Compaq AP550 Compaq Professional Workstation AP550 Maintenance & Service G - Page 159
Table 7-2, System Interrupts, Hardware IRQ, System Function
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Hardware IRQ IRQ 0 IRQ 1 IRQ 2 IRQ 3 IRQ 4 IRQ 5 IRQ 6 IRQ 7 IRQ 8 IRQ 9 IRQ 10 IRQ 11 IRQ 12 IRQ 13 IRQ 14 IRQ 15 Physical and Operating Specifications 7-3 Table 7-2 System Interrupts System Function System timer Keyboard Unused Serial port (COM 2) Serial port (COM 1) ESS sound chip Diskette drive Parallel port (LPT 1) Real-time clock Assigned to ACPI unless ACPI is disabled in F10 setup. Unused PCI interrupts Mouse Non-catastrophic errors/CPU error IDE controller CD-ROM
Physical and Operating Specifications
7-3
Table 7-2
System Interrupts
Hardware IRQ
System Function
IRQ 0
System timer
IRQ 1
Keyboard
IRQ 2
Unused
IRQ 3
Serial port (COM 2)
IRQ 4
Serial port (COM 1)
IRQ 5
ESS sound chip
IRQ 6
Diskette drive
IRQ 7
Parallel port (LPT 1)
IRQ 8
Real-time clock
IRQ 9
Assigned to ACPI unless ACPI is disabled in
F10
setup.
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