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Standard interrupt assignments, Irq assignments for this motherboard – Asus P2-P5945GC User Manual

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ASUS P1/P2-P5945GC

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

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.

Standard interrupt assignments

IRQ

Standard Function

0

System Timer

1

Keyboard Controller

2

Re-direct to IRQ#9

3

IRQ holder for PCI steering*

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

IRQ holder for PCI steering*

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

Secondary IDE Channel

IRQ assignments for this motherboard

A

B

C

D

E

F

G

H

PCI slot 1

shared —

PCI slot 2

— 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 port

shared —

Onboard HD audio

— shared —

Onboard LAN

shared —

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