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3 interrupt assignments, Standard interrupt assignments, Irq assignments for this motherboard – Asus P5SD2-VM User Manual

Page 32

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1-20

Chapter 1: Product introduction

1.8.3

Interrupt assignments

Standard interrupt assignments

IRQ

Priority

Standard Function

0

1

System Timer

1

2

Keyboard Controller

2

3

11

IRQ holder for PCI steering

4

12

Communications Port (COM1)

5

13

Standard IRQ holder for PCI steering

6

14

Floppy Disk Controller

7

15

Printer Port (LPT1)

8

3

System CMOS/Real Time Clock

9

4

Microsoft ACPI-Compliant

10

5

IRQ holder for PCI steering*

11

6

IRQ holder for PCI steering*

12

7

PS/2 Compatible Mouse Port

13

8

Numeric Data Processor

14

9

Primary IDE Channe

* These IRQs are usually available for PCI devices.

IRQ assignments for this motherboard

A

B

C

D

E

F

G

H

PCI1

shared shared shared shared

PCI2

shared shared shared shared

PCIEX16_1

shared

PCIEX1_1

shared

Onboard USB controller 1

shared —

Onboard USB controller 2

— shared —

Onboard USB 2.0 controller

— shared —

Onboard HD audio

— shared

Onboard LAN

shared

Onboard IDE port

shared

Onboard SATA port

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.