Interrupt assignments

IRQ

Standard function

0High precision event timer

1Standard 101/102-Key or Microsoft Natural PS/2 keyboard

4Communications Port (COM1)*

6Standard floppy disk controller

8High precision event timer

9Microsoft ACPI-Compliant System

12 PS/2 Compatible Mouse

13 Numeric data processor

16 Microsoft UAA Bus Driver for High Definition Audio

16 Standard OpenHCD USB Host Controller

17 Standard OpenHCD USB Host Controller

17 Standard OpenHCD USB Host Controller

18 ATI Radeon Xpress 1200 Series

18 Standard OpenHCD USB Host Controller

18 Standard OpenHCD USB Host Controller

19 Realtek RTL8168/8111 PCI-E Gigabit Ethernet NIC

19 Standard Enhanced PCI to USB Host Controller

22 Standard Dual Channel PCI IDE Controller

*These IRQs are usually available for ISA or PCI devices.

IRQ assignments for this motherboard

 

A

B

C

D

PCI slot 1

used

–

–

–

PCI slot 2

–

used

–

–

When using PCI cards on shared slots, ensure that the drivers support “Share IRQ” or that the cards do not need IRQ assignments; otherwise, conflicts will arise between the two PCI groups, making the system unstable and the card inoperable.

ASUS M2A-VM

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