2.5.3Interrupt assignments

IRQ

Standard function

0System timer

1Standard 101/102-key or Microsoft Natural PS/2 Keyboard

4Communications Port (COM1)*

6Standard floppy disk controller

8System CMOS/real-time clock

9Microsoft ACPI-compliant system

12 PS/2 compatible mouse port

13 Numeric data processor

11 NVIDIA nForce PCI System Management

16 NVIDIA GeForce 6800 Series GPU

18 VIA OHCI Compliant IEEE 1394 Host Controller

20 NVIDIA Network Bus Enumerator

20 Standard Enhanced PCI to USB Host Controller

22 Microsoft UAA Bus Driver for High Definition Audio

22 NVIDIA nForce Serial ATA Controller

23 NVIDIA nForce Serial ATA Controller

23 Standard OpenHCD USB Host Controller

IRQ assignments for this motherboard

 

A

B

C

D

E

F

G

H

PCI_1

fixed

–

–

–

–

–

–

–

PCI_2

–

fixed

–

–

–

–

–

–

USB 1.1

–

–

–

–

–

–

–

–

USB 2.0

–

–

–

–

–

–

–

–

IDE controller

–

–

–

–

–

–

–

–

HD audio

–

–

–

–

–

–

–

–

PCIEx16_1

–

–

–

–

fixed

–

–

–

PCIEx16_2

–

–

 

–

–

shared

–

–

PCIEx1_1

–

–

–

–

–

–

fixed

–

PCIEx1_2

–

–

–

–

 

shared

–

–

SATA1

–

–

–

–

–

–

–

–

SATA2

–

–

–

–

–

–

–

–

LAN

–

–

–

–

–

–

–

–

1394

–

–

fixed

–

–

–

–

–

2-20

Chapter 2: Hardware information