Interrupt List Release 61 Last change 16jul00 Copyright (c) 1989-1999,2000 Ralf Brown --------!---FILELIST------------------------- Please redistribute the following files unmodified as a group, in a quartet of archives named INTER61A through INTER61D (preferably the original authenticated PKZIP archives): INTERRUP.1ST the read-me file, containing credits, availability info INTERRUP.A INT 00 through INT 10/BE \ INTERRUP.B INT 10/BF through INT 15/0F\ INTERRUP.C INT 15/10 through INT 15/E7 \ INTERRUP.D INT 15/E8 through INT 1A/B0 \ INTERRUP.E INT 1A/B1 through INT 1F \ total 2520 pages at INTERRUP.F INT 20 through INT 21/43 \ 60 lines per page, INTERRUP.G INT 21/44 through INT 21/5E \ 2684 with INTPRINT -p INTERRUP.H INT 21/5F through INT 21/E2 >(8754 entries) INTERRUP.I INT 21/E3 through INT 21/F1 / (4135 tables) INTERRUP.J INT 21/F2 through INT 25 / INTERRUP.K INT 26 through INT 2F/15 / INTERRUP.L INT 2F/16 through INT 2F/79 / INTERRUP.M INT 2F/7A through INT 2F/D9 / INTERRUP.N INT 2F/DA through INT 50 / INTERRUP.O INT 51 through INT 61 / INTERRUP.P INT 62 through INT 6A / INTERRUP.Q INT 6B through INT 91 / INTERRUP.R INT 92 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 OVERVIEW.LST brief listing of major uses of each interrupt 86BUGS.LST a listing of CPU bugs and undocumented features BIBLIO.LST bibliography of information sources for the list CMOS.LST a description of the CMOS RAM data bytes FARCALL.LST APIs available through FAR CALLs GLOSSARY.LST a glossary of terms, abbreviations, and acronyms MEMORY.LST format of the BIOS data area OPCODES.LST a listing of recent and undocumented CPU instructions PORTS.A a listing of I/O ports 0000h-013Fh PORTS.B a listing of I/O ports 0140h-0AD5h PORTS.C a listing of I/O ports 0AD6h-FFFFh CATEGORY.KEY descriptions of divider-line category letters COMBINE.COM combine the pieces of the list into a single file COMBINE.DOC documentation for COMBINE The following files should be distributed in an archive called INTER61E: 86BUGSnn.ZIP programs to test for CPU bugs COMBINE.ASM source code for COMBINE.COM INT.* invoke interrupts from commandline INTHLP??.ZIP Interrupt Helper viewer for the interrupt list INTLIST.E Epsilon extension for handling list INTPRINT.C source code for INTPRINT INTSUM??.ZIP interrupt list browser (Interrupt Summary) IVIEW*.ZIP another interrupt list browser Finally, the following should be distributed in an archive called INTER61F: INT2RTF.ZIP Slava Gostrenko's Windows Help converter INT2WHLP.ZIP convert list into Windows Help database INTERRUP.ICO icon for interrupt list HINTSRCH.ZIP WinHelp DLL for full-text searches of interrupt list IL2ME???.ZIP convert list into Multi-Edit help database INT2GUID.* convert list into TurboPower GUIDE or POPHELP database INT2HLP.ZIP convert list into QuickHelp database INT2IPF.ZIP convert list into OS/2 .IPF database INT2QH.* program to convert list into QuickHelp database INT2TPH.ZIP convert to Turbo/Borland Pascal help file (.TPH) INTHELP.* convert list into TurboPower GUIDE database RB2NG???.ZIP convert list into Norton Guides database WH_ED*.ZIP WinHelp-file editor --------!---CONTACT_INFO--------------------- 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 Internet: ralf@pobox.com (currently forwards to ralf@telerama.lm.com) FIDO: Ralf Brown 1:129/26.1 or post a message to me in the DR_DEBUG echo (I probably won't see it unless you address it to me) I reply to all e-mail submissions, 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 (many mailers are improperly configured and do not produce a valid From: address). --------!---Note----------------------------- See INTERRUP.1ST for the key to system abbreviations and a list of the trademarks mentioned here. --------!---DISCLAIMER----------------------- 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" or undocumented, 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. --------!---FLAGS---------------------------- 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. Register pairs (such as AX:BX) indicate that the item is split across the registers, with the high-order half in the first register. One or more letters may follow the interrupt number; they have the following meanings: U - undocumented function, u - partially documented function, P - available only in protected mode, R - available only in real or V86 mode, C - callout or callback (usually hooked rather than called), O - obsolete (no longer present in current versions) --------!---CATEGORIES----------------------- The ninth column of the divider line preceding an entry usually contains a classification code (the entry has not been classified if that character is a dash). The codes currently in use are: A - applications, a - access software (screen readers, etc), B - BIOS, b - vendor-specific BIOS extensions, C - CPU-generated, c - caches/spoolers, D - DOS kernel, d - disk I/O enhancements, E - DOS extenders, e - electronic mail, F - FAX, f - file manipulation, G - debuggers/debugging tools, g - games, H - hardware, h - vendor-specific hardware, I - IBM workstation/terminal emulators, i - system info/monitoring, J - Japanese, j - joke programs, K - keyboard enhancers, k - file/disk compression, l - shells/command interpreters, M - mouse/pointing device, m - memory management, N - network, n - non-traditional input devices, O - other operating systems, P - printer enhancements, p - power management, Q - DESQview/TopView and Quarterdeck programs, R - remote control/file access, r - runtime support, S - serial I/O, s - sound/speech, T - DOS-based task switchers/multitaskers, t - TSR libraries U - resident utilities, u - emulators, V - video, v - virus/antivirus, W - MS Windows, X - expansion bus BIOSes, x - non-volatile config storage y - security, * - reserved (and not otherwise classified) --------C-00--------------------------------- INT 00 C - CPU-generated - DIVIDE ERROR Desc: 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. Notes: on an 8086/8088, the return address points to the following instruction on an 80286+, the return address points to the divide instruction an 8086/8088 will generate this interrupt if the result of a division is 80h (byte) or 8000h (word) SeeAlso: INT 04,OPCODE "AAD" --------G-00--------------------------------- INT 00 - Zenith - ROM DEBUGGER Desc: invokes the ROM Debugger when at the BIOS level; equivalent to pressing Ctrl-Alt-Ins on booting. Note: since DOS revectors INT 00, it is necessary to restore this vector to its original ROM BIOS value in order to invoke the debugger once DOS loads SeeAlso: INT 03"Columbia" --------C-01--------------------------------- INT 01 C - CPU-generated - SINGLE STEP Desc: generated after each instruction if TF (trap flag) is set; TF is cleared on invoking the single-step interrupt handler Notes: 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 MS-DOS DEBUG's T command SeeAlso: INT 03"CPU" --------C-01--------------------------------- INT 01 C - CPU-generated (80386+) - DEBUGGING EXCEPTIONS Desc: generated by the CPU on various occurrences which may be of interest to a debugger program Note: events which may trigger the interrupt: Instruction address breakpoint fault - will return to execute inst Data address breakpoint trap - will return to following instruction General detect fault, debug registers in use Task-switch breakpoint trap undocumented 386/486 opcode F1h - will return to following instruc SeeAlso: INT 03"CPU" --------H-02--------------------------------- INT 02 C - external hardware - NON-MASKABLE INTERRUPT Desc: generated by the CPU when the input to the NMI pin is asserted Notes: return address points to start of interrupted instruction on 80286+ on the 80286+, further NMIs are disabled until the next IRET instruction, but one additional NMI is remembered by the hardware and will be serviced after the IRET instruction reenables NMIs maskable interrupts may interrupt the NMI handler if interrupts are enabled 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+ Low battery: HP 95LX Module pulled: HP 95LX --------m-02----SI0714----------------------- INT 02 U - STB RAPIDMAP.SYS - ??? SI = 0714h ES:DI -> ??? Return: ??? SeeAlso: INT 67/AX=6100h"STB",PORT 00E1h"STB" --------C-03--------------------------------- INT 03 C - CPU-generated - BREAKPOINT Desc: generated by the one-byte breakpoint instruction (opcode CCh) Notes: used by debuggers to implement breakpoints, such as MS-DOS 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 called by Novell DOS 7 EMM386 after displaying an exception error message (GPF, illegal opcodes, etc.) and before waiting for user input called by QEMM-386 if the user presses 'I' (undocumented) when prompted after an exception error message SeeAlso: INT 01"CPU" --------G-03--------------------------------- INT 03 - Columbia PCs (desktop,VP portables) - ROM DEBUGGER Desc: invokes the ROM Debugger if INT 03 has not been revectored; equivalent to pressing Esc on booting. SeeAlso: INT 00"Zenith",INT 03"Realia" --------G-03--------------------------------- INT 03 - Realia COBOL - DEBUGGER SUPPORT Note: Realia COBOL checks for a signature eight bytes prior to the interrupt handler when it starts up BUG: if the offset of the INT 03 vector is less than 8, the compiler and all executables generated by it will crash the system SeeAlso: INT 03"Columbia" --------G-03--------------------------------- INT 03 U - Watcom WVIDEO, Watcom WD - OUTPUT DEBUGGING MESSAGE STACK: DWORD selector DWORD offset of ASCIZ message to display Notes: the INT 03h instruction which invokes the debugger must be followed by a JMP SHORT and the signature string "WVIDEO" to check whether this interface is available, define a public byte variable named ___WD_Present, which the debugger will set to 01h before running the program SeeAlso: AX=0910h --------U-03--------------------------------- INT 03 - DTown Utilities - POP UP Program: DTown Software Development's DTown Utilities contains various tools which are useful to programmers, such as a memory viewer and disassembler Note: DTU pops up on INT 03 (if not hooked by a debugger) to allow the user to inspect memory or code when the machine crashes; various memory managers will invoke INT 03 when displaying a CPU exception error message (either automatically or when the user presses a particular key) SeeAlso: INT 2D/AL=20h"DTown" --------G-030000----------------------------- INT 03 - Soft-ICE - BACK DOOR COMMANDS - GET Soft-ICE VERSION AX = 0000h SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') Return: SI = BCD version (0280h = v2.80) SeeAlso: INT 03/AX=0910h --------G-0301------------------------------- INT 03 - Soft-ICE - BACK DOOR COMMANDS - ??? AH = 01h SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') Return: ??? SeeAlso: AX=0000h,AX=090Bh,INT 03/AH=10h --------G-030900----------------------------- INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ??? AX = 0900h SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') DS:BX -> ??? CX = ??? DX = ??? Return: ??? SeeAlso: AX=0000h,AH=01h,AX=0902h,AX=0914h --------G-030902----------------------------- INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - POPUP & START A DEBUG SESSION AX = 0902h SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') DS:BX -> initial register values (see #00001) Return: registers as specified in initial register values table Note: This function is called by LDR.EXE in loading a program to be debugged. After executing the function, Soft-ICE pops up its debugging window and you may start debugging your program. Return: ??? SeeAlso: AX=0000h,AX=090Ah,AX=0910h,AX=0914h Format of Soft-ICE initial register values: Offset Size Description (Table 00001) 00h WORD initial value of SP 02h WORD initial value of SS 04h WORD initial value of IP 06h WORD initial value of CS 08h WORD initial value of DS and ES 0Ah WORD ??? 0Ch WORD ??? 0Eh WORD ??? 10h WORD initial value of AX 12h WORD ??? (defaults to 000AH ???) 14h WORD ??? (defaults to 0001H ???) 16h WORD ??? (defaults to 0100H ???) --------G-030903----------------------------- INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ??? AX = 0903h SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') DS:BX -> ??? CX = ??? DX = ??? Return: ??? SeeAlso: AX=0000h,AX=0902h,AX=0907h,AX=0914h --------G-030907----------------------------- INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ??? AX = 0907h SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') DS:BX -> ??? CX = ??? DX = ??? Return: ??? SeeAlso: AX=0000h,AX=0903h,AX=090Ah,AX=0914h --------G-03090A----------------------------- INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ??? AX = 090Ah SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') DS:BX -> ??? CX = ??? DX = ??? Return: ??? SeeAlso: AX=0000h,AX=0907h,AX=090Bh,AX=0914h --------G-03090B----------------------------- INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ??? AX = 090Bh SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') DS:BX -> ??? CX = ??? DX = ??? Return: ??? SeeAlso: AX=0000h,AX=090Ah,AX=0910h,AX=0914h --------G-030910----------------------------- INT 03 - Soft-ICE - BACK DOOR COMMANDS - DISPLAY STRING IN Soft-ICE WINDOW AX = 0910h SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') DS:DX -> ASCIZ string to display (max 100 bytes, 0Dh OK) Program: Soft-ICE is a debugger by Nu-Mega Technologies, Inc. SeeAlso: INT 03"WVIDEO" --------G-030911----------------------------- INT 03 - Soft-ICE - BACK DOOR COMMANDS - EXECUTE Soft-ICE COMMAND AX = 0911h SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') DS:DX -> ASCIZ command string (max 100 bytes, 0Dh OK) Return: nothing SeeAlso: AX=0912h,AX=0913h --------G-030912----------------------------- INT 03 - Soft-ICE - BACK DOOR COMMANDS - GET BREAKPOINT INFORMATION AX = 0912h SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') Return: BH = entry number of last breakpoint set BL = type of last breakpoint set (see #00002) DH = entry number of last breakpoint to be triggered DL = type of last triggered breakpoint (see #00002) Program: Soft-ICE is a debugger by Nu-Mega Technologies, Inc. SeeAlso: AX=0911h,AX=0913h,AX=0914h (Table 00002) Values for Soft-ICE breakpoint type: 00h BPM (breakpoint register types) 01h I/O 02h INTerrupt 03h BPX (INT 03-style breakpoint) 04h reserved 05h range --------G-030913----------------------------- INT 03 - Soft-ICE v2.5x - BACK DOOR COMMANDS - SET Soft-ICE BREAKPOINT AX = 0913h SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') DS:DX -> breakpoint structure (see #00003) Return: AX = status 00h successful BX = breakpoint number 03h breakpoint table full 06h memory limit error 07h I/O limit error 09h range limit error 16h duplicate breakpoint SeeAlso: AX=0911h,AX=0912h,AX=0914h Format of Soft-ICE breakpoint structure: Offset Size Description (Table 00003) 00h BYTE breakpoint type (see #00004) 01h DWORD breakpoint address 1 (lower range limit for memory BPs, interrupt number for interrupt BPs, address of BP for execution BPs, I/O address (only word) for I/O BPs) 05h DWORD breakpoint address 2 (upper range limit for memory BPs, optional value to check for for interrupt BPs, overlay number (0 = root) for execution BPs) 09h DWORD breakpoint address 3 0Dh BYTE breakpoint mode 1 (see #00005) (for interrupt BPs = register to check 00h no value checking 01h check AL 02h check AH 03h check AX) 0Eh BYTE breakpoint mode 2 (see #00005) 0Fh BYTE breakpoint size (00h byte, 01h word, 03h dword) 10h BYTE breakpoint pass count before program stop 11h BYTE breakpoint state Note: all unused fields should contain zeros (Table 00004) Values for Soft-ICE breakpoint type: 00h memory location 01h memory range 03h I/O 04h interrupt 05h execution break (Table 00005) Values for Soft-ICE breakpoint mode: 01h read 02h write 04h execution --------G-030914----------------------------- INT 03 - Soft-ICE v2.5x - BACK DOOR COMMANDS - REMOVE Soft-ICE BREAKPOINT AX = 0914h SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') BX = breakpoint number (returned by AX=0913h) Return: BX = ??? Program: Soft-ICE is a debugger by Nu-Mega Technologies, Inc. SeeAlso: AX=0912h,AX=0913h --------G-030918----------------------------- INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ??? AX = 0918h SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') DS:BX -> ??? CX = ??? DX = ??? Return: ??? SeeAlso: INT 03/AX=0000h,INT 03/AX=0910h,INT 03/AX=0914h,INT 03/AH=10h --------G-0310------------------------------- INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ??? AH = 10h SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') Return: ??? SeeAlso: INT 03/AX=0000h,INT 03/AX=0910h,INT 03/AH=01h,INT 03/AH=11h --------G-0311------------------------------- INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ??? AH = 11h SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') Return: none??? SeeAlso: INT 03/AX=0000h,INT 03/AX=0910h,INT 03/AH=10h,INT 03/AX=130Ch --------G-03130C----------------------------- INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ??? AX = 130Ch SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') BX = ??? CX = ??? DX = ??? Return: AX = ??? (1300h) SeeAlso: INT 03/AX=0000h,INT 03/AX=0910h,INT 03/AH=11h,INT 03/AX=130Eh --------G-03130E----------------------------- INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ??? AX = 130Eh SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') BX = ??? CX = ??? DX = ??? Return: AX = ??? (1300h) SeeAlso: INT 03/AX=0000h,INT 03/AX=0910h,INT 03/AX=130Ch,INT 03/AX=1313h --------G-031313----------------------------- INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ??? AX = 1313h SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') BX = ??? CX = ??? DX = ??? Return: AX = ??? (1300h) SeeAlso: INT 03/AX=0000h,INT 03/AX=0910h,INT 03/AX=130Eh --------G-030900----------------------------- INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ??? AX = 0900h SI = magic value 4647h ('FG') DI = magic value 4A4Dh ('JM') Return: none??? SeeAlso: INT 03/AX=0000h,INT 03/AX=0910h,INT 03/AH=10h,INT 03/AH=12h --------C-04--------------------------------- INT 04 C - CPU-generated - INTO DETECTED OVERFLOW Desc: the INTO instruction will generate this interrupt if OF (Overflow Flag) is set; otherwise, INTO is effectively a NOP Note: may be used for convenient overflow testing (to prevent errors from propagating) instead of JO or a JNO/JMP combination SeeAlso: INT 00"CPU",OPCODE "AAD",OPCODE "AAM" --------B-05--------------------------------- INT 05 - PRINT SCREEN Desc: dump the current text screen to the first printer 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 since the BOUND instruction also calls INT 05h, but returns control to the BOUND instruction, a failed BOUND check will cause an infinite loop of PrtScreens unless the INT 05 handler is aware of the problem and checks whether the interrupt was invoked by a BOUND instruction BUG: some old BIOSes/applications appear to destroy BP on return SeeAlso: INT 10/AH=12h/BL=20h,INT 4A"Tandy 2000",INT 5E"TI Professional" SeeAlso: INT 80"Phar Lap" --------C-05--------------------------------- INT 05 C - CPU-generated (80186+) - BOUND RANGE EXCEEDED Desc: generated by BOUND instruction when the value to be tested is less than the indicated lower bound or greater than the indicated upper bound. Note: returning from this interrupt re-executes the failing BOUND instruction --------P-05454A----------------------------- INT 05 U - PSPS v2.01 - EJECT PAGE AX = 454Ah ('EJ') Program: PSPS is shareware PostScript PrintScreen utility by A.N.D. Technologies Note: sends a ^D to the current printer SeeAlso: AX=4E57h,AX=5053h,AX=554Eh --------P-054E57----------------------------- INT 05 U - PSPS v2.01 - SET PARAMETERS AX = 4E57h ('NW') ES:SI -> 11-byte buffer containing new settings Return: buffer filled SeeAlso: AX=454Ah,AX=5053h,INT 17/AH=63h --------P-055053----------------------------- INT 05 U - PSPS v2.01 - GET PARAMETERS AX = 5053h ('PS') ES:SI -> 11-byte buffer for settings Return: buffer filled SeeAlso: AX=4E57h,AX=554Eh,INT 17/AH=64h --------P-05554E----------------------------- INT 05 U - PSPS v2.01 - UNINSTALL AX = 554Eh ('UN') Program: PSPS is shareware PostScript PrintScreen utility by A.N.D. Technologies SeeAlso: AX=454Ah,AX=4E57h,INT 17/AH=62h --------C-06--------------------------------- INT 06 C - CPU-generated (80186+) - INVALID OPCODE Desc: this interrupt is generated when the CPU attempts to execute an invalid opcode (most protected-mode instructions are considered invalid in real mode) or a BOUND, LDS, LES, or LIDT instruction which specifies a register rather than a memory address Notes: 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+ generated by the 80386+ when the LOCK prefix is used with instructions other than BTS, BTR, BTC, XCHG, XADD (486), CMPXCHG (486), INC, DEC, NOT, NEG, ADD, ADC, SUB, SBB, AND, OR, or XOR, or any instruction not accessing memory. SeeAlso: INT 0C"CPU",INT 0D"CPU" --------b-06--------------------------------- INT 06 C - HP 95LX - SLEEP/WAKEUP Desc: this interrupt is called just before going into light or deep (shutdown) sleep and just after returning from light or deep sleep SeeAlso: INT 0B"HP 95LX",INT 15/AX=4DD4h,INT 15/AH=4Eh --------V-06--------------------------------- INT 06 U - no-name clone - GRAPHICS CHARACTER TABLE (NOT A VECTOR!) Desc: points at graphics data for characters 00h-7Fh of the current font SeeAlso: INT 43"EGA",INT 44"VIDEO" --------C-07--------------------------------- INT 07 C - CPU-generated (80286+) - PROCESSOR EXTENSION NOT AVAILABLE Desc: this interrupt is automatically called if a coprocessor instruction is encountered when no coprocessor is installed Note: can be used to emulate a numeric coprocessor in software SeeAlso: INT 09"CPU" --------H-08--------------------------------- INT 08 C - IRQ0 - SYSTEM TIMER Desc: 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 Notes: 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"SYSTEM",INT 50"DESQview",INT 58"DoubleDOS",INT 70"IRQ8" SeeAlso: INT 78"GO32",INT D8"Screen Thief",MEM 0040h:0040h,MEM 0040h:006Ch --------C-08--------------------------------- INT 08 C - CPU-generated (80286+) - DOUBLE EXCEPTION DETECTED Desc: called when multiple exceptions occur on one instruction, or an exception occurs in an exception handler Notes: 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 --------H-09--------------------------------- INT 09 C - IRQ1 - KEYBOARD DATA READY Desc: this interrupt is generated when data is received from the keyboard. This is normally a scan code (from either a keypress *or* a key release), but may also be an ACK or NAK of a command on AT-class keyboards. Notes: this IRQ 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 (see #00006) from the keyboard and before further processing; all further processing uses the scan code returned from INT 15/AH=4Fh the default interrupt handler is at F000h:E987h in 100%-compatible BIOSes the interrupt handler performs the following actions for certain special keystrokes: Ctrl-Break clear keyboard buffer, place word 0000h in buffer, invoke INT 1B, and set flag at 0040h:0071h SysReq invoke INT 15/AH=85h (SysReq is often labeled SysRq) Ctrl-Numlock place system in a tight wait loop until next INT 09 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 Ctrl-Alt-Plus (HP Vectra) enable keyclick Ctrl-Alt-Plus (many clones) set clock speed to high Ctrl-Alt-Minus (HP Vectra) reduce keyclick volume Ctrl-Alt-Minus (many clones) set clock speed to low Ctrl-Alt-SysReq (HP Vectra) generate hard reset Ctrl-Alt-S (many clones) run BIOS setup program Ctrl-Alt-Esc (many clones) run BIOS setup program Ctrl-Alt-Ins (many clones) run BIOS setup program Ctrl-Alt-LeftShift-GrayMinus (some clones) turn off system cache Ctrl-Alt-LeftShift-GrayPlus (some clones) turn on system cache DR DOS hooks this interrupt to control the cursor shape (underscore/ half block) for overwrite/insert mode DR Multiuser DOS hooks this interrupt for cursor shape control and to control whether Ctrl-Alt-Del reboots the current session or the entire system SeeAlso: INT 05"PRINT SCREEN",INT 0B"HP 95LX",INT 15/AH=4Fh,INT 15/AH=85h SeeAlso: INT 16/AH=00h,INT 16/AH=10h,INT 1B,INT 2F/AX=A901h,INT 4A/AH=00h"TI" SeeAlso: INT 51"DESQview",INT 59"DoubleDOS",INT 79"GO32" (Table 00006) Values for keyboard make/break (scan) code: 01h Esc 31h N 02h 1 ! 32h M 03h 2 @ 33h , < 63h F16 04h 3 # 34h . > 64h F17 05h 4 $ 35h / ? 65h F18 06h 5 % 36h Right Shift 66h F19 07h 6 ^ 37h Grey* 67h F20 08h 7 & 38h Alt 68h F21 (Fn) [*] 09h 8 * 39h SpaceBar 69h F22 0Ah 9 ( 3Ah CapsLock 6Ah F23 0Bh 0 ) 3Bh F1 6Bh F24 0Ch - _ 3Ch F2 6Ch -- 0Dh = + 3Dh F3 6Dh EraseEOF 0Eh Backspace 3Eh F4 0Fh Tab 3Fh F5 6Fh Copy/Play 10h Q 40h F6 11h W 41h F7 12h E 42h F8 72h CrSel 13h R 43h F9 73h [*] 14h T 44h F10 74h ExSel 15h Y 45h NumLock 75h -- 16h U 46h ScrollLock 76h Clear 17h I 47h Home 77h [Note2] Joyst But1 18h O 48h UpArrow 78h [Note2] Joyst But2 19h P 49h PgUp 79h [Note2] Joyst Right 1Ah [ { 4Ah Grey- 7Ah [Note2] Joyst Left 1Bh ] } 4Bh LeftArrow 7Bh [Note2] Joyst Up 1Ch Enter 4Ch Keypad 5 7Ch [Note2] Joyst Down 1Dh Ctrl 4Dh RightArrow 7Dh [Note2] right mouse 1Eh A 4Eh Grey+ 7Eh [Note2] left mouse 1Fh S 4Fh End 20h D 50h DownArrow 21h F 51h PgDn 22h G 52h Ins 23h H 53h Del 24h J 54h SysReq ---non-key codes--- 25h K 55h [Note1] F11 00h kbd buffer full 26h L 56h left \| (102-key) 27h ; : 57h F11 AAh self-test complete 28h ' " 58h F12 E0h prefix code 29h ` ~ 59h [Note1] F15 E1h prefix code 2Ah Left Shift 5Ah PA1 EEh ECHO 2Bh \ | 5Bh F13 (LWin) F0h prefix code (key break) 2Ch Z 5Ch F14 (RWin) FAh ACK 2Dh X 5Dh F15 (Menu) FCh diag failure (MF-kbd) 2Eh C FDh diag failure (AT-kbd) 2Fh V FEh RESEND 30h B FFh kbd error/buffer full Notes: scan codes 56h-E1h are only available on the extended (101/102-key) keyboard and Host Connected (122-key) keyboard; scan codes 5Bh-5Dh are only available on the 122-key keyboard and the Microsoft Natural Keyboard; scan codes 5Eh-76h are only available on the 122-key keyboard in the default configuration, break codes are the make scan codes with the high bit set; make codes 60h,61h,70h, etc. are not available because the corresponding break codes conflict with prefix codes (code 2Ah is available because the self-test result code AAh is only sent on keyboard initialization). An alternate keyboard configuration can be enabled on AT and later systems with enhanced keyboards, in which break codes are the same as make codes, but prefixed with an F0h scan code prefix code E0h indicates that the following make/break code is for a "gray" duplicate to a key which existed on the original PC keyboard; prefix code E1h indicates that the following make code has no corresponding break code (currently only the Pause key generates no break code) the Microsoft Natural Keyboard sends make codes 5Bh, 5Ch, and 5Dh (all with an E0h prefix) for the Left Windows, Right Windows, and Menu keys on the bottom row the European "Cherry G81-3000 SAx/04" keyboard contains contacts for four additional keys, which can be made available by a user modification; the three new keys located directly below the cursor pad's Delete, End, and PgDn keys send make codes 66h-68h (F19-F21); the fourth new key, named , sends make code 73h the SysReq key is often labeled SysRq the "Accord" ergonomic keyboard with optional touchpad (no other identification visible on keyboard or in owner's booklet) has an additional key above the Grey- key marked with a left-pointing triangle and labeled "Fn" in the owner's booklet which returns scan codes E0h 68h on make and E0h E8h on break the "Preh Commander AT" keyboard with additional F11-F22 keys treats F11-F20 as Shift-F1..Shift-F10 and F21/F22 as Ctrl-F1/Ctrl-F2; the Eagle PC-2 keyboard with F11-F24 keys treated those additional keys in the same way [Note1] the "Cherry G80-0777" keyboard has additional F11-F15 keys which generate make codes 55h-59h; some other extended keyboards generate codes 55h and 56h for F11 and F12, which cannot be managed by standard DOS keyboard drivers [Note2] the Schneider/Amstrad PC1512 PC keyboards contain extra keys, a mouse, and a digital joystick, which are handled like extra keys. The joystick's motion scancodes are converted into standard arrow keys by the BIOS, and the joystick and mouse button scan codes are converted to FFFFh codes in the BIOS keyboard buffer (see CMOS 15h"AMSTRAD"). In addition to the keys listed in the table above, there are Del-> (delete forward) 70h Enter 74h SeeAlso: #00602 at INT 16/AX=6F07h,#03214 at INT 4A/AH=05h --------C-09--------------------------------- INT 09 C - CPU-generated (80286,80386) - PROCESSOR EXTENSION PROTECTION ERROR Desc: 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 Notes: 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 for the 486+, a coprocessor protection error generates an INT 0D SeeAlso: INT 07"CPU" --------*-09--------------------------------- INT 09 P - internal hardware - RESERVED BY Intel (80486) Note: this exception has been moved to INT 0D SeeAlso: INT 09"CPU",INT 0D --------H-0A--------------------------------- INT 0A C - 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; DOS 3.3+ does so unless STACKS=0 has been set in CONFIG.SYS. MS/PC-DOS 3.3+ use the IBM Interrupt Sharing Protocol (see #02568) when hooking this IRQ 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,INT 7A"GO32" --------H-0A--------------------------------- INT 0A C - IRQ2 - Tandy 1000-series HARD DISK Notes: this interrupt may be masked by setting bit 2 on I/O port 21h the Tandy 1000, 1000A, and 1000HD use IRQ2 for the hard disk; the 1000EX, HX, RLX, RLX-HD, RLX-B, RLX-HD-B use IRQ5 instead; the 1000RL, RL-HD, SL, SL/2, TL, TL/2, and TL/3 are jumper-selectable for either IRQ2 or IRQ5 (default IRQ5); the 1000SX and TX are DIP-switch selectable for IRQ2 or IRQ5 (default IRQ2); the RSX and RSX-HD use IRQ14. Tandy systems which use IRQ2 for the hard disk interrupt use IRQ5 for vertical retrace. SeeAlso: INT 52"DESQview",INT 5A"DoubleDOS",INT 71 --------H-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,INT 7A"GO32" --------C-0A--------------------------------- INT 0A CP - CPU-generated (80286+) - INVALID TASK STATE SEGMENT Desc: 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 Note: 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" --------H-0B--------------------------------- INT 0B C - IRQ3 - SERIAL COMMUNICATIONS (COM2) Desc: automatically asserted by the UART when COM2 needs attention, if the UART has been programmed to generate interrupts Notes: the TOPS and PCnet adapters use this interrupt request line as an alternate on PS/2s, 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 DOS 3.3+ revectors IRQ3 to a stack-switching routine unless STACKS=0 has been set in CONFIG.SYS. MS/PC-DOS use the IBM Interrupt Sharing Protocol (see #02568) when hooking this IRQ SeeAlso: INT 0C"COM1",INT 53"DESQview",INT 5B"DoubleDOS",INT 7B"GO32" --------C-0B--------------------------------- INT 0B CP - CPU-generated (80286+) - SEGMENT NOT PRESENT Desc: 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 Note: 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"CPU" --------h-0B--------------------------------- INT 0B - HP 95LX - LOW-LEVEL KEYBOARD HANDLER Desc: this is the lowest-level keyboard handler on an HP 95LX palmtop Note: debounces key, places the keycode in I/O register 60h, and calls INT 09 SeeAlso: INT 09,INT 0D"HP 95LX",INT 15/AX=4DD4h --------H-0C--------------------------------- INT 0C C - IRQ4 - SERIAL COMMUNICATIONS (COM1) Desc: automatically asserted by the UART when COM1 needs attention, if the UART has been programmed to generate interrupts BUG: this vector is modified but not restored by Direct Access v4.0, and may be left dangling by other programs written with the same version of compiled BASIC Notes: on many PC's, COM3 shares this interrupt may be masked by setting bit 4 on I/O port 21h DOS 3.3+ revectors IRQ4 to a stack-switching routine unless STACKS=0 has been set in CONFIG.SYS. MS/PC-DOS use the IBM Interrupt Sharing Protocol (see #02568) when hooking this IRQ SeeAlso: INT 0B"COM2",INT 54"DESQview",INT 5C"DoubleDOS",INT 7C"GO32" --------C-0C--------------------------------- INT 0C C - CPU-generated (80286+) - STACK FAULT Desc: this interrupt is generated in protected mode on a stack overflow or underflow, or if an inter-level transition or task switch references a stack segment marked "not present"; it is generated in real mode on accessing a word operand at SS:FFFFh Note: 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" --------I-0C--------------------------------- INT 0C - IBM SYSTEM 36/38 WORKSTATION EMULATION - API POINTER Desc: the IBM System 36/38 emulator may be invoked through a private API, whose entry point address (see #00007) is offset 100h in the segment pointed at by this vector (Table 00007) Call the System 36/38 emulator API entry point 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) (see #00008) Return: ??? Format of System 36/38 emulator's data area: Offset Size Description (Table 00008) 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" Note: offsets are from the interrupt handler's segment --------H-0D--------------------------------- INT 0D C - 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 DOS 3.3+ revectors IRQ5 to a stack-switching routine unless STACKS=0 has been set in CONFIG.SYS. MS/PC-DOS use the IBM Interrupt Sharing Protocol (see #02568) when hooking this IRQ the Tandy 1000, 1000A, and 1000HD use IRQ2 for the hard disk; the 1000EX, HX, RLX, RLX-HD, RLX-B, RLX-HD-B use IRQ5 instead; the 1000RL, RL-HD, SL, SL/2, TL, TL/2, and TL/3 are jumper-selectable for either IRQ2 or IRQ5 (default IRQ5); the 1000SX and TX are DIP-switch selectable for IRQ2 or IRQ5 (default IRQ2); the RSX and RSX-HD use IRQ14. Tandy systems which use IRQ2 for the hard disk interrupt use IRQ5 for vertical retrace. 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" SeeAlso: INT 7D"GO32" --------H-0D--------------------------------- INT 0D C - IRQ5 - Tandy 1000 60 Hz RAM REFRESH Desc: used to ensure that the dynamic RAM retains its contents in earlier 1000-series models; later models use normal DMA for RAM refresh (some early models have no DMA unless it is added via an expansion card) SeeAlso: INT 55 --------h-0D--------------------------------- INT 0D - HP 95LX - INFRARED INTERRUPT Desc: this interrupt is used to perform communications over the infrared data link SeeAlso: INT 0B"HP 95LX",INT 0E"HP 95LX",INT 15/AX=4DD4h --------C-0D--------------------------------- INT 0D C - CPU-generated (80286+) - GENERAL PROTECTION VIOLATION Desc: the CPU generates this interrupt when it detects a protection violation which does not fit under any other category having a separate interrupt Notes: called in real mode when an instruction accesses a memory operand extending beyond offset FFFFh (i.e. WORD at FFFFh or DWORD at FFFDh or higher) 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" --------H-0E--------------------------------- INT 0E C - IRQ6 - DISKETTE CONTROLLER Desc: this interrupt is generated by the floppy disk controller on completion of an operation Notes: 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 DOS 3.3+ revectors IRQ6 to a stack-switching routine unless STACKS=0 has been set in CONFIG.SYS. MS/PC-DOS use the IBM Interrupt Sharing Protocol (see #02568) when hooking this IRQ SeeAlso: INT 0D"IRQ5",INT 56"DESQview",INT 5E"DoubleDOS",INT 7E"GO32" --------C-0E--------------------------------- INT 0E C - CPU-generated (80386+ native mode) - PAGE FAULT Desc: this interrupt is generated in protected and virtual-86 modes on attempting to access a 4K memory page whose page table entry has the "present" bit cleared Notes: used to implement virtual memory--when the page fault occurs, the operating system can load the appropriate page from disk a protected-mode program written in the Flat memory model will often generate this interrupt (typically reported as an Exception #14 or Exception 0E with a register dump) when dereferencing an uninitialized or corrupted pointer SeeAlso: INT 0B"CPU" --------h-0E--------------------------------- INT 0E C - HP 95LX - EXTERNAL CARD INTERRUPT SeeAlso: INT 0D"HP 95LX",INT 0F"HP 95LX",INT 15/AX=4DD4h --------H-0F--------------------------------- INT 0F C - IRQ7 - PARALLEL PRINTER Desc: this interrupt is generated by the LPT1 printer adapter when the printer becomes ready Notes: 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"IRQ5",INT 57"DESQview",INT 5F"DoubleDOS",INT 7F"GO32" SeeAlso: MEM 0040h:006Bh --------h-0F--------------------------------- INT 0F C - HP 95LX - REAL-TIME CLOCK SeeAlso: INT 0E"HP 95LX",INT 15/AX=4DD4h,INT 70"IRQ8" --------C-10--------------------------------- INT 10 C - CPU-generated (80286+) - COPROCESSOR ERROR Desc: this interrupt is generated by the CPU when the -ERROR pin is asserted by the coprocessor Note: AT's and clones usually wire the coprocessor to use IRQ13, but not all get it right SeeAlso: INT 09"hardware",INT 75 --------V-10--------------------------------- INT 10h - LIRVGA19 - CHAR HEIGHT HOOK Desc: LIRVGA19.COM fixes display problems on some notebooks by hooking INT 10h and resetting the BIOS character height (MEM 0040h:0085h) to 10h on return, if it happens to be greater than 10h. Program: LIRVGA19.COM is part of the Lithuanian LIR codepage support package developed by LABAS u.a.b. SeeAlso: INT 10/AX=5555h/BX=BBBBh,MEM 0040h:0085h --------V-1000------------------------------- INT 10 - VIDEO - SET VIDEO MODE AH = 00h AL = desired video mode (see #00010) Return: AL = video mode flag (Phoenix, AMI BIOS) 20h mode > 7 30h modes 0-5 and 7 3Fh mode 6 AL = CRT controller mode byte (Phoenix 386 BIOS v1.10) Desc: specify the display mode for the currently active display adapter InstallCheck: for Ahead adapters, the signature "AHEAD" at C000h:0025h for Paradise adapters, the signature "VGA=" at C000h:007Dh for Oak Tech OTI-037/057/067/077 chipsets, the signature "OAK VGA" at C000h:0008h for ATI adapters, the signature "761295520" at C000h:0031h; the byte at C000h:0043h indicates the chipset revision: 31h for 18800 32h for 18800-1 33h for 18800-2 34h for 18800-4 35h for 18800-5 62h for 68800AX (Mach32) (see also #00732) the two bytes at C000h:0040h indicate the adapter type "22" EGA Wonder "31" VGA Wonder "32" EGA Wonder800+ the byte at C000h:0042h contains feature flags bit 1: mouse port present bit 4: programmable video clock the byte at C000h:0044h contains additional feature flags if chipset byte > 30h (see #00009) for Genoa video adapters, the signature 77h XXh 99h 66h at C000h:NNNNh, where NNNNh is stored at C000h:0037h and XXh is 00h for Genoa 6200/6300 11h for Genoa 6400/6600 22h for Genoa 6100 33h for Genoa 5100/5200 55h for Genoa 5300/5400 for SuperEGA BIOS v2.41+, C000h:0057h contains the product level for Genoa SuperEGA BIOS v3.0+, C000h:0070h contains the signature "EXTMODE", indicating support for extended modes 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, Boca Super X VGA, Everex EV-673, etc. intercepted by GRAFTABL from Novell DOS 7 and Caldera OpenDOS 7.01. SeeAlso: AX=0070h,AX=007Eh,AX=10E0h,AX=10F0h,AH=40h,AX=6F05h,AH=FFh"GO32" SeeAlso: INT 33/AX=0028h,INT 5F/AH=00h,INT 62/AX=0001h,MEM 0040h:0049h Index: installation check;Tseng ET4000|installation check;Ahead video cards Index: installation check;Oak Technologies|installation check;ATI video cards Index: installation check;Paradise video|installation check;Genoa video cards Bitfields for ATI additional feature flags: Bit(s) Description (Table 00009) 0 70 Hz non-interlaced display 1 Korean (double-byte) characters 2 45 MHz memory clock rather than 40 MHz 3 zero wait states 4 paged ROMs 6 no 8514/A monitor support 7 HiColor DAC (Table 00010) Values for video mode: text/ text pixel pixel colors disply scrn system grph resol box resolution pages addr 00h = T 40x25 8x8 320x200 16gray 8 B800 CGA,PCjr,Tandy = T 40x25 8x14 320x350 16gray 8 B800 EGA = T 40x25 8x16 320x400 16 8 B800 MCGA = T 40x25 9x16 360x400 16 8 B800 VGA 01h = T 40x25 8x8 320x200 16 8 B800 CGA,PCjr,Tandy = T 40x25 8x14 320x350 16 8 B800 EGA = T 40x25 8x16 320x400 16 8 B800 MCGA = T 40x25 9x16 360x400 16 8 B800 VGA 02h = T 80x25 8x8 640x200 16gray 4 B800 CGA,PCjr,Tandy = T 80x25 8x14 640x350 16gray 8 B800 EGA = T 80x25 8x16 640x400 16 8 B800 MCGA = T 80x25 9x16 720x400 16 8 B800 VGA 03h = T 80x25 8x8 640x200 16 4 B800 CGA,PCjr,Tandy = T 80x25 8x14 640x350 16/64 8 B800 EGA = T 80x25 8x16 640x400 16 8 B800 MCGA = T 80x25 9x16 720x400 16 8 B800 VGA = T 80x43 8x8 640x350 16 4 B800 EGA,VGA [17] = T 80x50 8x8 640x400 16 4 B800 VGA [17] 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 = G 80x25 . . mono . B000 HERCULES.COM on HGC [14] 07h = T 80x25 9x14 720x350 mono var B000 MDA,Hercules,EGA = T 80x25 9x16 720x400 mono . B000 VGA 08h = T 132x25 8x8 1056x200 16 . B800 ATI EGA/VGA Wonder [2] = T 132x25 8x8 1056x200 mono . B000 ATI EGA/VGA Wonder [2] = G 20x25 8x8 160x200 16 . . PCjr, Tandy 1000 = G 80x25 8x16 640x400 color . . Tandy 2000 = G 90x43 8x8 720x348 mono . B000 Hercules + MSHERC.COM = G 90x45 8x8 720x360 mono . B000 Hercules + HERKULES [11] = G 90x29 8x12 720x348 mono . . Hercules + HERCBIOS [15] 09h = G 40x25 8x8 320x200 16 . . PCjr, Tandy 1000 = G 80x25 8x16 640x400 mono . . Tandy 2000 = G 90x43 8x8 720x348 mono . . Hercules + HERCBIOS [15] 0Ah = G 80x25 8x8 640x200 4 . . PCjr, Tandy 1000 0Bh = reserved (EGA BIOS internal use) = G 80x25 8x8 640x200 16 . . Tandy 1000 SL/TL [13] 0Ch = reserved (EGA BIOS internal use) 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 = T 132x25 Nx16 . 16 . B800 XGA, IBM Enhanced VGA [3] = T 132x25 8x16 1056x400 16/256K . . Cirrus CL-GD5420/5422/5426 = 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 = T 132x25 . . . . . Tecmar VGA/AD = T 80x43 8x8 640x348 16 4 B800 Tseng ET4000 BIOS [10] = G 80x34 8x14 640x480 . . . Lava Chrome II EGA 18h = T 80x30 9x16 720x480 16 1 A000 Realtek RTVGA [12] = T 132x25 . . mono . B000 Cirrus 5320 chipset = T 132x44 8x8 1056x352 mono . B000 Tseng Labs EVA = T 132x44 9x8 1188x352 4gray 2 B000 Tseng ET3000 chipset = T 132x44 8x8 1056x352 16/256 2 B000 Tseng ET4000 chipset = G 80x34 8x14 640x480 . . . Lava Chrome II EGA = G 1024x768 16 . . Tecmar VGA/AD 19h = T 80x43 9x11 720x473 16 1 A000 Realtek RTVGA [12] = T 132x25 8x14 1056x350 mono . B000 Tseng Labs EVA = T 132x25 9x14 1188x350 4gray 4 B000 Tseng ET3000 chipset = T 132x25 8x14 1056x350 16/256 4 B000 Tseng ET4000 chipset = T 132x34 . . mono . B000 Cirrus 5320 chipset 1Ah = T 80x60 9x8 720x480 16 1 A000 Realtek RTVGA [12] = T 132x28 8x13 1056x364 mono . B000 Tseng Labs EVA = T 132x28 9x13 1188x364 4gray 4 B000 Tseng ET3000 chipset = T 132x28 8x13 1056x364 16/256 4 B000 Tseng ET4000 chipset = T 132x44 . . mono . B000 Cirrus 5320 chipset = G . . 640x350 256 . . Tecmar VGA/AD 1Bh = T 132x25 9x14 1188x350 16 1 A000 Realtek RTVGA [12] = G . . 640x400 256 . . Tecmar VGA/AD 1Ch = T 132x25 . . . . . Cirrus 5320 chipset = T 132x30 9x16 1188x480 16 1 A000 Realtek RTVGA [12] = G . . 640x480 256 . . Tecmar VGA/AD 1Dh = T 132x43 . . . . . Cirrus 5320 chipset = T 132x43 9x11 1188x473 16 1 A000 Realtek RTVGA [12] = G . . 800x600 256 . . Tecmar VGA/AD 1Eh = T 132x44 . . . . . Cirrus 5320 chipset = T 132x60 9x8 1188x480 16 1 A000 Realtek RTVGA [12] 1Fh = G 100x75 8x8 800x600 16 1 A000 Realtek RTVGA 20h = T 132x25 . . 16 . . Avance Logic AL2101 = G 40x16 . 240x128 mono . B000 HP 95LX/100LX/200LX = G 80x30 8x16 640x480 16 . . C&T 64310/65530 BIOS = G 120x45 8x16 960x720 16 1 A000 Realtek RTVGA 21h = T 80x25 . . mono . B000 HP 200LX = T 132x30 . . 16 . . Avance Logic AL2101 = T 132x44 9x9 1188x396 16/256K . B800 WD90C = T 132x44 9x9 1188x396 16 . B800 Diamond Speedstar 24X = T 132x60 . . 16 2 B800 Tseng ET4000 chipset [10] = G 80x43 8x8 720x348 mono . B000 DESQview 2.x+Hercules [4] = G 128x48 8x16 1024x768 16 1 A000 Realtek RTVGA [12] 22h = T 132x43 . . . . . Allstar Peacock (VGA) = T 132x43 . . 16 . . Avance Logic AL2101 = T 132x44 8x8 1056x352 . . B800 Tseng Labs EVA = T 132x44 9x8 1188x352 16/256K 2 B800 Tseng ET3000 chipset = T 132x44 8x8 1056x352 16/256K 2 B800 Tseng ET4000 chipset = T 132x44 8x8 1056x352 . . . Ahead Systems EGA2001 = T 132x44 8x8 1056x352 16 2 B800 Ahead B = T 132x44 8x9 1056x398 16 . . STB Lightspeed ET4000/W32P = T 132x44 . . 16 . . Orchid Prodesigner VGA = G 80x43 8x8 720x348 mono . B800 DESQview 2.x+Hercules [4] = G 96x64 8x16 768x1024 16 1 A000 Realtek RTVGA = G 100x37 8x16 800x600 16 . . C&T 64310/65530 BIOS 23h = T 132x25 6x14 792x350 . . B800 Tseng Labs EVA = T 132x25 9x14 1188x350 16/256K 4 B800 Tseng ET3000 chipset = T 132x25 8x14 1056x350 16/256 4 B800 Tseng ET4000 chipset = T 132x25 8x14 1056x350 . . . Ahead Systems EGA2001 = T 132x25 8x14 1056x350 16 4 B800 Ahead B = T 132x25 8x8 1056x200 16 . B800 ATI EGA Wonder,ATI VIP = T 132x25 . . . . . Cirrus 5320 chipset = T 132x28 . . . . . Allstar Peacock (VGA) = T 132x28 . . 16 . . Orchid Prodesigner VGA = T 132x60 . . 16 . . Avance Logic AL2101 = G 128x48 8x16 1024x768 4 1 A000 Realtek RTVGA 24h = T 80x30 . . 16 . . Avance Logic AL2101 = T 132x25 . . . . . Allstar Peacock (VGA) = T 132x25 . . 16 . . Orchid Prodesigner VGA = T 132x28 6x13 792x364 . . B800 Tseng Labs EVA = T 132x28 9x13 1188x364 16/256K 4 B800 Tseng ET3000 chipset = T 132x28 8x12 1056x336 16 1 B800 Ahead B = T 132x28 8x13 1056x364 16/256K 4 B800 Tseng ET4000 chipset = T 132x28 8x14 1056x392 16 . . STB Lightspeed ET4000/W32P = T 132x28 . . . . . Cirrus 5320 chipset = G 64x32 8x16 512x512 256 1 A000 Realtek RTVGA = G 128x48 8x16 1024x768 16 . . C&T 64310/65530 BIOS 25h = T 80x43 . . 16 . . Avance Logic AL2101 = G 80x60 8x8 640x480 . . A000 Tseng Labs EVA = G 80x60 8x8 640x480 16/256K 1 A000 Tseng ET3000/4000 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) = G . . 640x480 16 . . NEC GB-1 = G . . 640x480 16 . . Cirrus 5320 chipset = G . . 640x400 256 . . Realtek RTVGA 26h = T 80x60 8x8 640x480 . . . Tseng Labs EVA = T 80x60 8x8 640x480 16/256K 3 B800 Tseng ET3000/4000 chipset = T 80x60 . . . . . Allstar Peacock (VGA) = T 80x60 . . 16 . . Orchid ProDesigner VGA = T 80x60 . . 16 . . Avance Logic AL2101 = G 80x60 8x8 640x480 . . . Ahead Systems EGA2001 = G 80x60 8x8 640x480 16 1 A000 Ahead B (same as 25h) = G . . 640x480 256 . . Realtek RTVGA 27h = T 132x25 8x8 1056x200 mono . B000 ATI EGA Wonder,ATI VIP = G . . 720x512 16 . . VEGA VGA = G . . 720x512 16 . . Genoa = G 100x75 8x8 800x600 256 1 A000 Realtek RTVGA [12] = G . . 960x720 16 . . Avance Logic AL2101 28h = T ???x??? . . . . . VEGA VGA = G . . 512x512 256 . . Avance Logic AL2101 = G . . 1024x768 256 . . Realtek RTVGA (1meg) = G 160x64 8x16 1280x1024 16 . . Chips&Technologies 64310 [1] 29h = G . . 640x400 256 . . Avance Logic AL2101 = 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 16/256K 1 A000 Tseng ET3000/4000 chipset = G . . 800x600 ??? . . EIZO MDB10 = G . . 800x600 16 . . Cirrus 5320 chipset = G NA . 800x600 16 . . Compaq QVision 1024/1280 = G . . 1024x1024 256 . . Realtek RTVGA BIOS v3.C10 2Ah = T 100x40 . . . . . Allstar Peacock (VGA) = T 100x40 8x16 800x640 16 . . Orchid Prodesigner VGA = T 100x40 8x15 800x600 16/256K 4 B800 Tseng ET3000/4000 chipset = T 100x40 8x15 800x600 16 . . STB Lightspeed ET4000/W32P = G . . 640x480 256 . . Avance Logic AL2101 = G . . 1280x1024 16 . . Realtek RTVGA 2Bh = G . . 800x600 16 . . Avance Logic AL2101 2Ch = G . . 800x600 256 . . Avance Logic AL2101 2Dh = G . . 640x350 256 . . VEGA VGA = G . . 640x350 256/256K . A000 Orchid, Genoa, STB = G 80x25 8x14 640x350 256/256K 1 A000 Tseng ET3000/4000 chipset = G . . 640x350 256 . . Cirrus 5320 chipset = G 80x25 8x14 640x350 256 . . STB Lightspeed ET4000/W32P = G . . 768x1024 16 . . Avance Logic AL2101 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 ET3000/4000 chipset = G . . 640x480 256/256K . . Compaq QVision 1024/1280 = G . . 768x1024 256 . . Avance Logic AL2101 2Fh = T 160x50 8x8 1280x400 16 4 B800 Ahead B (Wizard/3270) = G . . 720x512 256 . . VEGA VGA = G . . 720x512 256 . . Genoa = G 80x25 8x16 640x400 256/256K 1 A000 Tseng ET4000 chipset = G . . 1024x768 4 . . Avance Logic AL2101 30h = G 80x30 8x16 640x480 256 . . C&T 64310/65530 BIOS = G . . . . . B800 AT&T 6300 = G . . 720x350 2 . . 3270 PC = G . . 800x600 256 . . VEGA VGA = G 100x37 8x16 800x600 256/256K . A000 Orchid = G . . 800x600 256/256K . A000 STB,Genoa,Sigma = G . . 800x600 256 . . Cardinal = G 100x37 8x16 800x600 256/256K 1 A000 Tseng ET3000/4000 chipset = G . . 1024x768 16 . . Avance Logic AL2101 31h = G . . 1024x768 256 . . Avance Logic AL2101 32h = T 80x34 8x10 . 16 4 B800 Ahead B (Wizard/3270) = G . . 640x480 256 . . Compaq QVision 1024/1280 = G 100x37 8x16 800x600 256 . . C&T 64310/65530 BIOS 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) = G . . 800x600 256 . . Compaq QVision 1024/1280 = G 128x48 8x16 1024x768 256 . . Chips&Technologies 64310 36h = G . . 960x720 16 . . VEGA VGA, STB = G . . 960x720 16 . A000 Tseng ET3000 only = G . . 1280x1024 16 . . Avance Logic AL2101 37h = T 132x44 8x8 . mono . B800 ATI EGA Wonder,ATI VIP = G . . 1024x768 16 . . VEGA VGA = G 128x48 8x16 1024x768 16 . A000 Orchid = G . . 1024x768 16 . A000 STB,Genoa,Sigma = G . . 1024x768 16 . . Definicon = G 128x48 8x16 1024x768 16 1 A000 Tseng ET3000/4000 chipset = G . . 1024x768 16 . . Compaq QVision 1024/1280 = G . . 1280x1024 256 . . Avance Logic AL2101 38h = G . . 1024x768 256 . . STB VGA/EM-16 Plus (1MB) = G 128x48 8x16 1024x768 256/256K 1 A000 Tseng ET4000 chipset = G . . 1024x768 256 . . Orchid ProDesigner II = G . . 1024x768 256 . . Compaq QVision 1024/1280 = G 160x64 8x16 1280x1024 256 . . Chips&Technologies 64310 [1] 39h = G . . 1280x1024 16 . . Compaq QVision 1280 3Ah = G . . 1280x1024 256 . . Compaq QVision 1280 3Bh = G . . 512x480 256 . . Compaq QVision 1024/1280 3Ch = G . . 640x400 64K . . Compaq QVision 1024/1280 3Dh = G . . 1280x1024 16 . . Definicon = G 128x64 8x16 1280x1024 16 1 A000 Tseng ET4000 v3.00 [1,7] 3Eh = G . . 1280x961 16 . . Definicon = G . . 640x480 64K . . Compaq QVision 1024/1280 3Fh = G . . 1280x1024 256 . . Hercules ??? (ET4000W32) = G . . 800x600 64K . . Compaq QVision 1024/1280 40h = T 80x43 . . . . . VEGA VGA, Tecmar VGA/AD = T 80x43 . . . . . Video7 V-RAM VGA = T 80x43 . . . . . Tatung VGA = T 100x30 . . 16 . . MORSE VGA = T 100x30 . . . . . Cirrus 510/520 chipset = T 80x25 . 720x350 mono . . Genoa SuperEGA BIOS 3.0+ = G . . 320x200 64K . . Avance Logic AL2101 = G 80x25 8x16 640x400 2 1 B800 AT&T 6300, AT&T VDC600 = G 80x25 8x16 640x400 2 1 B800 Olivetti Quaderno = G 80x25 8x16 640x400 2 1 B800 Compaq Portable = G 80x30 8x16 640x480 32K . . Chips&Technologies 64310 = G . . 1024x768 64K . . Compaq QVision 1280 41h = T 132x25 . . . . . VEGA VGA = T 132x25 . . . . . Tatung VGA = T 132x25 . . . . . Video7 V-RAM VGA = T 100x50 . . 16 . . MORSE VGA = T 100x50 . . . . . Cirrus 510/520 chipset = T 80x34 9x14 720x476 16/256K . B800 WD90C = T 80x34 9x14 . 16 . B800 Diamond Speedstar 24X = G . . 512x512 64K . . Avance Logic AL2101 = G . . 640x200 16 1 . AT&T 6300 = G 80x30 8x16 640x480 64K . . Chips&Technologies 64310 = G 80x25 . 720x348 mono . B000 Genoa SuperEGA BIOS 3.0+ 42h = T 132x43 . . . . . VEGA VGA = T 132x43 . . . . . Tatung VGA = T 132x43 . . . . . Video7 V-RAM VGA = T 80x34 9x10 . 4 4 B800 Ahead B (Wizard/3270) = T 100x60 . . 16 . . MORSE VGA = T 100x60 . . . . . Cirrus 510/520 chipset = G 80x25 8x16 640x400 16 . . AT&T 6300, AT&T VDC600 = G . . 640x400 64K . . Avance Logic AL2101 = G 80x25 . 720x348 mono . B800 Genoa SuperEGA BIOS 3.0+ = G 100x37 8x16 800x600 32K . . Chips&Technologies 64310 43h = T 80x60 . . . . . VEGA VGA = T 80x60 . . . . . Tatung VGA = T 80x60 . . . . . Video7 V-RAM VGA = T 80x45 9x8 . 4 4 B800 Ahead B (Wizard/3270) = T 100x75 . . 16 . . MORSE VGA = T 80x29 . 720x348 mono . . Genoa SuperEGA BIOS 3.0+ = G . . 640x200 of 640x400 viewport AT&T 6300 (unsupported) = G . . 640x480 64K . . Avance Logic AL2101 = G 100x37 8x16 800x600 64K . . Chips&Technologies 64310 44h = disable VDC and DEB output . AT&T 6300 = T 100x60 . . . . . VEGA VGA = T 100x60 . . . . . Tatung VGA = T 100x60 . . . . . Video7 V-RAM VGA = T 80x32 . 720x352 mono . . Genoa SuperEGA BIOS 3.0+ = G . . 800x600 64K . . Avance Logic AL2101 45h = T 132x28 . . . . . Tatung VGA = T 132x28 . . . . . Video7 V-RAM VGA = T 80x44 . 720x352 mono . . Genoa SuperEGA BIOS 3.0+ 46h = T 132x25 8x14 . mono . . Genoa 6400 = T 132x25 9x14 . mono . . Genoa SuperEGA BIOS 3.0+ = G 100x40 8x15 800x600 2 . . AT&T VDC600 47h = T 132x29 8x12 . mono . . Genoa 6400 = T 132x29 9x12 . mono . . Genoa SuperEGA BIOS 3.0+ = T 132x28 9x16 1188x448 16/256K . B800 WD90C = T 132x28 9x16 . 16 . B800 Diamond Speedstar 24X = G 100x37 8x16 800x600 16 . . AT&T VDC600 48h = T 132x32 8x12 . mono . . Genoa 6400 = T 132x32 9x11 . mono . . Genoa SuperEGA BIOS 3.0+ = G 80x50 8x8 640x400 2 . B800 AT&T 6300, AT&T VDC600 = G 80x50 8x8 640x400 2 . B800 Olivetti Quaderno 49h = T 132x44 8x8 . mono . . Genoa 6400 = T 132x44 9x8 . mono . . Genoa SuperEGA BIOS 3.0+ = G 80x30 8x16 640x480 . . . Lava Chrome II EGA = G 80x30 8x16 640x480 . . A000 Diamond Stealth64 Video 2xx1 4Bh = G 100x37 8x16 800x600 . . A000 Diamond Stealth64 Video 2xx1 4Dh = T 120x25 . . . . . VEGA VGA = G . . 512x480 16M . . Compaq QVision 1024/1280 = G 128x48 8x16 1024x768 . . A000 Diamond Stealth64 Video 2xx1 4Eh = T 120x43 . . . . . VEGA VGA = T 80x60 8x8 . 16/256K . B800 Oak OTI-067/OTI-077 [8] = G . . 640x400 16M . . Compaq QVision 1024/1280 = G 144x54 8x16 1152x864 . . A000 Diamond Stealth64 Video 2xx1 4Fh = T 132x25 . . . . . VEGA VGA = T 132x60 . . . . . some Oak Tech VGA [8] = G . . 640x480 16M . . Compaq QVision 1280 50h = T 80x30 8x16 . 16/256K . B800 Trident TVGA 8800/8900 = T 80x34 . . . . . Lava Chrome II EGA = T 80x43 . . mono . . VEGA VGA = 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 = T 132x25 8x14 . 16/256K . B800 Oak OTI-037/067/077 [8] = T 132x25 8x14 1056x350 16 8 B800 UM587 chipset = T 132x30 . . 16 . . MORSE VGA = T 132x30 . . . . . Cirrus 510/520 chipset = G 80x30 8x16 640x480 16 . . Paradise EGA-480 = G 80x30 8x16 640x480 16 . . NEL Electronics BIOS = G 80x30 8x16 640x480 16M . . Chips&Technologies 64310 = G . . 640x480 mono??? . . Taxan 565 EGA = G 40x25 8x8 320x200 . . . Genoa SuperEGA BIOS 3.0+ 51h = T 80x30 8x16 . . . . Paradise EGA-480 = T 80x30 9x16 . . . . NEL Electronics BIOS = T 80x30 . . . . . Lava Chrome II EGA = T 80x43 8x11 . 16/256K . B800 Trident TVGA 8800/8900 = T 132x25 . . mono . . VEGA VGA = T 132x28 9x12 . 4 4 B800 Ahead B = T 132x43 8x8 . 16 5 B800 OAK Technologies VGA-16 = T 132x43 8x8 . 16/256K . B800 Oak OTI-037/067/077 = T 132x43 8x8 1056x344 16 5 B800 UM587 chipset = T 132x50 . . 16 . . MORSE VGA = T 132x50 . . . . . Cirrus 510/520 chipset = G 80x34 8x14 640x480 16 . . ATI EGA Wonder = G 80x25 8x8 640x200 . . . Genoa SuperEGA BIOS 3.0+ 52h = T 80x60 . . . . . Lava Chrome II EGA = T 80x60 8x8 . 16/256K . B800 Trident TVGA 8800/8900 = T 132x43 . . mono . . VEGA VGA = T 132x44 9x8 . mono . . Ahead Systems EGA2001 = T 132x44 9x8 . 4 2 B800 Ahead B = T 132x60 . . 16 . . MORSE VGA = T 132x60 . . . . . Cirrus 510/520 chipset = G 80x25 8x19 640x480 16 1 A000 AX VGA (Kanji&superimpose) = G 94x29 8x14 752x410 16 . . ATI EGA Wonder = G 100x75 8x8 800x600 16 1 A000 OAK Technologies VGA-16 = G 100x75 8x8 800x600 16 . A000 Oak OTI-037 chipset [8] = G 100x37 8x16 800x600 16 . A000 Oak OTI-067/077 chips [8] = G 100x75 8x8 800x600 16 . A000 UM587 chipset = G 128x30 8x16 1024x480 16 . . NEL Electronics BIOS 53h = T 80x25 8x16 . . . . NEL Electronics BIOS = T 80x60 . . 16 . . MORSE VGA = T 80x60 . . . . . Cirrus 510/520 chipset = T 132x25 8x14 . 16/256K . B800 Trident TVGA 8800/8900 = T 132x43 . . . . . Lava Chrome II EGA = G 80x25 8x19 640x480 16 1 A000 AX VGA (Kanji, no superimp.) = G . . 640x480 256 . . Oak VGA = G 80x30 8x16 640x480 256 . A000 Oak OTI-067/OTI-077 [8] = G 100x40 8x14 800x560 16 . . ATI EGA Wonder,ATI VIP = G . . . . . . AX PC 54h = T 132x25 . . . . . Lava Chrome II EGA = T 132x30 8x16 . 16/256K . B800 Trident TVGA 8800/8900 = T 132x43 8x8 . . . . Paradise EGA-480 = T 132x43 8x8 . . . . NEL Electronics BIOS = 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 = T 132x43 9x9 1188x387 16/256K . B800 WD90C = T 132x43 9x9 1188x387 16/256K . B800 Diamond Speedstar 24X = T 132x43 9x9 1188x387 16/256K . B800 Diamond Stealth 24 = T 132x43 8x8 . . . B800 Diamond Stealth64 Video 2xx1 = T 132x43 8x8 1056x350 16/256K . . Cirrus CL-GD5420/5422/5426 = T 132x50 8x8 . 16 . A000 NCR 77C22 [9] = G 100x42 8x14 800x600 16 . A000 ATI EGA Wonder, VGA Wonder = G 100x42 8x14 800x600 16 . A000 ATI Ultra 8514A, ATI XL = G . . 800x600 256 . A000 Oak VGA = G 100x37 8x16 800x600 256 . A000 Oak OTI-067/077 chips [8] 55h = T 80x66 8x8 . 16/256K . A000 ATI VIP = T 132x25 8x14 . . . . Paradise EGA-480 = T 132x25 8x14 . . . . NEL Electronics BIOS = 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 132x25 8x16 . 16 . A000 NCR 77C22 [9] = T 132x25 9x16 1188x400 16/256K . B800 WD90C = T 132x25 9x16 1188x400 16/256K . B800 Diamond Speedstar 24X = T 132x25 9x16 1188x400 16/256K . B800 Diamond Stealth 24 = T 132x25 8x16 . . . B800 Diamond Stealth64 Video 2xx1 = T 132x25 8x14 1056x350 16/256K . . Cirrus CL-GD5420/5422/5426 = 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+ [5] = G . . 1024x768 16/256K . . ATI VGA Wonder Plus = G . . 1024x768 16/256K . . ATI Ultra 8514A,ATI XL = G 128x48 8x16 1024x768 4 . A000 Oak OTI-067/077 chips [8] 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 132x43 9x8 . . . . NEL Electronics BIOS = T 132x50 8x8 . 4 . A000 NCR 77C22 [9] = T 132x60 8x8 . 16/256K . B800 Trident TVGA 8800/8900 = G . . 1024x768 16 . A000 Oak VGA = G 128x48 8x16 1024x768 16 . A000 Oak OTI-067/077 chips [8] 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 9x14 . . . . NEL Electronics BIOS = T 132x25 . . mono . . Taxan 565 EGA = T 132x25 7x16 . 2 . . AT&T VDC600 = T 132x25 9x14 . 16/256K . B800 Trident TVGA 8800/8900 = T 132x25 8x16 . 4 . A000 NCR 77C22 [9] = G 96x48 8x16 768x1024 16 . A000 Oak OTI-067/077 chips [8] 58h = T 80x33 8x14 . 16 . B800 ATI EGA Wonder,ATI VIP = T 80x32 9x16 . 16 . . Genoa 6400 = T 80x43 8x8 . . . . NEL Electronics BIOS = T 132x30 9x16 . 16/256K . B800 Trident TVGA 8800/8900 = G 100x75 8x8 800x600 16/256K . A000 Paradise VGA = G 100x75 8x8 800x600 16 . . AT&T VDC600 = G 100x75 8x8 800x600 16 . A000 NCR 77C22 [9] = G 100x75 8x8 800x600 16 . A000 Diamond Speedstar 24X = G 100x75 8x8 800x600 16/256K . A000 Paradise VGA, WD90C = G . . 800x600 16 . . AST VGA Plus, Compaq VGA = G . . 800x600 16 . . Dell VGA = G . . 800x600 16 . . Hewlett-Packard D1180A = G . . 800x600 ??? . . ELT VGA PLUS 16 = G 100x37 8x16 800x600 16/256K . A000 Cirrus CL-GD5420/5422/5426 = G 160x64 8x16 1280x1024 16 . A000 Oak OTI-077 chipset [8] 59h = T 80x43 9x8 . . . . NEL Electronics BIOS = T 80x66 8x8 . 16/256K . A000 ATI VIP = T 132x43 9x11 . 16/256K . B800 Trident TVGA 8800/8900 = G 100x75 8x8 800x600 2 . A000 Paradise VGA = G 100x75 8x8 800x600 2 . . AT&T VDC600 = G . . 800x600 2 . . AST VGA Plus, Compaq VGA = G . . 800x600 2 . . Dell VGA = G . . 800x600 2 . . Hewlett-Packard D1180A = G 100x75 8x8 800x600 2 . A000 NCR 77C22 [9] = G 128x48 8x16 1024x768 256 . A000 Oak OTI-077 chipset [8] 5Ah = T 80x60 8x8 . . . . NEL Electronics BIOS = T 132x60 9x8 . 16/256K . B800 Trident TVGA 8800/8900 = G 128x48 8x16 1024x768 2 . A000 NCR 77C22 [9] 5Bh = T 80x30 8x16 . . . B800 ATI VGA Wonder (undoc) = G . . 640x350 256 . . Genoa 6400 = G 80x25 8x16 640x400 32K . A000 Oak OTI-067/077 chips [8] = G . . 800x600 16 . . Maxxon, SEFCO TVGA, Imtec = G 100x75 8x8 800x600 16/256K . A000 Trident TVGA 8800, 8900 = G . . 800x600 ??? . . Vobis MVGA = G 100x37 8x16 800x600 . . . NEL Electronics BIOS = G 128x48 8x16 1024x768 16 . A000 NCR 77C22 [1,9] 5Ch = T 100x37 8x16 . . . . NEL Electronics BIOS = G . . 640x400 256 . . Logix, ATI Prism Elite = G . . 640x400 256 . . Maxxon, SEFCO TVGA, Imtec = G 80x25 8x16 640x400 256/256K . A000 Zymos Poach, Hi Res 512 = G 80x25 8x16 640x400 256/256K . A000 Trident TVGA 8800/8900 = G 80x30 8x16 640x480 256 . . Genoa 6400 = G 80x30 8x16 640x480 32K . A000 Oak OTI-077 chipset [8] = G 100x75 8x8 800x600 256 . A000 NCR 77C22 [9] = G 100x75 8x8 800x600 256/256K . A000 WD90C = G 100x75 8x8 800x600 256/256K . A000 Diamond Speedstar 24X = G 100x37 8x16 800x600 256/256K . A000 Cirrus CL-GD5420/5422/5426 5Dh = T 100x75 8x8 . . . . NEL Electronics BIOS = G 80x25 8x14 640x350 64K . . STB Lightspeed ET4000/W32P = G . . 640x480 256 . . Logix, ATI Prism Elite = G . . 640x480 256 . . Maxxon, SEFCO TVGA, Imtec = G 80x30 8x16 640x480 256/256K . A000 Zymos Poach, Hi Res 512 = G 80x30 8x16 640x480 256/256K . A000 Trident TVGA 8800 (512K) = G 128x48 8x16 1024x768 16 . A000 NCR 77C22 [9] = G 128x48 8x16 1024x768 16/256K . A000 WD90C = G 128x48 8x16 1024x768 16 . A000 Diamond Speedstar 24X = G 128x48 8x16 1024x768 16/256K . A000 Cirrus CL-GD5420/5422/5426 5Eh = G . . 640x400 256 . . Paradise VGA,VEGA VGA = G . . 640x400 256 . . AST VGA Plus, NCR 77C22 = G . . 640x400 256 . . Compaq VGA, Dell VGA = G 80x25 8x16 640x400 256 . . AT&T VDC600 = G 80x25 8x16 640x400 256 . A000 NCR 77C22 [9] = G 80x25 8x16 640x400 256/256K . A000 WD90C = G 80x25 8x16 640x400 256/256K . A000 Diamond Speedstar 24X = G . . 800x600 16 . . Logix, ATI Prism Elite = G 100x37 8x16 800x600 16 . . NEL Electronics BIOS = G 100x75 8x8 800x600 256 . . Genoa 6400 = G 100x75 8x8 800x600 256/256K . A000 Zymos Poach, Trident 8900 = G 100x75 8x8 800x600 256/256K . A000 Hi Res 512 5Fh = G 80x25 8x16 640x400 64K . . STB Lightspeed ET4000/W32P = G . . 640x480 256 . . Paradise VGA = G . . 640x480 256 . . AST VGA Plus, NCR 77C22 = G . . 640x480 256 . . Compaq VGA, Dell VGA = G . . 640x480 256 . . Hewlett-Packard D1180A = G 80x30 8x16 640x480 256 . . AT&T VDC600 (512K) = G 80x30 8x16 640x480 256 . A000 NCR 77C22 [9] = G 80x30 8x16 640x480 256/256K . A000 WD90C = G 80x30 8x16 640x480 256/256K . A000 Diamond Speedstar 24X = G 80x30 8x16 640x480 256/256K . A000 Cirrus CL-GD5420/5422/5426 = G . . 1024x768 16 . . Logix, ATI Prism Elite = G . . 1024x768 16 . . Maxxon, Imtec = G 128x48 8x16 1024x768 16 . . Genoa 6400 = G 128x48 8x16 1024x768 16/256K . A000 Zymos Poach, Hi Res 512 = G 128x48 8x16 1024x768 16/256K . A000 Trident TVGA 88/8900 512K 60h = T 132x25 8x14 . 16/64 8 B800 Quadram Ultra VGA = T 132x25 8x14 . 16 . . Genoa 6400 = T 132x25 8x14 . 16 . . Genoa SuperEGA BIOS 3.0+ = T 132x25 . . . . . Cirrus 5320 chipset = T 132x25 8x16 1056x400 16 . B800 Chips&Technologies chipset = G 80x??? . ???x400 . . . Corona/Cordata BIOS 4.10+ = G 80x25 8x16 640x400 256 1 A000 Ahead A, Ahead B = G . . 752x410 . . . VEGA VGA = G . . 752x410 16 . . Tatung VGA = G . . 752x410 16 . . Video7 V-RAM VGA = G 128x48 8x16 1024x768 4/256K . A000 Trident TVGA 8900 = G 128x48 8x16 1024x768 256/256K . A000 WD90C = G 128x48 8x16 1024x768 256/256K . A000 Diamond Speedstar 24X = G 128x48 8x16 1024x768 256/256K . A000 Cirrus CL-GD5420/5422/5426 = G 144x54 8x16 1152x864 . . A000 Diamond Stealth64 Video 2xx1 61h = T 132x29 8x12 . 16/64 8 B800 Quadram Ultra VGA = T 132x29 8x8 . 16 . . Genoa 6400 = T 132x29 8x8 . 16 . . Genoa SuperEGA BIOS 3.0+ = T 132x50 . . . . . Cirrus 5320 chipset = T 132x50 8x8 1056x400 16 . B800 Chips&Technologies chipset = T 132x50 8x16 1056x800 16 . B800 Chips&Technologies 64310 = G . . ???x400 . . . Corona/Cordata BIOS 4.10+ = G 80x25 8x16 640x400 256 . A000 ATI VGA Wonder,VGA Wonder+ = G 80x25 8x16 640x400 256 . A000 ATI Ultra 8514A,ATI XL = G 80x25 8x16 640x400 . . A000 Diamond Stealth64 Video 2xx1 = G 80x30 8x16 640x480 256 1 A000 Ahead A, Ahead B (512K) = G . . 720x540 . . . VEGA VGA = G . . 720x540 16 . . Tatung VGA = G . . 720x540 16 . . Video7 V-RAM VGA = G 96x64 8x16 768x1024 16/256K . A000 Trident TVGA 88/8900 512K = G 128x48 8x16 1024x768 256 . A000 NCR 77C22 [1,9] = G 144x54 8x16 1152x864 . . A000 Diamond Stealth64 Video 2xx1 62h = T 132x32 8x11 . 16/64 6 B800 Quadram Ultra VGA = T 132x32 8x12 . 16 . . Genoa 6400 = T 132x32 8x11 . 16 . . Genoa SuperEGA BIOS 3.0+ = T 132x43 8x8 1056x344 16 . B800 C&T 82C450 BIOS = G . . 640x450 16 . . Cirrus 510/520 chipset = G 80x30 8x16 640x480 256 . A000 ATI VGA Wonder,VGA Wonder+ = G 80x30 8x16 640x480 256 . A000 ATI Ultra 8514A,ATI XL = G 80x30 8x16 640x480 32K . A000 WD90C = G 80x30 8x16 640x480 32K . A000 Diamond Speedstar 24X = G . . 800x600 . . . VEGA VGA = G . . 800x600 16 . . Tatung VGA = G . . 800x600 16 . . Video7 V-RAM VGA = G 100x75 8x8 800x600 256 1 A000 Ahead A, Ahead B (512K) = G 128x48 8x16 1024x768 256/256K . A000 Trident TVGA 8900, Zymos = G 128x48 8x16 1024x768 256 . A000 NCR 77C22 [9] 63h = T 132x44 8x8 . 16/64 5 B800 Quadram Ultra VGA = T 132x44 8x8 . 16 . . Genoa 6400 = T 132x44 8x8 . 16 . . Genoa SuperEGA BIOS 3.0+ = G . . 720x540 16 . . MORSE VGA = G . . 720x540 16 . . Cirrus 510/520 chipset = G 100x42 8x14 800x600 256 . A000 ATI VGA Wonder,VGA Wonder+ = G 100x42 8x14 800x600 256 . A000 ATI Ultra 8514A,ATI XL = G . . 800x600 32K . A000 WD90C = G . . 800x600 32K . A000 Diamond Speedstar 24X = G 128x48 7x16 1024x768 256 1 A000 Ahead B (1MB) = G . . 1024x768 2 . . Video7 V-RAM VGA 64h = T 132x60 8x8 . 16 . . Genoa 6400 = T 80x43 8x8 528x344 16 . B800 C&T 82C450 BIOS = G . . 640x480 64K . A000 Cirrus CL-GD 5422/5426 = G . . 800x600 16 . . MORSE VGA = G . . 800x600 16 . . Cirrus 510/520 chipset = G . . 800x600 ??? . . SAMPO-Mira VGA = G . . 1024x768 4 . . Video7 V-RAM VGA = G 128x48 8x16 1024x768 256 . A000 ATI VGA Wonder Plus,ATI XL = G 160x64 8x16 1280x1024 16/256K . A000 WD90C [1] = G 160x64 8x16 1280x1024 16/256K . A000 Diamond Speedstar 24X [1] 65h = T 80x50 8x8 528x400 16 . B800 C&T 82C450 BIOS = G . . 800x600 64K . A000 Cirrus CL-GD 5422/5426 = G . . 1024x768 16 . . Video7 V-RAM VGA = G 128x48 8x16 1024x768 16 . A000 ATI VGA Wonder 66h = T 80x50 8x8 640x400 16/256K . B800 WD90C = T 80x50 8x8 . 16 . B800 Diamond Speedstar 24X = G . . 640x400 256 . . Tatung VGA = G . . 640x400 256 . . Video7 V-RAM VGA = G . . 640x480 32K . A000 Cirrus CL-GD 5422/5426 67h = T 80x43 8x8 640x344 16/256K . B800 WD90C = T 80x43 8x8 . 16 . B800 Diamond Speedstar 24X = G . . 640x480 256 . . Video7 V-RAM VGA = G . . 800x600 32K . A000 Cirrus CL-GD 5422/5426 = G 128x48 8x16 1024x768 4 . A000 ATI VGA Wonder = G 160x64 8x16 1280x1024 16 . A000 NCR 77C22 [1,9] 68h = G 80x25 8x16 640x400 . . A000 Diamond Stealth64 Video 2xx1 69h = T 132x50 8x8 1056x400 16/256K . B800 WD90C = T 132x50 8x8 . 16 . B800 Diamond Speedstar 24X = G 80x30 8x16 640x480 . . A000 Diamond Stealth64 Video 2xx1 = G . . 720x540 256 . A000 Video7 V-RAM VGA 6Ah = G . . 800x600 16 . A000 VESA standard interface = G 100x75 8x8 800x600 16 . A000 Genoa 6400 = G 100x75 8x8 800x600 16 . A000 Diamond Speedstar 24X = G . . 800x600 16 . A000 Ahead A = G 100x75 8x8 800x600 16 1 A000 Ahead B (VESA) [see 71h] = G . . 800x600 16 . . Zymos Poach, Hi Res 512 = G . . 800x600 16 . . Epson LT-386SX in CRT Mode = G . . 800x600 16 . . Compuadd 316SL in CRT Mode = G 100x37 8x16 800x600 16/256K . A000 Cirrus CL-GD5420/5422/5426 = G 100x37 8x16 800x600 16 . A000 Diamond Stealth64 Video 2xx1 = G 100x42 8x14 800x600 . . A000 ATI VGA Wonder (undoc) = G . . 800x600 16 . A000 Chips&Technologies chipset = G 160x64 8x16 1280x1024 256 . A000 NCR 77C22 [1,9] 6Bh = T 100x37 8x16 . 16 . . Genoa 6400 = T 100x37 8x16 . . . . NEL Electronics BIOS = G 100x37 8x16 800x600 . . A000 Diamond Stealth64 Video 2xx1 6Ch = G 80x30 8x16 640x480 16M . A000 Trident 8900CL/BIOS C04 = G 100x75 8x8 800x600 256 . . Genoa 6400 = G 128x48 8x16 1024x768 2 . A000 Diamond Stealth64 Video 2xx1 = G 160x60 8x16 1280x960 16/256K . A000 WD90C [1] = G 160x60 8x16 1280x960 16/256K . A000 Diamond Speedstar 24X [1] = G 160x64 8x16 1280x1024 16/256K . A000 Cirrus CL-GD 5422/5426 [1] 6Dh = G 80x25 8x14 640x350 64K . A000 STB Lightspeed ET4000/W32P = G 128x48 8x16 1024x768 . . A000 Diamond Stealth64 Video 2xx1 = G 160x64 8x16 1280x1024 256/256K . A000 Cirrus CL-GD 5422/5426 [1] 6Eh = G 40x25 8x8 320x200 64K . A000 Cirrus CL-GD 5422/5426 = G 160x64 8x16 1280x1024 2 . A000 Diamond Stealth64 Video 2xx1 6Fh = G 40x25 8x8 320x200 16M . A000 Cirrus CL-GD 5422/5426 = G 160x64 8x16 1280x1024 . . A000 Diamond Stealth64 Video 2xx1 70h = extended mode set (see AX=0070h) . Everex Micro Enhancer EGA = T 40x25 8x8 . 16 8 B800 Quadram (CGA double scan) = T 40x25 8x8 (CGA dblscan) . . Genoa SuperEGA BIOS 3.0+ = G . . 360x480 256 . . Cirrus 510/520/5320 chips = G 90x28 8x14 720x392 16 1 A000 Ahead B = G 80x30 8x16 640x480 . . A000 Diamond Stealth64 Video 2xx1 = G 100x38 8x16 800x600 16 . A000 C&T chipset, Cardinal = G . . 1024x480 256 . A000 Trident 8900C BIOS C3.0 71h = T 80x25 8x8 . 16 8 B800 Quadram (CGA double scan) = T 80x25 8x8 (CGA dblscan) . . Genoa SuperEGA BIOS 3.0+ = G . . 528x400 256 . . Cirrus 510/520 chipset = G 80x30 8x16 640x480 16M . A000 Cirrus CL-GD 5422/5426 = G 80x30 8x16 640x480 . . A000 Diamond Stealth64 Video 2xx1 = G 100x35 8x16 800x600 16/64 . A000 NSI Smart EGA+ = G 100x75 8x8 800x600 16 1 A000 Ahead B (same as 6Ah) = G . . 960x720 16 . . C&T chipset, Cardinal = G . . 1024x480 256 . A000 Trident 8900C BIOS C3.0 72h = T 80x60 8x8 . 16 . B800 Quadram Ultra VGA = T 80x60 8x8 . 16 . B800 Genoa 6400 = T 80x60 8x8 . 16 . B800 Genoa SuperEGA BIOS 3.0+ = G . . 528x480 256 . . Cirrus 510/520 chipset = G 80x25 8x19 640x480 16 1 A000 DOS/V w/ any VGA = G 80x30 8x16 640x480 . . A000 Diamond Stealth64 Video 2xx1 = G . . 640x480 32K . A000 ATI = G . . 640x480 16M . A000 WD90C = G . . 640x480 16M . A000 Diamond Speedstar 24X = G . . 1024x768 16 . . C&T chipset, Cardinal = G 128x48 8x16 1024x768i 16 . A000 C&T 82C450 BIOS = G 128x48 8x16 1024x768 16 . A000 C&T 65530 BIOS (multisync) 73h = G 80x60 8x8 640x480 16 . A000 Quadram Ultra VGA = G 80x60 8x8 640x480 16 . . Genoa 6400 = G 80x60 8x8 640x480 16 . . Genoa SuperEGA BIOS 3.0+ = G 100x37 8x16 800x600 . . A000 Diamond Stealth64 Video 2xx1 = T 80x25 8x19 640x475 16 1 none DOS/V, emulated in VGA graph 74h = T 80x66 8x8 . 16 . B800 Quadram Ultra VGA = T 80x66 8x8 . 16 . B800 Genoa 6400 = T 80x66 8x8 . 16 . B800 Genoa SuperEGA BIOS 3.0+ = G . . 640x400 2 . B800 Toshiba 3100 AT&T mode = G 80x30 8x16 640x480 32K . A000 Trident 8900C/BIOS C03 = G 100x37 8x16 800x600 . . A000 Diamond Stealth64 Video 2xx1 = G 128x48 8x16 1024x768 16 1 A000 Ahead A, Ahead B (512K) = G . . 1024x768 64K . A000 Cirrus CL-GD 5422/5426 [1] 75h = G 80x30 8x16 640x480 64K . A000 Trident 8900C/BIOS C03 = G 80x66 . 640x528 16??? . A000 Quadram Ultra VGA = G 80x66 . 640x528 16 . . Genoa SuperEGA BIOS 3.0+ = G 100x37 8x16 800x600 . . A000 Diamond Stealth64 Video 2xx1 = G 128x48 8x16 1024x768 4 1 A000 Ahead B = G 128x48 8x16 1024x768 16 . A000 Chips&Technologies 64310 76h = T 94x29 8x14 . 16 . B800 Quadram Ultra VGA = T 94x29 8x14 . . . . Genoa SuperEGA BIOS 3.0+ = G 100x75 8x8 800x600 32K . A000 Trident 8900C/BIOS C03 = G 128x48 8x16 1024x768 2 1 A000 Ahead B = G 128x48 8x16 1024x768 . . A000 Diamond Stealth64 Video 2xx1 = G 160x64 8x16 1280x1024 16 . A000 Chips&Technologies 64310 [1] 77h = G 94x29 . 752x410 16??? . A000 Quadram Ultra VGA = G 94x29 . 752x410 16 . . Genoa SuperEGA BIOS 3.0+ = G 100x75 8x8 800x600 64K . A000 Trident 8900C/BIOS C03 = G 128x48 8x16 1024x768 . . A000 Diamond Stealth64 Video 2xx1 78h = T 100x37 8x16 . 16 . . Genoa 6400 = T 100x75 8x8 . 16 . B800 Quadram Ultra VGA = T 100x75 8x8 . . . . Genoa SuperEGA BIOS 3.0+ = G . . 640x400 256 . . STB VGA/EM-16 Plus = G 80x25 8x16 640x400 256 . . Cardinal, C&T chipset = G . . 640x400 256 . . Cirrus 5320 chipset = G 80x25 8x16 640x400 256 . A000 Chips&Technologies 64310 79h = G 80x30 8x16 640x480 256 . . Cardinal, C&T chipset = G 80x30 8x16 640x480 256 . A000 Chips&Technologies 64310 = G 100x75 . 800x600 16??? . A000 Quadram Ultra VGA = G 100x75 8x8 800x600 16 . . Genoa SuperEGA BIOS 3.0+ = G 100x75 8x8 800x600 16 . . Genoa 6400 7Ah = T 114x60 8x8 . 16 . B800 Quadram Ultra VGA = T 114x60 8x8 . . . . Genoa SuperEGA BIOS 3.0+ = G . . 720x540 256 . . C&T chipset, Cardinal 7Bh = G . . 800x600 256 . . C&T chipset, Cardinal = G 114x60 . 912x480 16??? . A000 Quadram Ultra VGA = G . . 912x480 16 . . Genoa SuperEGA BIOS 3.0+ 7Ch = G . . 512x512 16 . . Genoa = G 100x37 8x16 800x600 256 . . C&T 82C453/F65530 chipsets = G 100x37 8x16 800x600 256 . A000 Chips&Technologies 64310 = G 200x75 8x16 1600x1200 . [16] . A000 Diamond Stealth64 Video 2xx1 7Dh = G 64x32 8x16 512x512 256 . . Genoa 7Eh = special mode set (see AX=007Eh) . Paradise VGA, AT&T VDC600 = G 80x25 8x16 640x400 256 . . Genoa 6400 = G . . 1024x768 256 . . C&T 82C453 chipset = G 128x48 8x16 1024x768 256 . A000 Chips&Technologies 64310 = G 90x43 . . mono . B000 HERCULES.COM on HGC [14] 7Fh = special function set (see AX=007Fh/BH=00h) Paradise VGA, AT&T VDC600 = G 128x48 8x16 1024x768 4 . . Genoa 6400 = G 90x29 . . mono . B000 HERCULES.COM on HGC [14] 82h = T 80x25 . . B&W . . AT&T VDC overlay mode [6] 83h = T 80x25 . . . . . AT&T VDC overlay mode [6] 86h = G . . 640x200 B&W . . AT&T VDC overlay mode [6] 88h = G 90x43 8x8 720x348 mono . B000 Hercules + MSHERC.COM C0h = G . . 640x400 2/prog palette . AT&T VDC overlay mode [6] = G . . 640x400 2/prog palette . Olivetti Quaderno overlay C4h = disable output . . . . AT&T VDC overlay mode [6] C8h = G 80x50 8x8 640x400 2 . B800 Olivetti Quaderno overlay D0h = G . . 640x400 2 . B800 DEC VAXmate AT&T mode Notes: [1] interlaced only [2] 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 [3] early XGA boards support 132-column text but do not have this BIOS mode [4] 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 [5] ATI BIOS v4-1.00 has a text-scrolling bug in this mode [6] for AT&T VDC overlay modes, BL contains the DEB mode, which may be 06h, 40h, or 44h [7] BIOS text support is broken in this undocumented mode; scrolling moves only about 1/3 of the screen (and does even that portion incorrectly), while screen clears only clear about 3/4. [8] The Oak OTI-037/067/077 modes are present in the Oak VGA BIOS, which OEMs may choose to use only partially or not at all; thus, not all Oak boards support all "Oak" modes listed here [9] this card uses the full 128K A000h-BFFFh range for the video buffer, precluding the use of a monochrome adapter in the same system [10] mode 17h supported by Tseng ET4000 BIOS 8.01X dated 1990/09/14, but not v8.01X dated 1992/02/28; mode 21h supported by 1992/02/28 version but not 1990/09/14 version [11] HERKULES simulates a 90x45 text mode in Hercules graphics mode; the installation check for HERKULES.COM is the signature "Herkules" two bytes beyond the INT 10 handler [12] The Realtek RTVGA BIOS v3.C10 crashes when attempting to switch into modes 21h or 27h; this version of the BIOS also sets the BIOS data area incorrectly for extended text modes, resulting in scrolling after only 24 lines (the VMODE.EXE utility does set the data area correctly) [13] The Tandy 1000SL/TL BIOS does not actually support this mode [14] HERCULES.COM is a graphics-mode BIOS extension for Hercules-compatible graphics cards by Soft Warehouse, Inc. Its installation check is to test whether the word preceding the INT 10 handler is 4137h. [15] The Hercules-graphics video modes for HERCBIOS (shareware by Dave Tutelman) may be changed by a command-line switch; the 90x43 character-cell mode's number is always one higher than the 90x29 mode (whose default is mode 08h) [16] Stealth64 Video 2001-series BIOS v1.03 reports 76 lines for mode 7Ch, resulting in incorrect scrolling for TTY output (scrolling occurs only after the end of the 76th line, which is not displayed) [17] For 43-line text on EGA or 43/50-line text on VGA, you must load an 8x8 font using AX=1102h after switching to mode 3; VGA may also require using INT 10/AH=12h/BL=30h SeeAlso: #00011,#00083,#00191 Index: video modes Index: installation check;HERKULES|installation check;HERCULES.COM --------V-100070----------------------------- INT 10 - VIDEO - Everex Micro Enhancer EGA/Viewpoint VGA - EXTENDED MODE SET AX = 0070h BL = mode (see #00011) Desc: specify a proprietary display mode on the Everex Micro Enhancer or Viewpoint video adapters SeeAlso: AH=00h,AX=6F05h,AX=7000h/BX=0004h,AH=FFh"GO32" (Table 00011) Values for Everex video mode: text/ text pixel pixel colors disply scrn monitor adapter grph resol box resolution pages addr 00h = G . . 640x480 16 . . multisync EGA,VGA 01h = G . . 752x410 16 . . multisync EGA,VGA 02h = G . . 800x600 16 . . multisync EGA,VGA 03h = T 80x34 . . . . . multisync EGA,VGA 04h = T 80x60 . . . . . multisync EGA,VGA 05h = T 94x29 . . . . . multisync EGA only 06h = T 94x51 . . . . . multisync 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,EV673 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 . . . . . . . Everex EV-673 21h = T 160x64 8x16 1280x1024 16 . . . 1MB VGA only 30h = G . . 640x480 256 . . . Everex 629,678 . . . . . . . Everex EV-673 31h = G . . 800x600 256 . . . Everex 629,678 . . . . . . . Everex EV-673 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 SeeAlso: #00010,#00191 Index: video modes;Everex --------V-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) Desc: specify a display mode by resolution rather than mode number SeeAlso: AH=00h,AX=0070h,AX=007Fh/BH=00h,AX=6F05h,AH=FFh"GO32" Index: video modes;Paradise|video modes;AT&T --------V-10007FBH00------------------------- INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - SET VGA OPERATION AX = 007Fh BH = 00h Return: AL = 7Fh if successful (AT&T VDC600) BH = status (Paradise/Dell) 00h invalid function 7Fh successful SeeAlso: AX=007Fh/BH=01h,AX=007Fh/BH=02h --------V-10007FBH01------------------------- INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - SET NON-VGA OPERATION AX = 007Fh BH = 01h Return: AL = 7Fh if successful (AT&T VDC600) BH = status (Paradise/Dell) 00h invalid function 7Fh successful Note: 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 SeeAlso: AX=007Fh/BH=00h,AX=007Fh/BH=02h --------V-10007FBH02------------------------- INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - QUERY MODE STATUS AX = 007Fh BH = 02h Return: AL = 7Fh if successful (AT&T VDC600) BH = status (Paradise/Dell) 00h invalid function 7Fh successful ---if successful--- 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 Note: under Novell DOS 7 TaskMgr Multitasker, this call always returns 0K video memory in CX SeeAlso: AX=007Fh/BH=00h,AX=007Fh/BH=01h --------V-10007FBH03------------------------- INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - LOCK CURRENT MODE AX = 007Fh BH = 03h Return: AL = 7Fh if successful (AT&T VDC600) BH = status (Paradise/Dell) 00h invalid function 7Fh successful Desc: allows current mode (VGA or non-VGA) to survive re-boot SeeAlso: AX=007Eh,AX=007Fh/BH=04h,AX=007Fh/BH=06h,AH=FFh"Oak" --------V-10007FBH04------------------------- INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - ENTER MDA EMULATION MODE AX = 007Fh BH = 04h Return: AL = 7Fh if successful (AT&T VDC600) BH = status (Paradise/Dell) 00h invalid function 7Fh successful SeeAlso: AX=007Eh,AX=007Fh/BH=03h,AX=007Fh/BH=05h,AH=FFh"Oak" --------V-10007FBH05------------------------- INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - ENTER CGA EMULATION MODE AX = 007Fh BH = 05h Return: AL = 7Fh if successful (AT&T VDC600) BH = status (Paradise/Dell) 00h invalid function 7Fh successful SeeAlso: AX=007Eh,AX=007Fh/BH=03h,AX=007Fh/BH=04h,AH=FFh"Oak" --------V-10007FBH06------------------------- INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - ENTER MONOCHROME VGA MODE AX = 007Fh BH = 06h Return: AL = 7Fh if successful (AT&T VDC600) BH = status (Paradise/Dell) 00h invalid function 7Fh successful Note: this function also switches to video mode 7 SeeAlso: AX=007Eh,AX=007Fh/BH=03h,AX=007Fh/BH=07h,AH=FFh"Oak" --------V-10007FBH07------------------------- INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - ENTER COLOR VGA MODE AX = 007Fh BH = 07h Return: AL = 7Fh if successful (AT&T VDC600) BH = status (Paradise/Dell) 00h invalid function 7Fh successful Note: this function also switches to video mode 3 SeeAlso: AX=007Eh,AX=007Fh/BH=03h,AX=007Fh/BH=06h,AH=FFh"Oak" --------V-10007F----------------------------- INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - EXTENDED DATA REGISTER ACCESS AX = 007Fh BH = function 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 29h-2Fh ??? (Paradise VGA for Dell, 1991/07/24) Return: AL = 7Fh if successful (AT&T VDC600) BH = status (Paradise/Dell) 00h invalid function 7Fh successful SeeAlso: AX=007Eh,AX=007Fh/BH=03h,AX=007Fh/BH=05h,AH=FFh"Oak" --------V-10007FBH60------------------------- INT 10 - Paradise VGA - ??? AX = 007Fh BH = 60h BL = ??? (00h-13h) ??? Return: BH = status (00h failed or not supported, 7Fh successful) ??? Note: this function is supported by the 1993/5/14 ROM for the Dell 486D SeeAlso: AX=007Fh/BH=61h --------V-10007FBH61------------------------- INT 10 - Paradise VGA - ??? AX = 007Fh BH = 61h ES:DI -> buffer for list of ??? (see #00012) Return: BH = status (00h failed or not supported, 7Fh successful) ??? Note: this function is supported by the 1993/5/14 ROM for the Dell 486D SeeAlso: AX=007Fh/BH=60h Format of Paradise VGA list entry: Offset Size Description (Table 00012) 00h BYTE ??? or 00h if end of list 01h BYTE ??? 02h WORD ??? 04h WORD ??? 06h WORD ??? --------V-10007FBXA500----------------------- INT 10 - Paradise VGA - ??? AX = 007Fh BX = A500h ??? Return: BH = status (00h failed or not supported, 7Fh successful) ??? Note: this function is supported by the 1993/5/14 ROM for the Dell 486D SeeAlso: AX=007Fh/BH=A6h --------V-10007FBHA5------------------------- INT 10 - Paradise VGA - ??? AX = 007Fh BH = A5h BL = ??? bits 3-0: ??? (0-4) bits 5,4: ??? ??? Return: BH = status (00h failed or not supported, 7Fh successful) ??? Note: this function is supported by the 1993/5/14 ROM for the Dell 486D --------V-10007FBHA6------------------------- INT 10 - Paradise VGA - ??? AX = 007Fh BH = A6h ??? Return: BH = status (00h failed or not supported, 7Fh successful) ??? Note: this function is supported by the 1993/5/14 ROM for the Dell 486D SeeAlso: AX=007Fh/BH=A5h --------V-1001------------------------------- INT 10 - VIDEO - SET TEXT-MODE CURSOR SHAPE AH = 01h CH = cursor start and options (see #00013) CL = bottom scan line containing cursor (bits 0-4) Return: nothing Desc: specify the starting and ending scan lines to be occupied by the hardware cursor in text modes 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 above should call INT 10/AX=1130h or read 0040h:0085h first to determine the current font height on some adapters, setting the end line greater than the number of lines in the font will result in the cursor extending to the top of the next character cell on the right 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,AH=12h/BL=34h,#03885 Bitfields for cursor start and options: Bit(s) Description (Table 00013) 7 should be zero 6,5 cursor blink (00=normal, 01=invisible, 10=erratic, 11=slow) (00=normal, other=invisible on EGA/VGA) 4-0 topmost scan line containing cursor --------V-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) Return: nothing SeeAlso: AH=03h,AH=05h,INT 60/DI=030Bh,MEM 0040h:0050h --------V-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 With PhysTechSoft's PTS ROM-DOS the BH value is ignored on entry. SeeAlso: AH=01h,AH=02h,AH=12h/BL=34h,MEM 0040h:0050h,MEM 0040h:0060h --------V-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 Desc: determine the current position and status of the light pen (if present) 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 --------V-1004------------------------------------ INT 10 - HUNTER 16 - GET CURSOR ADDRESS AH = 04h BH = page Return: DH = row (0..24) DL = column (0..79) CH = cursor pixel Y-address (0..199) CL = cursor pixel X-address (0..639) Notes: the Husky Hunter 16 is an 8088-based ruggedized laptop. Other family members are the Husky Hunter, Husky Hunter 16/80, and Husky Hawk. pixel coordinates are for the lower left corner of the character cell containing the cursor SeeAlso: AH=60h"HUNTER" --------V-1005------------------------------- INT 10 - VIDEO - SELECT ACTIVE DISPLAY PAGE AH = 05h AL = new page number (00h to number of pages - 1) (see #00010) Return: nothing Desc: specify which of possibly multiple display pages will be visible Note: to determine whether the requested page actually exists, use AH=0Fh to query the current page after making this call SeeAlso: AH=0Fh,AH=43h,AH=45h,MEM 0040h:0062h,MEM 0040h:004Eh --------V-100500----------------------------- INT 10 - VIDEO - Corona/Cordata BIOS v4.10+ - SET GRAPHICS BITMAP BUFFER AX = 0500h BX = segment of buffer Return: nothing Desc: set the address of graphics bitmap buffer for video modes 60h and 61h SeeAlso: AX=050Fh"Corona" --------V-10050F----------------------------- INT 10 - VIDEO - Corona/Cordata BIOS v4.10+ - GET GRAPHICS BITMAP BUFFER AX = 050Fh Return: DX = segment of graphics bitmap buffer Desc: get the address of graphics bitmap buffer for video modes 60h and 61h SeeAlso: AX=0500h"Corona" --------V-100580----------------------------- INT 10 - VIDEO - PCjr, Tandy 1000 - GET CRT/CPU PAGE REGISTERS AX = 0580h Return: BH = CRT page register BL = CPU page register 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 SeeAlso: AH=05h"SET CRT/CPU" --------V-1005------------------------------- INT 10 - VIDEO - PCjr, Tandy 1000 - SET CRT/CPU PAGE REGISTERS AH = 05h AL = subfunction 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 Return: nothing 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 SeeAlso: AX=0580h --------V-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 Return: nothing Note: affects only the currently active page (see AH=05h) BUGS: some implementations (including the original IBM PC) have a bug which destroys BP the Trident TVGA8900CL (BIOS dated 1992/9/8) clears DS to 0000h when scrolling in an SVGA mode (800x600 or higher) SeeAlso: AH=07h,AH=12h"Tandy 2000",AH=72h,AH=73h,AX=7F07h,INT 50/AX=0014h --------V-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 Return: nothing Note: affects only the currently active page (see AH=05h) BUGS: some implementations (including the original IBM PC) have a bug which destroys BP the Trident TVGA8900CL (BIOS dated 1992/9/8) clears DS to 0000h when scrolling in an SVGA mode (800x600 or higher) SeeAlso: AH=06h,AH=12h"Tandy 2000",AH=72h,AH=73h,INT 50/AX=0014h --------V-1008------------------------------- INT 10 - VIDEO - READ CHARACTER AND ATTRIBUTE AT CURSOR POSITION AH = 08h BH = page number (00h to number of pages - 1) (see #00010) Return: AH = character's attribute (text mode only) (see #00014) AH = character's color (Tandy 2000 graphics mode only) 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 the foreground intensity bit (3) can be programmed to switch between character sets A and B on EGA and VGA cards, thus enabling 512 simultaneous characters on screen. In this case the bit's usual function (intensity) is regularly turned off. in graphics modes, only characters drawn with white foreground pixels are matched by the pattern-comparison routine on the Tandy 2000, BH=FFh specifies that the current page should be used because of the IBM BIOS specifications, there may exist some clone BIOSes which do not preserve SI or DI; the Novell DOS kernel preserves SI, DI, and BP before many INT 10h calls to avoid problems due to those registers not being preserved by the BIOS. BUG: some IBM PC ROM BIOSes destroy BP when in graphics modes SeeAlso: AH=09h,AX=1003h,AX=1103h,AH=12h/BL=37h,AX=5001h Bitfields for character's display attribute: Bit(s) Description (Table 00014) 7 foreground blink or (alternate) background bright (see also AX=1003h) 6-4 background color (see #00015) 3 foreground bright or (alternate) alternate character set (see AX=1103h) 2-0 foreground color (see #00015) SeeAlso: #00026 (Table 00015) Values for character color: Normal Bright 000b black dark gray 001b blue light blue 010b green light green 011b cyan light cyan 100b red light red 101b magenta light magenta 110b brown yellow 111b light gray white --------V-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 #00010) background color in 256-color graphics modes (ET4000) BL = attribute (text mode) or color (graphics mode) if bit 7 set in <256-color graphics mode, character is XOR'ed onto screen CX = number of times to write character Return: nothing 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 With PhysTechSoft's PTS ROM-DOS the BH, BL, and CX values are ignored on entry. SeeAlso: AH=08h,AH=0Ah,AH=4Bh"GRAFIX",INT 17/AH=60h,INT 1F"SYSTEM DATA" SeeAlso: INT 43"VIDEO DATA",INT 44"VIDEO DATA" --------V-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 #00010) background color in 256-color graphics modes (ET4000) BL = attribute (PCjr, Tandy 1000 only) or color (graphics mode) if bit 7 set in <256-color graphics mode, character is XOR'ed onto screen CX = number of times to write character Return: nothing 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 With PhysTechSoft's PTS ROM-DOS the BH and CX values are ignored on entry. SeeAlso: AH=08h,AH=09h,AH=11h"Tandy 2000",AH=4Bh,INT 17/AH=60h SeeAlso: INT 1F"SYSTEM DATA",INT 43"VIDEO DATA",INT 44"VIDEO DATA" --------V-100B--BH00------------------------- INT 10 - VIDEO - SET BACKGROUND/BORDER COLOR AH = 0Bh BH = 00h BL = background/border color (border only in text modes) Return: nothing SeeAlso: AH=0Bh/BH=01h --------V-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 Return: nothing Note: this call was only valid in 320x200 graphics on the CGA, but newer cards support it in many or all graphics modes SeeAlso: AH=0Bh/BH=00h,MEM 0040h:0066h --------V-100B--BH02------------------------- INT 10 - Tandy 2000 - VIDEO - SET PALETTE ENTRY AH = 0Bh BH = 02h BL = palette entry number AL = new color value for palette entry Return: nothing Note: this interrupt is identical to INT 52 for Tandy 2000 SeeAlso: INT 10/AH=00h,INT 10/AH=0Bh/BH=01h,INT 52"Tandy 2000" --------V-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 except in 256-color modes CX = column DX = row Return: nothing Desc: set a single pixel on the display in graphics modes Notes: valid only in graphics modes BH is ignored if the current video mode supports only one page SeeAlso: AH=0Dh,AH=46h --------V-100D------------------------------- INT 10 - VIDEO - READ GRAPHICS PIXEL AH = 0Dh BH = page number CX = column DX = row Return: AL = pixel color Desc: determine the current color of the specified pixel in grahics modes Notes: valid only in graphics modes BH is ignored if the current video mode supports only one page SeeAlso: AH=0Ch,AH=47h --------V-100E------------------------------- INT 10 - VIDEO - TELETYPE OUTPUT AH = 0Eh AL = character to write BH = page number BL = foreground color (graphics modes only) Return: nothing Desc: display a character on the screen, advancing the cursor and scrolling the screen as necessary Notes: characters 07h (BEL), 08h (BS), 0Ah (LF), and 0Dh (CR) are interpreted and do the expected things IBM PC ROMs dated 1981/4/24 and 1981/10/19 require that BH be the same as the current active page BUG: if the write causes the screen to scroll, BP is destroyed by BIOSes for which AH=06h destroys BP SeeAlso: AH=02h,AH=06h,AH=0Ah --------b-100E--CXABCD----------------------- INT 10 - V20-XT-BIOS - TELETYPE OUTPUT WITH ATTRIBUTE AH = 0Eh CX = ABCDh BP = ABCDh AL = character to write BH = page number BL = foreground color (text modes as well as graphics modes) Return: nothing Program: V20-XT-BIOS is a ROM BIOS replacement with extensions by Peter Koehlmann / c't magazine Desc: display a character on the screen, advancing the cursor and scrolling the screen as necessary Notes: characters 07h (BEL), 08h (BS), 0Ah (LF), and 0Dh (CR) are interpreted and do the expected things SeeAlso: INT 15/AH=84h"V20-XT-BIOS" --------V-100F------------------------------- INT 10 - VIDEO - GET CURRENT VIDEO MODE AH = 0Fh Return: AH = number of character columns AL = display mode (see #00010 at 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 HP 200LX returns AL=07h (monochrome) if mode was set to AL=21h and always 80 resp. 40 columns in all text modes regardless of current zoom setting (see AH=D0h) when using a Hercules Graphics Card, additional checks are necessary: mode 05h: if WORD 0040h:0063h is 03B4h, may be in graphics page 1 (as set by DOSSHELL and other Microsoft software) mode 06h: if WORD 0040h:0063h is 03B4h, may be in graphics page 0 (as set by DOSSHELL and other Microsoft software) mode 07h: if BYTE 0040h:0065h bit 1 is set, Hercules card is in graphics mode, with bit 7 indicating the page (mode set by Hercules driver for Borland Turbo C) the Tandy 2000 BIOS is only documented as returning AL, not AH or BH SeeAlso: AH=00h,AH=05h,AX=10F2h,AX=1130h,AX=CD04h,MEM 0040h:004Ah --------V-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 = width 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 #00016) ??? Return: ??? Program: VUIMAGE is a shareware GIF/TIFF image viewer by Offe Enterprises Note: the use of TSR display drivers was discontinued after v2.20 Index: installation check;VUIMAGE display driver Format of record for VUIMAGE Function 04h: Offset Size Description (Table 00016) 00h WORD row number 02h WORD starting column??? 04h WORD ending column??? ??? --------V-100F--SIF123----------------------- INT 10 - FRIEZE v7.41+ - INSTALLATION CHECK AH = 0Fh SI = F123h DI = 321Fh Return: AH = number of character columns AL = display mode (see #00010 at AH=00h) BH = active page (see AH=05h) SI = DI = F345h if installed 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=0Fh"VIDEO",AH=4Bh"FRIEZE" --------V-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 Program: BWE is a TSR by John J. Seal published in May 1986 Dr. Dobb's Journal Note: when a window has been set, all output via AH=0Eh is restricted to the specified window SeeAlso: AH=11h"Window",AH=12h"Window" --------V-1010------------------------------- INT 10 - VIDEO - Eagle PC2 BIOS Rev. C - SET SCROLL SPEED AH = 10h AL = speed 00h fast 01h slow (scrolling only moves characters during vertical retrace) Return: AH = previous speed --------V-1010------------------------------- INT 10 - Tandy 2000 - VIDEO - GET/SET CHARACTER FONTS AH = 10h AL = control value bit 0: set character set instead of reading it bit 1: high 128 characters instead of low 128 characters ES:BX -> new character set if AL bit 0 set Return: ES:BX -> current character set if AL bit 0 clear on entry Notes: this interrupt is identical to INT 52 on Tandy 2000 the character set consists of 16 bytes for each of the 128 characters, where each of the 16 bytes describes the pixels in one scan line, most significant bit leftmost SeeAlso: AH=00h,AH=0Bh/BH=02h,AH=11h"Tandy 2000",AH=12h"Tandy 2000" SeeAlso: INT 52"Tandy 2000" --------V-101000----------------------------- INT 10 - VIDEO - SET SINGLE PALETTE REGISTER (PCjr,Tandy,EGA,MCGA,VGA) AX = 1000h BL = palette register number (00h-0Fh) = attribute register number (undocumented) (see #00017) BH = color or attribute register value Return: nothing 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 (Table 00017) Values for attribute register number: 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 --------V-101001----------------------------- INT 10 - VIDEO - SET BORDER (OVERSCAN) COLOR (PCjr,Tandy,EGA,VGA) AX = 1001h BH = border color (00h-3Fh) Return: nothing 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 --------V-101002----------------------------- INT 10 - VIDEO - SET ALL PALETTE REGISTERS (PCjr,Tandy,EGA,VGA) AX = 1002h ES:DX -> palette register list (see #00018) BH = 00h to avoid problems on some adapters Return: nothing 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 (Table 00018) 00h 16 BYTEs colors for palette registers 00h through 0Fh 10h BYTE border color SeeAlso: #00461 --------V-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 BH = 00h to avoid problems on some adapters Return: nothing Notes: although there is no function to get the current status on adapters prior to the VGA, bit 5 of 0040h:0065h indicates the state; on the VGA, use AH=1Bh and check offset 2Dh of the returned data (see #00040) when configured for a monochrome display, the Boca Research Multi-EGA with ROM v M1.1 Type D has its screen disrupted if BH is not clear this call is reported to be "Get Cursor Position" on the Tandy 1000SL/TL SeeAlso: AH=08h,AH=1Bh --------V-101007----------------------------- INT 10 - VIDEO - GET INDIVIDUAL PALETTE REGISTER (VGA,UltraVision v2+) AX = 1007h BL = palette or attribute (undoc) register number (see #00017) Return: BH = palette or attribute register value Note: 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 --------V-101008----------------------------- INT 10 - VIDEO - READ OVERSCAN (BORDER COLOR) REGISTER (VGA,UltraVision v2+) AX = 1008h Return: BH = border color (00h-3Fh) Note: (see AX=1007h) SeeAlso: AX=1001h --------V-101009----------------------------- INT 10 - VIDEO - READ ALL PALETTE REGISTERS AND OVERSCAN REGISTER (VGA) AX = 1009h ES:DX -> 17-byte buffer for palette register list (see #00018) Return: nothing Note: 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 --------V-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) Return: nothing SeeAlso: AX=1012h,AX=1015h --------V-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) Return: nothing SeeAlso: AX=1010h,AX=1017h,INT 62/AX=00A5h --------V-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) Return: nothing Note: this function is not valid in mode 13h SeeAlso: AX=101Ah --------V-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 AX destroyed by some BIOSes (e.g. Tseng ET4000 B