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3 interrupt assignments, Standard interrupt assignments, Irq assignments for this motherboard – Asus P5GC-VM Pro User Manual

Page 34

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1-22

Chapter 1: Product introduction

1.8.3

Interrupt assignments

Standard interrupt assignments

IRQ

Standard Function

0

System Timer

1

Keyboard Controller

2

Re-direct to IRQ#9

3

COM2

4

Communications Port (COM1)

5

IRQ holder for PCI steering*

6

Floppy Disk Controller

7

Printer Port (LPT1)*

8

System CMOS/Real Time Clock

9

Microsoft ACPI-Compliant system

10

IRQ holder for PCI steering*

11

IRQ holder for PCI steering*

12

PS/2 Compatible Mouse Port*

13

Numeric Data Processor

14

Primary IDE Channel

15

Slave IDE

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

IRQ assignments for this motherboard

A

B

C

D

E

F

G

H

PCI slot 1

— shared —

PCI slot 2

— shared —

PCI Express X1 slot

shared —

PCI Express x16 slot

shared —

Onboard USB controller 1

— shared —

Onboard USB controller 2

— shared

Onboard USB controller 3

shared —

Onboard USB controller 4

— shared —

Onboard USB 2.0 controller

— shared —

Onboard IDE controller

— shared —

Onboard SATA controller

— shared

Onboard SMBus controller

— shared

Onboard Azalia controller

— shared —

Onboard VGA

shared —

Onboare LAN 8111C

— shared

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.