Compaq AP200 Maintenance And Service Manual page 119

Hardware IRQ System Function
IRQ 0 System timer
IRQ 1 Keyboard (Not on ISA Bus)
IRQ 2 Unused
IRQ 3 Serial Port (COM 2)
IRQ 4 Serial Port (COM 1)
IRQ 5 Unused
IRQ 6 Diskette Drive
IRQ 7 Parallel Port (LPT 1)
IRQ 8 Real-time clock
IRQ 9 ESS sound chip
IRQ 10 Unused
IRQ 11 PCI Interrupts
IRQ 12 Mouse
IRQ 13 Non-catastrophic errors / CPU error
IRQ 14 IDE Controller
IRQ 15 CD-ROM
Table 7-2
System Interrupts
Compaq Professional Workstation AP200 Maintenance and Service Guide
7-3