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[Provided by Bent Lynggaard <lynggaard@risoe.dk>. Last Edit 6/5/94] This list is a brief description of each of the 256 interrupts. Each description begins with "INT nn " where "nn" is a two digit hexadecimal number 00 - FF. For automatic processing, do not rely on the order being consecutive. --------!---TITLES--------------------------- INT 00 - CPU-generated - DIVIDE ERROR INT 01 - CPU-generated - SINGLE STEP; (80386+) - DEBUGGING EXCEPTIONS INT 02 - external hardware - NON-MASKABLE INTERRUPT INT 03 - CPU-generated - BREAKPOINT INT 04 - CPU-generated - INTO DETECTED OVERFLOW INT 05 - PRINT SCREEN; CPU-generated (80186+) - BOUND RANGE EXCEEDED INT 06 - CPU-generated (80286+) - INVALID OPCODE INT 07 - CPU-generated (80286+) - PROCESSOR EXTENSION NOT AVAILABLE INT 08 - IRQ0 - SYSTEM TIMER; CPU-generated (80286+) INT 09 - IRQ1 - KEYBOARD DATA READY; CPU-generated (80286,80386) INT 0A - IRQ2 - LPT2/EGA,VGA/IRQ9; CPU-generated (80286+) INT 0B - IRQ3 - SERIAL COMMUNICATIONS (COM2); CPU-generated (80286+) INT 0C - IRQ4 - SERIAL COMMUNICATIONS (COM1); CPU-generated (80286+) INT 0D - IRQ5 - FIXED DISK/LPT2/reserved; CPU-generated (80286+) INT 0E - IRQ6 - DISKETTE CONTROLLER; CPU-generated (80386+) INT 0F - IRQ7 - PARALLEL PRINTER INT 10 - VIDEO; CPU-generated (80286+) INT 11 - BIOS - GET EQUIPMENT LIST; CPU-generated (80486+) INT 12 - BIOS - GET MEMORY SIZE INT 13 - DISK INT 14 - SERIAL INT 15 - CASSETTE INT 16 - KEYBOARD INT 17 - PRINTER INT 18 - DISKLESS BOOT HOOK (START CASSETTE BASIC) INT 19 - SYSTEM - BOOTSTRAP LOADER INT 1A - TIME INT 1B - KEYBOARD - CONTROL-BREAK HANDLER INT 1C - TIME - SYSTEM TIMER TICK INT 1D - SYSTEM DATA - VIDEO PARAMETER TABLES INT 1E - SYSTEM DATA - DISKETTE PARAMETERS INT 1F - SYSTEM DATA - 8x8 GRAPHICS FONT INT 20 - DOS 1+ - TERMINATE PROGRAM INT 21 - DOS 1+ - Function Calls INT 22 - DOS 1+ - PROGRAM TERMINATION ADDRESS INT 23 - DOS 1+ - CONTROL-C/CONTROL-BREAK HANDLER INT 24 - DOS 1+ - CRITICAL ERROR HANDLER INT 25 - DOS 1+ - ABSOLUTE DISK READ INT 26 - DOS 1+ - ABSOLUTE DISK WRITE INT 27 - DOS 1+ - TERMINATE AND STAY RESIDENT INT 28 - DOS 2+ - DOS IDLE INTERRUPT INT 29 - DOS 2+ - FAST CONSOLE OUTPUT INT 2A - NETBIOS INT 2B - DOS 2+ - RESERVED INT 2C - DOS 2+ - RESERVED INT 2D - DOS 2+ - RESERVED INT 2E - DOS 2+ - PASS COMMAND TO COMMAND INTERPRETER FOR EXECUTION INT 2F - Multiplex INT 30 - (NOT A VECTOR!) - DOS 1+ - FAR JMP instruction INT 31 - overwritten by CP/M jump instruction in INT 30 INT 32 - (no special use) INT 33 - MS MOUSE INT 34 - FLOATING POINT EMULATION - OPCODE D8h INT 35 - FLOATING POINT EMULATION - OPCODE D9h INT 36 - FLOATING POINT EMULATION - OPCODE DAh INT 37 - FLOATING POINT EMULATION - OPCODE DBh INT 38 - FLOATING POINT EMULATION - OPCODE DCh INT 39 - FLOATING POINT EMULATION - OPCODE DDh INT 3A - FLOATING POINT EMULATION - OPCODE DEh INT 3B - FLOATING POINT EMULATION - OPCODE DFh INT 3C - FLOATING POINT EMULATION - SEGMENT OVERRIDE INT 3D - FLOATING POINT EMULATION - STANDALONE FWAIT INT 3E - FLOATING POINT EMULATION - Borland "SHORTCUT" CALL INT 3F - Overlay manager interrupt (Microsoft/Borland) INT 40 - DISKETTE - RELOCATED ROM BIOS DISKETTE HANDLER INT 41 - SYSTEM DATA - HARD DISK 0 PARAMETER TABLE; CPU - MS Windows INT 42 - VIDEO - RELOCATED DEFAULT INT 10 VIDEO SERVICES (EGA,VGA) INT 43 - VIDEO DATA - CHARACTER TABLE (EGA,MCGA,VGA) INT 44 - VIDEO DATA - CHARACTER FONT (PCjr); Novell NetWare INT 45 - Z100/Acorn INT 46 - SYSTEM DATA - HARD DISK 1 DRIVE PARAMETER TABLE INT 47 - Z100/Acorn/Western Digital/SQL Base INT 48 - KEYBOARD (PCjr) - Z100/Watstar/Acorn/Western Digital/Compaq INT 49 - SYSTEM DATA (PCjr) - Z100/TI/Watstar/Acorn/MAGic INT 4A - SYSTEM - USER ALARM HANDLER INT 4B - IBM SCSI interface; Virtual DMA Specification (VDS) INT 4C - Z100/Acorn/TI INT 4D - Z100 INT 4E - TI/Z100 INT 4F - Common Access Method SCSI INT 50 - IRQ0 relocated by software INT 51 - IRQ1 relocated by software INT 52 - IRQ2 relocated by software INT 53 - IRQ3 relocated by software INT 54 - IRQ4 relocated by software INT 55 - IRQ5 relocated by software INT 56 - IRQ6 relocated by software INT 57 - IRQ7 relocated by software INT 58 - IRQ8/0 relocated by software INT 59 - IRQ9/1 relocated by software; GSS Computer Graphics Interface INT 5A - IRQ10/2 relocated by software INT 5B - IRQ11/3 relocated by software; Network INT 5C - IRQ12/4 relocated by software; Network Interface INT 5D - IRQ13/5 relocated by software INT 5E - IRQ14/6 relocated by software INT 5F - IRQ15/7 relocated by software; HP 95LX GRAPHICS PRIMITIVES INT 60 - reserved for user interrupt; multiple purposes INT 61 - reserved for user interrupt; multiple purposes INT 62 - reserved for user interrupt; multiple purposes INT 63 - reserved for user interrupt; multiple purposes INT 64 - reserved for user interrupt; multiple purposes INT 65 - reserved for user interrupt; multiple purposes INT 66 - reserved for user interrupt; multiple purposes INT 67 - reserved for user interrupt; LIM EMS; multiple purposes INT 68 - multiple purposes INT 69 - multiple purposes INT 6A - multiple purposes INT 6B - multiple purposes INT 6C - CONVERTIBLE; DOS 3.2; DECnet DOS network scheduler INT 6D - VGA - internal INT 6E - DECnet DOS - DECnet NETWORK PROCESS API INT 6F - Novell NetWare; 10NET; MS Windows 3.0 INT 70 - IRQ8 - CMOS REAL-TIME CLOCK INT 71 - IRQ9 - REDIRECTED TO INT 0A BY BIOS INT 72 - IRQ10 - RESERVED INT 73 - IRQ11 - RESERVED INT 74 - IRQ12 - POINTING DEVICE (PS) INT 75 - IRQ13 - MATH COPROCESSOR EXCEPTION (AT and up) INT 76 - IRQ14 - HARD DISK CONTROLLER (AT and later) INT 77 - IRQ15 - RESERVED (AT,PS); POWER CONSERVATION (Compaq) INT 78 - DOS extenders; multiple purposes INT 79 - multiple purposes INT 7A - Novell NetWare; IBM 3270; multiple purposes INT 7B - multiple purposes INT 7C - multiple purposes INT 7D - multiple purposes INT 7E - RESERVED FOR DIP, Ltd. ROM LIBRARY; multiple purposes INT 7F - multiple purposes INT 80 - reserved for BASIC; multiple purposes INT 81 - reserved for BASIC INT 82 - reserved for BASIC INT 83 - reserved for BASIC INT 84 - reserved for BASIC INT 85 - reserved for BASIC INT 86 - IBM ROM BASIC - used while in interpreter; multiple purposes INT 87 - IBM ROM BASIC - used while in interpreter INT 88 - IBM ROM BASIC - used while in interpreter; multiple purposes INT 89 - IBM ROM BASIC - used while in interpreter INT 8A - IBM ROM BASIC - used while in interpreter INT 8B - IBM ROM BASIC - used while in interpreter INT 8C - IBM ROM BASIC - used while in interpreter INT 8D - IBM ROM BASIC - used while in interpreter INT 8E - IBM ROM BASIC - used while in interpreter INT 8F - IBM ROM BASIC - used while in interpreter INT 90 - IBM ROM BASIC - used while in interpreter INT 91 - IBM ROM BASIC - used while in interpreter INT 92 - IBM ROM BASIC - used while in interpreter; multiple purposes INT 93 - IBM ROM BASIC - used while in interpreter INT 94 - IBM ROM BASIC - used while in interpreter; multiple purposes INT 95 - IBM ROM BASIC - used while in interpreter INT 96 - IBM ROM BASIC - used while in interpreter INT 97 - IBM ROM BASIC - used while in interpreter INT 98 - IBM ROM BASIC - used while in interpreter INT 99 - IBM ROM BASIC - used while in interpreter INT 9A - IBM ROM BASIC - used while in interpreter INT 9B - IBM ROM BASIC - used while in interpreter INT 9C - IBM ROM BASIC - used while in interpreter INT 9D - IBM ROM BASIC - used while in interpreter INT 9E - IBM ROM BASIC - used while in interpreter INT 9F - IBM ROM BASIC - used while in interpreter INT A0 - IBM ROM BASIC - used while in interpreter INT A1 - IBM ROM BASIC - used while in interpreter INT A2 - IBM ROM BASIC - used while in interpreter INT A3 - IBM ROM BASIC - used while in interpreter INT A4 - IBM ROM BASIC - used while in interpreter INT A5 - IBM ROM BASIC - used while in interpreter INT A6 - IBM ROM BASIC - used while in interpreter INT A7 - IBM ROM BASIC - used while in interpreter INT A8 - IBM ROM BASIC - used while in interpreter INT A9 - IBM ROM BASIC - used while in interpreter INT AA - IBM ROM BASIC - used while in interpreter INT AB - IBM ROM BASIC - used while in interpreter INT AC - IBM ROM BASIC - used while in interpreter INT AD - IBM ROM BASIC - used while in interpreter INT AE - IBM ROM BASIC - used while in interpreter INT AF - IBM ROM BASIC - used while in interpreter INT B0 - IBM ROM BASIC - used while in interpreter INT B1 - IBM ROM BASIC - used while in interpreter INT B2 - IBM ROM BASIC - used while in interpreter INT B3 - IBM ROM BASIC - used while in interpreter INT B4 - IBM ROM BASIC - used while in interpreter INT B5 - IBM ROM BASIC - used while in interpreter INT B6 - IBM ROM BASIC - used while in interpreter INT B7 - IBM ROM BASIC - used while in interpreter INT B8 - IBM ROM BASIC - used while in interpreter INT B9 - IBM ROM BASIC - used while in interpreter INT BA - IBM ROM BASIC - used while in interpreter INT BB - IBM ROM BASIC - used while in interpreter INT BC - IBM ROM BASIC - used while in interpreter INT BD - IBM ROM BASIC - used while in interpreter INT BE - IBM ROM BASIC - used while in interpreter INT BF - IBM ROM BASIC - used while in interpreter INT C0 - IBM ROM BASIC - used while in interpreter INT C1 - IBM ROM BASIC - used while in interpreter INT C2 - IBM ROM BASIC - used while in interpreter INT C3 - IBM ROM BASIC - used while in interpreter INT C4 - IBM ROM BASIC - used while in interpreter INT C5 - IBM ROM BASIC - used while in interpreter INT C6 - IBM ROM BASIC - used while in interpreter INT C7 - IBM ROM BASIC - used while in interpreter INT C8 - IBM ROM BASIC - used while in interpreter INT C9 - IBM ROM BASIC - used while in interpreter INT CA - IBM ROM BASIC - used while in interpreter INT CB - IBM ROM BASIC - used while in interpreter INT CC - IBM ROM BASIC - used while in interpreter INT CD - IBM ROM BASIC - used while in interpreter INT CE - IBM ROM BASIC - used while in interpreter INT CF - IBM ROM BASIC - used while in interpreter INT D0 - IBM ROM BASIC - used while in interpreter INT D1 - IBM ROM BASIC - used while in interpreter INT D2 - IBM ROM BASIC - used while in interpreter INT D3 - IBM ROM BASIC - used while in interpreter INT D4 - IBM ROM BASIC - used while in interpreter INT D5 - IBM ROM BASIC - used while in interpreter INT D6 - IBM ROM BASIC - used while in interpreter INT D7 - IBM ROM BASIC - used while in interpreter INT D8 - IBM ROM BASIC - used while in interpreter INT D9 - IBM ROM BASIC - used while in interpreter INT DA - IBM ROM BASIC - used while in interpreter INT DB - IBM ROM BASIC - used while in interpreter INT DC - IBM ROM BASIC - used while in interpreter INT DD - IBM ROM BASIC - used while in interpreter INT DE - IBM ROM BASIC - used while in interpreter INT DF - IBM ROM BASIC - used while in interpreter INT E0 - IBM ROM BASIC - used while in interpreter; multiple purposes INT E1 - IBM ROM BASIC - used while in interpreter INT E2 - IBM ROM BASIC - used while in interpreter INT E3 - IBM ROM BASIC - used while in interpreter INT E4 - IBM ROM BASIC - used while in interpreter INT E5 - IBM ROM BASIC - used while in interpreter INT E6 - IBM ROM BASIC - used while in interpreter INT E7 - IBM ROM BASIC - used while in interpreter INT E8 - IBM ROM BASIC - used while in interpreter INT E9 - IBM ROM BASIC - used while in interpreter INT EA - IBM ROM BASIC - used while in interpreter INT EB - IBM ROM BASIC - used while in interpreter INT EC - IBM ROM BASIC - used while in interpreter INT ED - IBM ROM BASIC - used while in interpreter INT EE - IBM ROM BASIC - used while in interpreter INT EF - BASIC - ORIGINAL INT 09 VECTOR INT F0 - BASICA.COM, GWBASIC, compiled BASIC - ORIGINAL INT 08 VECTOR INT F1 - reserved for user interrupt INT F2 - reserved for user interrupt INT F3 - reserved for user interrupt INT F4 - reserved for user interrupt INT F5 - reserved for user interrupt INT F6 - reserved for user interrupt INT F7 - reserved for user interrupt INT F8 - reserved for user interrupt INT F9 - reserved for user interrupt INT FA - reserved for user interrupt INT FB - reserved for user interrupt INT FC - reserved for user interrupt INT FD - reserved for user interrupt INT FE - AT/XT286/PS50+ - destroyed by return from protected mode INT FF - AT/XT286/PS50+ - destroyed by return from protected mode