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
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