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 PCI devices.

IRQ assignments for this motherboard

 

A

B

C

D

E

F

G

H

PCIE1_1

–

–

shared

–

–

–

–

–

PCIE1_2

–

–

–

shared

–

–

–

–

PCIE16_1

shared

–

–

–

–

–

–

–

PCIE16_2

shared

–

–

–

–

–

–

–

PCIE16_3

shared

–

–

–

–

–

–

–

LAN (8056)

–

shared

–

–

–

–

–

–

LAN (8001)

–

–

shared

–

–

–

–

–

Marvell 6121

shared

–

–

–

–

–

–

–

PCI_1

shared

–

–

–

–

–

–

–

PCI_2

–

shared

–

–

–

–

–

–

USB controller 1

–

–

–

–

–

–

–

shared

USB controller 2

–

–

–

shared

–

–

–

–

USB controller 3

–

–

shared

–

–

–

–

–

USB controller 4

shared

–

–

–

–

–

–

–

USB controller 5

shared

–

–

–

–

–

–

–

USB controller 6

–

–

–

–

–

shared

–

–

USB 2.0 controller 1

–

–

–

–

–

–

–

shared

USB 2.0 controller 2

–

–

shared

–

–

–

–

–

SATA controller 1

–

–

shared

–

–

–

–

–

SATA controller 2

–

–

–

shared

–

–

–

–

Audio Azalia

–

–

–

–

–

–

shared

–

ASUS P5Q Deluxe

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