Services Interrupts Pointers ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ 10H Video services 00H Division by 0 1bH Keyboard break 11H Equipment list 01H Single-step 1cH User timer interrupt 12H Conv. memory size 02H Non-Maskable 1dH Video parms 13H Disk I/O 03H Breakpoint 1eH Diskette parms 14H Serial port I/O 04H Overflow 1fH Graphics chars 15H AT services; APM 05H Print screen 16H Keyboard I/O 06H Invalid opcode 22H Terminate addr 17H Printer I/O 07H no math chip 23H Ctrl+Break addr 18H ROM-BASIC 08H IRQ 0 Timer 24H Critical Error addr 19H Bootstrap 09H IRQ 1 Keyboard 1aH Time I/O; MRCI hook 0aH IRQ 2 cascade 40H diskette revector 0bH IRQ 3 COM 2/4 41H hard disk 0 parms 20H-2fH: DOS Interrupts 0cH IRQ 4 COM 1/3 46H hard disk 1 parms 0dH IRQ 5 LPT 2 2fH: Multiplex Services 0eH IRQ 6 diskette 43H EGA font table 0fH IRQ 7 LPT 1 31H DPMI services 4aH User alarm address 33H Mouse Support 70H IRQ 8 RT Clock 67H Expanded Memory Fns 71H IRQ 9 redir IRQ 2 72H IRQ 10 (reserved) 73H IRQ 11 (reserved) 74H IRQ 12 (reserved) 75H IRQ 13 math chip 76H IRQ 14 hard disk 77H IRQ 15 (reserved) See Also: IRQs: Hardware Interrupts DOS Functions API Service Index DOS & BIOS Data Structures BIOS Data Area -♦-