Interrupt Request Lines (Irq) - ROHS ITX-i7418VL User Manual

Appendix

4.2 Interrupt Request Lines (IRQ)

Peripheral devices use interrupt request lines to notify CPU for the service
required. The following table shows the IRQ used by the devices on board.
Level Function
IRQ 0 System Timer
IRQ 1 Keyboard
IRQ 2 Cascaded with IRQ 9
IRQ 3 COM2
IRQ 4 COM1
IRQ 5 AC'97
IRQ 6 Floppy Drive Controller
IRQ 7 LPT1
IRQ 8 Real Time Clock
IRQ 9 USB, ACPI
IRQ 10 USB, VGA
IRQ 11 USB, LAN
IRQ 12 PS/2 mouse or Open
IRQ 13 Math Coprocessor
IRQ 14 Primary Hard Drive controller
IRQ 15 Secondary Hard Drive controller
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