2.5.3Interrupt assignments

Standard interrupt assignments

IRQ

Priority

Standard function

0

1

System Timer

1

2

Keyboard Controller

2

–

Redirect to IRQ#9

4

12

Communications Port (COM1)*

5

13

IRQ Holder for PCI Steering*

6

14

Floppy Disk Controller

7

15

Reserved

8

3

System CMOS/Real Time Clock

9

4

IRQ Holder for PCI Steering*

10

5

IRQ Holder for PCI Steering*

11

6

IRQ Holder for PCI Steering*

12

7

Reserved

13

8

Numeric Data Processor

14

9

Primary IDE Channel

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

IRQ assignments for this motherboard

 

A

B

C

D

E

F

G

H

PCIE x16_1

shared

shared

shared

shared

–

–

–

–

PCIE x16_2

shared

shared

shared

shared

–

–

–

–

USB 1.0 controller 1

–

–

–

shared

–

–

–

–

USB 1.0 controller 2

–

–

–

shared

–

–

–

–

USB 1.0 controller 3

–

–

–

shared

–

–

–

–

USB 1.0 controller 4

–

–

–

shared

–

–

–

–

USB 2.0 controller

–

–

–

shared

–

–

–

–

HD audio

shared

–

–

–

–

–

–

–

Onboard SATA

–

–

–

–

 

shared

–

–

ASUS M3N-HD/HDMI

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