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November 2005 703t server description
Part 2: 703t Server Hardware Installation 21
IRQ mapping table
The following table lists the assignments for each Interrupt Request (IRQ).
You do not need this information for installation, but it may be useful for
troubleshooting.
Interrupt I/O APIC level Slot or device
INTR INT0 Processor interrupt
IRQ0 INT2 Timer (from PIIX4)
IRQ1 INT1 PS/2 keyboard controller
IRQ2 Not
applicable
Internal/reserved
Note: IRQ2 is actually shared with IRQ9 as a
cascade interrupt to support IRQs 8–15.
IRQ3 INT3 Onboard serial port B (COM2)
IRQ4 INT4 Onboard serial port A (COM1)
IRQ5 INT5 Available
IRQ6 INT6 Floppy disk drive controller
IRQ7 INT7 Parallel port 1(LPT1)
IRQ8 INT8 Real Time Clock
IRQ9 INT9 Available
IRQ10 INT10 Available
IRQ11 INT11 Available
IRQ12 INT12 PS/2 mouse
IRQ13 INT13 Internal/reserved