ??? Return: ??? Note: this call is made from Priam's EFMT.EXE (low-level formatter), probably to check the ROM type on the controller for their hard disk kits SeeAlso: AH=70h ----------13B0--SI4358----------------------- INT 13 - Super PC Kwik - ??? AH = B0h SI = 4358h ??? Return: ??? Note: PC Tools PC-Cache 5.x is an OEM version of Super PC Kwik, and thus supports this call ----------13EE------------------------------- INT 13 - SWBIOS - SET 1024 CYLINDER FLAG AH = EEh DL = drive number (80h, 81h) Return: CF clear AH = 00h Notes: the following INT 13 call will interpret the cylinder number as 1024 less than the desired cylinder flag cleared by all INT 13 calls except AH=EEh SWBIOS is a TSR by Ontrack Computer Systems; Disk Manager also supports these calls also supported by HyperDisk v4.01+ and PC-Cache v5.5+, in order to allow caching of drives using SWBIOS to access more than 1024 cylinders SeeAlso: AH=F9h,AH=FEh,INT 16/AX=FFA5h/CX=1111h,INT 2F/AH=DFh ----------13F9------------------------------- INT 13 - SWBIOS - INSTALLATION CHECK AH = F9h DL = drive number (80h,81h) Return: CF clear DX = configuration word bit 15 set if other SWBIOS extensions available CF set on error Note: SWBIOS is a TSR by Ontrack Computer Systems; Disk Manager also supports these calls SeeAlso: AH=EEh ----------13FE------------------------------- INT 13 - SWBIOS - GET EXTENDED CYLINDER COUNT AH = FEh DL = drive number (80h, 81h) Return: CF clear DX = number of cylinders beyond 1024 on drive Notes: standard INT 13/AH=08h will return a cylinder count truncated to 1024 BIOS without this extension would return count modulo 1024 SWBIOS is a TSR by Ontrack Computer Systems; Disk Manager also supports these calls SeeAlso: AH=EEh ----------1400------------------------------- INT 14 - SERIAL - INITIALIZE PORT AH = 00h AL = port parameters bits 7-5 data rate (110,150,300,600,1200,2400,4800,9600 bps) bits 4-3 parity (00 or 10 = none, 01 = odd, 11 = even) bit 2 stop bits (set = 2, clear = 1) bits 1-0 data bits (00 = 5, 01 = 6, 10 = 7, 11 = 8) DX = port number (00h-03h) Return: AH = line status (see AH=03h) AL = modem status (see AH=03h) Notes: default handler is at F000h:E739h in IBM PC and 100% compatible BIOSes since the PCjr supports a maximum of 4800 bps, attempting to set 9600 bps will result in 4800 bps SeeAlso: AH=04h"SERIAL",AH=04h"MultiDOS",AH=05h"SERIAL",AH=82h,AH=8Ch ----------1400------------------------------- INT 14 - FOSSIL (Fido/Opus/Seadog Standard Interface Level) - INITIALIZE AH = 00h AL = initializing parameters 7 - 6 - 5 4 - 3 2 1 - 0 -BAUD RATE- PARITY STOP WORD BITS LENGTH 000 19200 bd 00 none 0: 1 00: 5 001 38400 bd 01 odd 1: 2 01: 6 010 300 bd 11 even 10: 7 011 600 bd 11: 8 100 1200 bd 101 2400 bd 110 4800 bd 111 9600 bd (4800 on PCjr) DX = port number (0-3 or FFh if only performing non-I/O setup) Return: AH = RS-232 status code bits 0: RDA - input data is available in buffer 1: OVRN - data has been lost 5: THRE - room is available in output buffer 6: TSRE - output buffer empty AL = modem status bits 3: always 1 7: DCD - carrier detect SeeAlso: AH=05h"FOSSIL",AH=82h ----------1401------------------------------- INT 14 - SERIAL - WRITE CHARACTER TO PORT AH = 01h AL = character to write DX = port number (00h-03h) Return: AH bit 7 clear if successful AH bit 7 set on error AH bits 6-0 = port status (see AH=03h) SeeAlso: AH=02h,AH=0Bh,AH=89h ----------1402------------------------------- INT 14 - SERIAL - READ CHARACTER FROM PORT AH = 02h DX = port number (00h-03h) Return: AH = line status (see AH=03h) AL = received character if AH bit 7 clear Note: will timeout if DSR is not asserted, even if function 03h returns data ready SeeAlso: AH=01h,AH=02h"FOSSIL",AH=84h,AH=FCh ----------1402------------------------------- INT 14 - FOSSIL - RECEIVE CHARACTER WITH WAIT AH = 02h DX = port number (0-3) Return: AL = character received AH = 00h SeeAlso: AH=01h,AH=02h"SERIAL" ----------1403------------------------------- INT 14 - SERIAL - GET PORT STATUS AH = 03h DX = port number (00h-03h) Return: AH = line status bit 7: timeout 6: transmit shift register empty 5: transmit holding register empty 4: break detected 3: framing error 2: parity error 1: overrun error 0: receive data ready AL = modem status bit 7: carrier detect 6: ring indicator 5: data set ready 4: clear to send 3: delta carrier detect 2: trailing edge of ring indicator 1: delta data set ready 0: delta clear to send SeeAlso: AH=00h,AH=07h"MultiDOS",AH=81h"COURIERS",AX=FD02h ----------1404------------------------------- INT 14 - SERIAL I/O - EXTENDED INITIALIZE (CONVERTIBLE,PS) AH = 04h AL = break status 00h if break 01h if no break BH = parity 00h no parity 01h odd parity 02h even parity 03h stick parity odd 04h stick parity even BL = number of stop bits 00h one stop bit 01h two stop bits (1.5 if 5 bit word length) CH = word length 00h 5 bits 01h 6 bits 02h 7 bits 03h 8 bits CL = bps rate 00h 110 01h 150 02h 300 03h 600 04h 1200 05h 2400 06h 4800 07h 9600 08h 19200 DX = port number Return: AX = port status code (see AH=00h) SeeAlso: AH=00h,AH=1Eh ----------1404------------------------------- INT 14 - FOSSIL - INITIALIZE DRIVER AH = 04h DX = port number optionally BX=4F50h ES:CX -> byte to be set upon ^C Return: AX = 1954h (if successful) BL = maximum function number supported (excluding 7Eh and above) BH = revision of FOSSIL supported DTR is raised Note: the word at offset 6 in the interrupt handler contains 1954h, and the following byte contains the maximum function number supported SeeAlso: AH=05h"FOSSIL",AH=1Ch ----------1404------------------------------- INT 14 - MultiDOS Plus IODRV - INITIALIZE PORT AH = 04h Return: port initialized; if Hayes-compatible modem, a connection has been established Note: the port number is stored at offset BEh in the Task Control Block (see INT 15/AH=13h"MultiDOS") SeeAlso: AH=00h,AH=05h"MultiDOS",AH=20h"MultiDOS",INT 15/AH=13h"MultiDOS" ----------1405------------------------------- INT 14 - SERIAL I/O - EXTENDED COMMUNICATION PORT CONTROL (CONVERTIBLE,PS) AH = 05h AL = 00h read modem control register Return: BL = modem control register (see below) AH = status AL = 01h write modem control register BL = modem control register bit 0: data terminal ready bit 1: request to send bit 2: OUT1 bit 3: OUT2 bit 4: LOOP bits 5-7 reserved Return: AX = status DX = port number SeeAlso: AH=00h,AH=1Fh ----------1405------------------------------- INT 14 - FOSSIL - DEINITIALIZE DRIVER AH = 05h DX = port number Return: none DTR is not affected SeeAlso: AH=00h,AH=04h"FOSSIL",AH=1Dh,AH=8Dh ----------1405------------------------------- INT 14 - MultiDOS Plus IODRV - READ CHARACTER FROM PORT AH = 05h AL = timeout in seconds (00h = never) Return: AL = status 00h successful AH = character read 01h read error 02h timed out other modem status (CTS, DSR) changed Note: the port number is stored at offset BEh in the Task Control Block SeeAlso: AH=02h,AH=04h"MultiDOS",AH=06h"MultiDOS",AH=22h"MultiDOS" SeeAlso: INT 15/AH=13h"MultiDOS" ----------1406------------------------------- INT 14 - FOSSIL - RAISE/LOWER DTR AH = 06h DX = port AL = DTR state to be set 00h = lower 01h = raise SeeAlso: AH=1Ah ----------1406------------------------------- INT 14 - MultiDOS Plus IODRV - WRITE CHARACTER TO PORT AH = 06h AL = character Return: AL = status 00h successful Notes: the port number is stored at offset BEh in the Task Control Block if output queue is full, the calling task is blocked until the character can be stored SeeAlso: AH=01h,AH=04h"MultiDOS",AH=05h"MultiDOS",AH=21h"MultiDOS" SeeAlso: INT 15/AH=13h"MultiDOS" ----------1407------------------------------- INT 14 - FOSSIL - RETURN TIMER TICK PARAMETERS AH = 07h Return: AL = timer tick interrupt number AH = ticks per second on interrupt number in AL DX = approximate number of milliseconds per tick SeeAlso: AH=16h ----------1407------------------------------- INT 14 - MultiDOS Plus IODRV - GET PORT STATUS AH = 07h Return: CL = modem status (see AH=03h) CH = character at head of input queue (if any) DX = number of characters in input queue Note: the port number is stored at offset BEh in the Task Control Block SeeAlso: AH=03h,AH=05h"MultiDOS",AH=08h"MultiDOS",AH=09h"MultiDOS" SeeAlso: AH=23h"MultiDOS",INT 15/AH=13h"MultiDOS" ----------1408------------------------------- INT 14 - FOSSIL - FLUSH OUTPUT BUFFER WAITING TILL ALL OUTPUT IS DONE AH = 08h DX = port number SeeAlso: AH=09h"FOSSIL" ----------1408------------------------------- INT 14 - MultiDOS Plus 4.0 IODRV - GET AND RESET PORT LINE STATUS AH = 08h Return: AL = line status (see AH=03h) AH destroyed Notes: the port number is stored at offset BEh in the Task Control Block on every line status change, the line status is ORed with the line status accumulator; this function returns the accumulator and clears it SeeAlso: AH=03h,AH=04h"MultiDOS",AH=07h"MultiDOS",INT 15/AH=13h"MultiDOS" ----------1409------------------------------- INT 14 - FOSSIL - PURGE OUTPUT BUFFER THROWING AWAY ALL PENDING OUTPUT AH = 09h DX = port number SeeAlso: AH=08h"FOSSIL",AH=0Ah"FOSSIL",AH=88h ----------1409------------------------------- INT 14 - MultiDOS Plus IODRV - RESET PORT STATUS AH = 09h Return: modem status byte cleared Note: the port number is stored at offset BEh in the Task Control Block SeeAlso: AH=04h"MultiDOS",AH=07h"MultiDOS",INT 15/AH=13h"MultiDOS" ----------140A------------------------------- INT 14 - FOSSIL - PURGE INPUT BUFFER THROWING AWAY ALL PENDING INPUT AH = 0Ah DX = port number SeeAlso: AH=09h"FOSSIL",AH=85h ----------140B------------------------------- INT 14 - FOSSIL - TRANSMIT NO WAIT AH = 0Bh AL = character DX = port number Return: AX = 0000h character not accepted = 0001h character accepted SeeAlso: AH=01h ----------140C------------------------------- INT 14 - FOSSIL - NON-DESTRUCTIVE READ AHEAD AH = 0Ch DX = port number Return: AX = FFFFh character not available AX = 00xxh character xx available SeeAlso: AH=20h"FOSSIL" ----------140D------------------------------- INT 14 - FOSSIL - KEYBOARD READ WITHOUT WAIT AH = 0Dh Return: AX = FFFFh character not available = xxyyh standard IBM-style scan code SeeAlso: AH=0Eh ----------140E------------------------------- INT 14 - FOSSIL - KEYBOARD READ WITH WAIT AH = 0Eh Return: AX = xxyyh standard IBM-style scan code SeeAlso: AH=0Dh ----------140F------------------------------- INT 14 - FOSSIL - ENABLE/DISABLE FLOW CONTROL AH = 0Fh AL = bit mask describing flow control requested 0: xon/xoff on transmit (watch for xoff while sending) 1: CTS/RTS (CTS on transmit/RTS on receive) 2: reserved 3: xon/xoff on receive (send xoff when buffer near full) 4-7: all 1 DX = port number SeeAlso: AH=10h ----------1410------------------------------- INT 14 - FOSSIL - EXTENDED ^C/^K CHECKING AND TRANSMIT ON/OFF AH = 10h AL = bit mask 0: enable/disable ^C/^K checking 1: enable/disable the transmitter DX = port number SeeAlso: AH=0Fh ----------1411------------------------------- INT 14 - FOSSIL - SET CURRENT CURSOR LOCATION AH = 11h DH = row DL = column Note: this is the same as INT 10/AH=02h SeeAlso: AH=12h ----------1412------------------------------- INT 14 - FOSSIL - READ CURRENT CURSOR LOCATION AH = 12h Return: DH = row DL = column Note: this is the same as INT 10/AH=03h SeeAlso: AH=11h ----------1413------------------------------- INT 14 - FOSSIL - SINGLE CHARACTER ANSI WRITE TO SCREEN AH = 13h AL = character Note: should not be called if it is unsafe to call DOS SeeAlso: AH=15h ----------1414------------------------------- INT 14 - FOSSIL - ENABLE OR DISABLE WATCHDOG PROCESSING AH = 14h AL = 01h enable watchdog 00h disable watchdog DX = port number ----------1415------------------------------- INT 14 - FOSSIL - WRITE CHARACTER TO SCREEN USING BIOS SUPPORT ROUTINES AH = 15h AL = character SeeAlso: AH=13h ----------1416------------------------------- INT 14 - FOSSIL - INSERT/DELETE FUNCTION FROM TIMER TICK CHAIN AH = 16h AL = function 00h = delete 01h = add ES:DX -> routine to call Return: AX = status 0000h successful 0001h unsuccessful SeeAlso: AH=07h"FOSSIL" ----------1417------------------------------- INT 14 - FOSSIL - REBOOT SYSTEM AH = 17h AL = method 00h = cold boot 01h = warm boot SeeAlso: INT 19 ----------1418------------------------------- INT 14 - FOSSIL - READ BLOCK AH = 18h CX = maximum number of characters to transfer DX = port number ES:DI -> user buffer Return: AX = number of characters transferred SeeAlso: AH=19h,AH=83h,AX=FF02h,INT 6B/AX=0100h ----------1419------------------------------- INT 14 - FOSSIL - WRITE BLOCK AH = 19h CX = maximum number of characters to transfer DX = port number ES:DI -> user buffer Return: AX = number of characters transferred SeeAlso: AH=18h,AH=86h,INT 6B/AX=0000h ----------141A------------------------------- INT 14 - FOSSIL - BREAK BEGIN OR END AH = 1Ah AL = 00h stop sending 'break' 01h start sending 'break' DX = port number SeeAlso: AH=06h"FOSSIL",AH=8Ah,AH=FAh ----------141B------------------------------- INT 14 - FOSSIL - RETURN INFORMATION ABOUT THE DRIVER AH = 1Bh DX = port number CX = size of user buffer ES:DI -> user buffer for driver info (see below) Return: AX = number of characters transferred CX = 3058h ("0X") (X00 FOSSIL only) DX = 2030h (" 0") (X00 FOSSIL only) Format of driver info: Offset Size Description 00h WORD size of structure in bytes 02h BYTE FOSSIL spec driver conforms to 03h BYTE revision level of this specific driver 04h DWORD pointer to ASCIZ identification string 08h WORD size of the input buffer 0Ah WORD number of bytes left in buffer 0Ch WORD size of the output buffer 0Eh WORD number of bytes left in buffer 10h BYTE width of screen 11h BYTE length of screen 12h BYTE actual baud rate, computer to modem ----------141C------------------------------- INT 14 - X00 FOSSIL - ACTIVATE PORT AH = 1Ch DX = port number Return: AX = 1954h if successful BL = maximum function number supported (not including 7Eh and above) BH = revision of FOSSIL specification supported Note: this is a duplicate of AH=04h, so that AH=04h may be made compatible with the PS/2 BIOS in a future release SeeAlso: AH=04h"FOSSIL",AH=1Dh ----------141D------------------------------- INT 14 - X00 FOSSIL - DEACTIVATE PORT AH = 1Dh DX = port number Return: none Notes: this is a duplicate of AH=05h, so that AH=05h may be made compatible with the PS/2 BIOS in a future release ignored if the port was never activated with AH=04h or AH=1Ch SeeAlso: AH=05h"FOSSIL",AH=1Ch ----------141E------------------------------- INT 14 - X00 FOSSIL - EXTENDED LINE CONTROL INITIALIZATION AH = 1Eh AL = break status 00h if break 01h if no break BH = parity 00h no parity 01h odd parity 02h even parity 03h stick parity odd 04h stick parity even BL = number of stop bits 00h one stop bit 01h two stop bits (1.5 if 5 bit word length) CH = word length 00h 5 bits 01h 6 bits 02h 7 bits 03h 8 bits CL = bps rate 00h 110 01h 150 02h 300 03h 600 04h 1200 05h 2400 06h 4800 07h 9600 08h 19200 DX = port number Return: AX = port status code (see AH=00h) Notes: this function is intended to exactly emulate the PS/2 BIOS AH=04h call if the port was locked at X00 load time, the appropriate parameters are ignored SeeAlso: AH=00h,AH=04h"SERIAL I/O" ----------141F------------------------------- INT 14 - X00 FOSSIL - EXTENDED SERIAL PORT STATUS/CONTROL AH = 1Fh AL = 00h read modem control register Return: BL = modem control register (see below) AH = status AL = 01h write modem control register BL = modem control register bit 0: data terminal ready bit 1: request to send bit 2: OUT1 bit 3: OUT2 (interrupts) enabled bit 4: LOOP bits 5-7 reserved Return: AX = status DX = port number SeeAlso: AH=00h,AH=05h"SERIAL I/O" Notes: this function is intended to exactly emulate the PS/2 BIOS AH=05h call X00 forces BL bit 3 set (interrupts cannot be disabled) ----------1420------------------------------- INT 14 - X00 FOSSIL - DESTRUCTIVE READ WITH NO WAIT AH = 20h DX = port number Return: AH = 00h if character was available AL = next character (removed from receive buffer) AX = FFFFh if no character available SeeAlso: AH=0Ch,AH=21h"X00" ----------1420------------------------------- INT 14 - Alloy MW386 - ATTACH LOGICAL COMMUNICATIONS PORT TO PHYSICAL PORT AH = 20h AL = logical port (01h COM1, 02h COM2) DX = physical port number Return: AX = status 0000h successful FFFFh failed SeeAlso: AH=21h"Alloy",AH=22h"Alloy",AH=23h"Alloy",INT 17/AH=8Bh"Alloy" ----------1420------------------------------- INT 14 - MultiDOS Plus - INITIALIZE PORT AH = 20h AL = port parameters (see AH=00h"SERIAL") DX = port number (0-3) Return: AH = status 00h successful 41h no such port 64h monitor mode already active SeeAlso: AH=00h"SERIAL",AH=04h"MultiDOS",AH=21h"MultiDOS",AH=23h"MultiDOS" ----------1421------------------------------- INT 14 - X00 FOSSIL - STUFF RECEIVE BUFFER AH = 21h AL = character DX = port number Notes: the given character is inserted at the end of the receive buffer as if it had just arrived from the serial port; all normal receive processing (XON/XOFF, ^C/^K) is performed on the character fully re-entrant SeeAlso: AH=20h"X00" ----------1421------------------------------- INT 14 - Alloy MW386 v1.x only - RELEASE PHYSICAL COMMUNICATIONS PORT AH = 21h DX = physical port number Return: AX = status 0000h successful FFFFh failed SeeAlso: AH=20h"Alloy",AH=22h"Alloy" ----------1421------------------------------- INT 14 - MultiDOS Plus - TRANSMIT CHARACTER AH = 21h AL = character to send DX = port number Return: AH = status 00h successful 39h no DSR or CTS 3Ch no DSR 3Bh no CTS 41h no such port 42h monitor mode not active 97h timed out Note: monitor mode must have been turned on with AH=24h before calling SeeAlso: AH=20h"MultiDOS",AH=22h"MultiDOS",AH=24h"MultiDOS" ----------1422------------------------------- INT 14 - Alloy MW386 v2+ - RELEASE LOGICAL COMMUNICATIONS PORT AH = 22h AL = logical port (01h COM1, 02h COM2) Return: AX = status (0000h successful) SeeAlso: AH=20h"Alloy",AH=21h"Alloy" ----------1422------------------------------- INT 14 - MultiDOS Plus - RECEIVE CHARACTER AH = 22h DX = port number Return: AH = status (see also AH=21h"MultiDOS") 00h successful AL = character 3Dh framing and parity error 3Eh overrun error 3Fh framing error 40h parity error 96h ring buffer overflow Note: if no character is available, this function waits until a character arrives or an implementation-dependent timeout elapses SeeAlso: AH=20h"MultiDOS",AH=21h"MultiDOS",AH=27h ----------1423------------------------------- INT 14 - Alloy MW386 v2+ - GET PORT NUMBER FROM LOGICAL PORT ID AH = 23h AL = logical port (01h COM1, 02h COM2) DH = user ID DL = process ID (DH,DL both FFh for current task) Return: AL = MW386 port mode bit 0: port is shared (spooler only) 1: port is spooled instead of direct (spooler only) 2: port is assigned as logical COM device, not in spooler 3: port is free CX = MW386 port number DH = owner's user ID DL = owner's task ID SeeAlso: AH=20h"Alloy",INT 17/AH=8Bh"Alloy" ----------1423------------------------------- INT 14 - MultiDOS Plus - GET PORT STATUS AH = 23h DX = port number Return: AH = line status (see AH=03h) AL = modem status (see AH=03h) SeeAlso: AH=03h,AH=07h"MultiDOS",AH=20h"MultiDOS" ----------1424------------------------------- INT 14 - Alloy MW386 v2+ - CHANGE PHYSICAL PORT PARAMETERS AH = 24h CX = physical I/O port number DS:DX -> configuration table (see below) Return: AH = 00h Note: invalid port numbers are merely ignored SeeAlso: INT 17/AH=96h Format of configuration table: Offset Size Description 00h BYTE baud rate 00h 38400 01h 19200 02h 9600 03h 7200 04h 4800 05h 3600 06h 2400 07h 2000 08h 1200 09h 600 0Ah 300 0Bh 150 0Ch 134.5 01h BYTE data bits (00h=5, 01h=6, 02h=7, 03h=8) 02h BYTE parity (00h none, 01h odd, 02h even) 03h BYTE stop bits (00h=1, 01h=2) 04h BYTE receive flow control 00h none, 01h XON/XOFF, 02h DTR/DSR, 03h XPC, 04h RTS/CTS 05h BYTE transmit flow control (as for receive) ----------1424------------------------------- INT 14 - MultiDOS Plus - SET MONITOR MODE AH = 24h AL = port status storage 00h single status for entire receive buffer 01h separate status kept for each byte in receive buffer DX = port number Return: AH = status 00h successful 3Ah invalid status storage specified 41h no such port 64h monitor mode already active Note: in monitor mode, MultiDOS redirects all BIOS video output to a serial port SeeAlso: AH=20h"MultiDOS",AH=25h ----------1425------------------------------- INT 14 - MultiDOS Plus - CLEAR BUFFERS AH = 25h AL = function 00h only clear buffers 01h clear buffers and deactivate DX = port number Return: AH = status 00h successful 3Ah invalid function 41h no such port 42h monitor mode not active SeeAlso: AH=20h"MultiDOS",AH=24h"MultiDOS" ----------1427------------------------------- INT 14 - MultiDOS Plus - GET BUFFER CHARACTER COUNT AH = 27h DX = port number Return: AH = status 00h successful 41h no such port 42h monitor mode not active AL = number of characters in receive buffer ----------147E------------------------------- INT 14 - FOSSIL - INSTALL AN EXTERNAL APPLICATION FUNCTION AH = 7Eh AL = code assigned to external application (80h-BFh) 80h reserved for communications FOSSIL 81h video FOSSIL 82h reserved for keyboard FOSSIL 83h reserved for system FOSSIL ES:DX -> entry point Return: AX = 1954h BL = code assigned to application (same as input AL) DH = 00h failed 01h successful SeeAlso: AH=7Fh,AH=80h"FOSSIL",AX=8100h,AH=82h"FOSSIL",AH=83h"FOSSIL" ----------147F------------------------------- INT 14 - FOSSIL - REMOVE AN EXTERNAL APPLICATION FUNCTION AH = 7Fh AL = code assigned to external application ES:DX -> entry point Return: AX = 1954h BL = code assigned to application (same as input AL) DH = 00h failed 01h successful SeeAlso: AH=7Eh ----------1480------------------------------- INT 14 - COMMUNICATIONS FOSSIL AH = 80h SeeAlso: AH=7Eh ----------1480------------------------------- INT 14 - COURIERS.COM - INSTALLATION CHECK AH = 80h Return: AH = E8h if loaded Note: COURIERS is a TSR utility by PC Magazine ----------1481------------------------------- INT 14 - COURIERS.COM - CHECK IF PORT BUSY AH = 81h AL = port number (1-4) Return: AH = 00h port available 01h port exists but already in use 02h port nonexistent Note: COURIERS is a TSR utility by PC Magazine SeeAlso: AH=83h,AH=8Dh ----------148100----------------------------- INT 14 - VIDEO FOSSIL - RETURN VFOSSIL INFORMATION AX = 8100h ES:DI -> buffer for VFOSSIL information (see below) Return: AX = 1954h if installed SeeAlso: AH=7Eh,AX=8101h Format of VFOSSIL information: Offset Size Description 00h WORD size of information in bytes, including this field 02h WORD VFOSSIL major version 04h WORD VFOSSIL revision level 06h WORD highest VFOSSIL application function supported ----------148101----------------------------- INT 14 - VIDEO FOSSIL - OPEN VFOSSIL AX = 8101h ES:DI -> buffer for application function table (see below) CX = length of buffer in bytes Return: AX = 1954h if installed BH = highest VFOSSIL application function supported Note: the number of initialized pointers in the application function table will never exceed CX/4; if the buffer is large enough, BH+1 pointers will be initialized SeeAlso: AX=8102h Format of application function table: Offset Size Description 00h DWORD -> function to query current video mode (VioGetMode) 04h DWORD -> function to set video mode (VioSetMode) 08h DWORD -> function to query hardware config (VioGetConfig) 0Ch DWORD -> function to write data in TTY mode (VioWrtTTY) 10h DWORD -> function to get current ANSI state (VioGetANSI) 14h DWORD -> function to set new ANSI state (VioSetANSI) 18h DWORD -> function to get curr cursor position (VioGetCurPos) 1Ch DWORD -> function to set cursor position (VioSetCurPos) 20h DWORD -> function to get cursor shape (VioGetCurType) 24h DWORD -> function to set cursor shape (VioSetCurType) 28h DWORD -> function to scroll screen up (VioScrollUp) 2Ch DWORD -> function to scroll screen down (VioScrollDn) 30h DWORD -> function to read cell string from screen (VioReadCellStr) 34h DWORD -> function to read char string from screen (VioReadCharStr) 38h DWORD -> function to write a cell string (VioWrtCellStr) 3Ch DWORD -> function to write char string, leaving attr (VioWrtCharStr) 40h DWORD -> function to write char string,const attr (VioWrtCharStrAttr) 44h DWORD -> function to replicate an attribute (VioWrtNAttr) 48h DWORD -> function to replicate a cell (VioWrtNCell) 4Ch DWORD -> function to replicate a character (VioWrtNChar) Format of video mode data structure: Offset Size Description 00h WORD length of structure including this field 02h BYTE mode characteristics bit 0: clear if MDA, set otherwise bit 1: graphics mode bit 2: color disabled (black-and-white) 03h BYTE number of colors supported (1=2 colors, 4=16 colors, etc) 04h WORD number of text columns 06h WORD number of text rows 08h WORD reserved 0Ah WORD reserved 0Ch DWORD reserved Format of video configuration data: Offset Size Description 00h WORD structure length including this field 02h WORD adapter type 00h monochrome/printer 01h CGA 02h EGA 03h VGA 07h 8514/A 04h WORD display type 00h monochrome 01h color 02h enhanced color 09h 8514 06h DWORD adapter memory size Format of cursor type record: Offset Size Description 00h WORD cursor start line 02h WORD cursor end line 04h WORD cursor width (always 01h) 06h WORD cursor attribute (FFFFh = hidden) Call VioGetMode with: STACK: WORD VIO handle (must be 00h) DWORD pointer to video mode data structure (see above) Return: AX = error code (00h, 74h, 17Eh, 1B4h) 0000h successful 0074h internal VIO failure 0163h unsupported mode 0166h invalid row value 0167h invalid column value 017Eh buffer too small 01A5h invalid VIO parameter 01B4h invalid VIO handle Call VioSetMode with: STACK: WORD VIO handle (must be 00h) DWORD pointer to video mode data structure (see above) Return: AX = error code (00h, 74h, 163h, 17Eh, 1A5h, 1B4h) (see above) Call VioGetConfig with: STACK: WORD VIO handle (must be 00h) DWORD pointer to video configuration data buffer (see above) Return: AX = error code (00h, 74h, 17Eh, 1B4h) (see above) Call VioWrtTTY with: STACK: WORD VIO handle (must be 00h) WORD length of string DWORD pointer to character string to be written to screen Return: AX = error code (00h, 74h, 1B4h) (see above) Notes: write wraps at end of line and terminates if it reaches end of screen in ANSI mode, ANSI control sequences are interpreted, and this func is not required to be reentrant; in non-ANSI mode, the function is reentrant and may be called from within an MSDOS function call Call VioGetANSI with: STACK: WORD VIO handle (must be 00h) DWORD pointer to WORD which will be set to 00h if ANSI is off or 01h if ANSI is on Return: AX = error code (00h, 74h, 1B4h) (see above) Call VioSetANSI with: STACK: WORD VIO handle (must be 00h) DWORD pointer to WORD indicating new state of ANSI 00h off 01h on Return: AX = error code (00h, 74h, 1A4h, 1B4h) (see above) Call VioGetCurPos with: STACK: WORD VIO handle (must be 00h) DWORD pointer to WORD to hold current cursor column (0-based) DWORD pointer to WORD to hold current cursor row (0-based) Return: AX = error code (00h, 74h, 1B4h) (see above) Call VioSetCurPos with: STACK: WORD VIO handle (must be 00h) WORD cursor column WORD cursor row Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see above) Note: if either coordinate is invalid, the cursor is not moved Call VioGetCurType with: STACK: WORD VIO handle (must be 00h) DWORD pointer to cursor type record (see above) Return: AX = error code (00h, 74h, 1B4h) (see above) Call VioSetCurType with: STACK: WORD VIO handle (must be 00h) DWORD pointer to cursor type record (see above) Return: AX = error code (00h, 74h, 1A4h, 1B4h) (see above) Call VioScrollUp with: STACK: WORD VIO handle (must be 00h) DWORD pointer to char/attr cell for filling emptied rows WORD number or rows to scroll (FFFFh = clear area) WORD right column of scroll area WORD bottom row of scroll area WORD left column of scroll area WORD top row of scroll area Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see above) Call VioScrollDn with: STACK: WORD VIO handle (must be 00h) DWORD pointer to char/attr cell for filling emptied rows WORD number or rows to scroll (FFFFh = clear area) WORD right column of scroll area WORD bottom row of scroll area WORD left column of scroll area WORD top row of scroll area Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see above) Call VioReadCellStr with: STACK: WORD VIO handle (must be 00h) WORD column at which to start reading WORD row at which to start reading DWORD pointer to WORD containing length of buffer in bytes on return, WORD contains number of bytes actually read DWORD pointer to buffer for cell string Return: AX = error code (00h, 74h, 166h ,167h, 1B4h) (see above) Call VioReadCharStr with: STACK: WORD VIO handle (must be 00h) WORD column at which to start reading WORD row at which to start reading DWORD pointer to WORD containing length of buffer in bytes on return, WORD contains number of bytes actually read DWORD pointer to buffer for character string Return: AX = error code (00h, 74h, 166h ,167h, 1B4h) (see above) Call VioWrtCellStr with: STACK: WORD VIO handle (must be 00h) WORD column at which to start writing WORD row at which to start writing WORD length of cell string in bytes DWORD pointer to cell string to write Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see above) Note: write wraps at end of line and terminates if it reaches end of screen Call VioWrtCharStr with: STACK: WORD VIO handle (must be 00h) WORD column at which to start writing WORD row at which to start writing WORD length of character string DWORD pointer to character string to write Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see above) Note: write wraps at end of line and terminates if it reaches end of screen Call VioWrtCharStrAttr with: STACK: WORD VIO handle (must be 00h) DWORD pointer to attribute to be applied to each character WORD column at which to start writing WORD row at which to start writing WORD length of character string DWORD pointer to character string to write Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see above) Note: write wraps at end of line and terminates if it reaches end of screen Call VioWrtNAttr with: STACK: WORD VIO handle (must be 00h) WORD column at which to start writing WORD row at which to start writing WORD number of times to write attribute DWORD pointer to display attribute to replicate Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see above) Note: write wraps at end of line and terminates if it reaches end of screen Call VioWrtNCell with: STACK: WORD VIO handle (must be 00h) WORD column at which to start writing WORD row at which to start writing WORD number of times to write cell DWORD pointer to cell to replicate Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see above) Note: write wraps at end of line and terminates if it reaches end of screen Call VioWrtNChar with: STACK: WORD VIO handle (must be 00h) WORD column at which to start writing WORD row at which to start writing WORD number of times to write character DWORD pointer to character to replicate Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see above) Note: write wraps at end of line and terminates if it reaches end of screen ----------148102----------------------------- INT 14 - VIDEO FOSSIL - CLOSE VFOSSIL AX = 8102h Return: AX = 1954h Note: terminates all operations; after this call, the video FOSSIL may either be removed from memory or reinitialized SeeAlso: AX=8101h,AX=8103h ----------148103----------------------------- INT 14 - VIDEO FOSSIL - UNINSTALL AX = 8103h Return: AX = 1954h Note: this is an extension to the VFOSSIL spec by Bob Hartman's VFOS_IBM ----------1482------------------------------- INT 14 - KEYBOARD FOSSIL AH = 82h SeeAlso: AH=7Eh ----------1482------------------------------- INT 14 - COURIERS.COM - CONFIGURE PORT AH = 82h AL = port number (1-4) BX = speed (bps) CX = bit flags bit 0: enable input flow control bit 1: enable output flow control bit 2: use X.PC protocol (not yet implemented) SeeAlso: AH=00h,AH=8Ch ----------1483------------------------------- INT 14 - SYSTEM FOSSIL AH = 83h SeeAlso: AH=7Eh ----------1483------------------------------- INT 14 - COURIERS.COM - START INPUT AH = 83h ES:BX -> circular input buffer CX = length of buffer (should be at least 128 bytes if input flow control enabled) SeeAlso: AH=18h,AH=87h,AH=8Dh,AH=A5h"BAPI" ----------1484------------------------------- INT 14 - COURIERS.COM - READ CHARACTER AH = 84h Return: ZF set if no characters available ZF clear AL = character AH = modem status bits bit 7: set on input buffer overflow SeeAlso: AH=02h,AH=86h,AH=89h ----------1485------------------------------- INT 14 - COURIERS.COM - FLUSH PENDING INPUT AH = 85h SeeAlso: AH=0Ah,AH=88h ----------1486------------------------------- INT 14 - COURIERS.COM - START OUTPUT AH = 86h ES:BX -> output buffer CX = length of output buffer SeeAlso: AH=19h,AH=83h,AH=A4h"BAPI" ----------1487------------------------------- INT 14 - COURIERS.COM - OUTPUT STATUS AH = 87h Return: AX = number of unsent characters ----------1488------------------------------- INT 14 - COURIERS.COM - ABORT OUTPUT AH = 88h SeeAlso: AH=09h,AH=85h ----------1489------------------------------- INT 14 - COURIERS.COM - SEND SINGLE CHARACTER AH = 89h CL = character to send SeeAlso: AH=01h,AH=84h ----------148A------------------------------- INT 14 - COURIERS.COM - SEND BREAK AH = 8Ah SeeAlso: AH=89h,AH=FAh ----------148C------------------------------- INT 14 - COURIERS.COM - SET SPEED AH = 8Ch BX = speed in bps SeeAlso: AH=00h,AH=82h"COURIERS" ----------148D------------------------------- INT 14 - COURIERS.COM - DECONFIGURE PORT AH = 8Dh SeeAlso: AH=82h"COURIERS" ----------14A0------------------------------- INT 14 - 3com BAPI SERIAL I/O - CONNECT TO PORT AH = A0h ??? Return: ??? SeeAlso: AH=A1h"BAPI" ----------14A0--CXFFFF----------------------- INT 14 - Interconnections Inc. TES - INSTALLATION CHECK/STATUS REPORT AH = A0h CX = FFFFh Return: CF clear if successful AX = 5445h ('TE') CX <> FFFFh DX = port number CF set on error Note: TES is a network serial port emulation program SeeAlso: AH=A1h"TES" ----------14A1------------------------------- INT 14 - 3com BAPI SERIAL I/O - DISCONNECT FROM PORT AH = A1h ??? Return: ??? SeeAlso: AH=A0h"BAPI" ----------14A1------------------------------- INT 14 - Interconnections Inc. TES - GET LIST OF SESSIONS WITH STATUS AH = A1h Return: CX = number of active sessions ES:SI -> status array (see below) SeeAlso: AH=A2h"TES",AH=A3h"TES" Format of status array entry: Offset Size Description 00h BYTE status 01h WORD offset of name ----------14A2------------------------------- INT 14 - Interconnections Inc. TES - GET LIST OF SERVER NAMES AH = A2h Return: CX = number of servers ES:SI -> array of offsets from ES for server names SeeAlso: AH=A1h"TES" ----------14A3------------------------------- INT 14 - Interconnections Inc. TES - START A NEW SESSION AH = A3h ES:SI -> ??? Return: CF clear if successful AX = 5445h ('TE') CX <> FFFFh DX = port number CF set on error SeeAlso: AH=A1h"TES",AH=A4h"TES",AH=A6h"TES" ----------14A4------------------------------- INT 14 - 3com BAPI SERIAL I/O - WRITE BLOCK AH = A4h CX = length DH = session number (00h) ES:BX -> buffer Return: CX = number of bytes sent SeeAlso: AH=19h,AH=86h,AH=A5h"BAPI" ----------14A4------------------------------- INT 14 - Interconnections Inc. TES - HOLD CURRENTLY ACTIVE SESSION AH = A4h ??? Return: ??? SeeAlso: AH=A3h"TES",AH=A5h"TES" ----------14A5------------------------------- INT 14 - 3com BAPI SERIAL I/O - READ BLOCK AH = A5h CX = length DH = session number (00h) ES:BX -> buffer Return: CX = number of bytes read SeeAlso: AH=18h,AH=83h,AH=A4h"BAPI",AX=FF02h ----------14A5------------------------------- INT 14 - Interconnections Inc. TES - RESUME A SESSION AH = A5h AL = session number Return: ??? SeeAlso: AH=A4h"TES",AH=A6h"TES" ----------14A6------------------------------- INT 14 - 3com BAPI SERIAL I/O - SEND SHORT BREAK AH = A6h DH = session number (00h) SeeAlso: AH=1Ah,AH=8Ah,AH=FAh ----------14A6------------------------------- INT 14 - Interconnections Inc. TES - DROP A SESSION AH = A6h AL = session number Return: AH = status 00h successful else error SeeAlso: AH=A3h"TES",AH=A5h"TES" ----------14A7------------------------------- INT 14 - 3com BAPI SERIAL I/O - READ STATUS AH = A7h ??? Return: ??? ----------14A7------------------------------- INT 14 - Interconnections Inc. TES - SWITCH TO NEXT ACTIVE SESSION AH = A7h ??? Return: ??? SeeAlso: AH=A3h"TES",AH=A5h"TES" ----------14A8------------------------------- INT 14 - Interconnections Inc. TES - SEND STRING TO COMMAND INTERPRETER AH = A8h AL = 00h no visible response ES:SI -> ASCIZ command Return: ??? ----------14AF00BXAAAA----------------------- INT 14 - 3com BAPI SERIAL I/O - INSTALLATION CHECK AX = AF00h BX = AAAAh Return: AX = AF01h if installed ----------14B0------------------------------- INT 14 - 3com BAPI SERIAL I/O - ENABLE/DISABLE "ENTER COMMAND MODE" CHARACTER AH = B0h AL = 00h disable = 01h enable ----------14B1------------------------------- INT 14 - 3com BAPI SERIAL I/O - ENTER COMMAND MODE AH = B1h ----------14F4FF----------------------------- INT 14 - IBM/Yale EBIOS SERIAL I/O - INSTALLATION CHECK AX = F4FFh DX = port (00h-03h) Return: CF clear if present AX = 0000h CF set if not present AX <> 0000h ----------14F9------------------------------- INT 14 - IBM/Yale EBIOS SERIAL I/O - REGAIN CONTROL AH = F9h DX = port (00h-03h) ----------14FA------------------------------- INT 14 - IBM/Yale EBIOS SERIAL I/O - SEND BREAK AH = FAh DX = port (00h-03h) SeeAlso: AH=1Ah,AH=8Ah ----------14FB------------------------------- INT 14 - IBM/Yale EBIOS SERIAL I/O - SET OUTGOING MODEM SIGNALS AH = FBh AL = modem control register bit 0: data terminal ready 1: request to send 2: OUT1 3: OUT2 4: loopback bits 5-7 unused DX = port (00h-03h) ----------14FC------------------------------- INT 14 - IBM/Yale EBIOS SERIAL I/O - READ CHARACTER, NO WAIT AH = FCh DX = port (00h-03h) Return: AH = RS232 status bits (see AH=00h) AL = character SeeAlso: AH=02h,AH=0Ch,AX=FF02h ----------14FD02----------------------------- INT 14 - IBM/Yale EBIOS SERIAL I/O - READ STATUS AX = FD02h Return: CX = number of characters available ----------14FF02----------------------------- INT 14 - IBM/Yale EBIOS SERIAL I/O - BUFFERED READ AX = FF02h CX = length DX = port (00h-03h) ES:BX -> buffer Return: CX = number of characters read SeeAlso: AH=18h,AH=83h"COURIERS",AH=A5h"BAPI",AH=FCh ---------------------------------------------