1.8.3Interrupt assignments

Standard interrupt assignments

IRQ

Priority

Standard Function

0

1

System Timer

1

2

Keyboard Controller

2

—

Re-direct to IRQ#9

3

10

Communications Port (COM1)

4

11

IRQ holder for PCI steering*

5

12

Standard Floppy Disk Controller

6

13

Printer Port (LPT1)

7

3

System CMOS/Real Time Clock

8

4

IRQ holder for PCI steering*

9

5

IRQ holder for PCI steering*

10

6

IRQ holder for PCI steering*

11

7

PS/2 Compatible Mouse Port

12

8

Numeric Data Processor

13

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

—

—

—

—

PCI2

shared

—

—

— — — — —

PCIEX16_1

shared

—

—

— — — — —

PCIEX1_1

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 HD audio

shared

—

—

— — — — —

Onboard LAN

—

Used

—

—

—

—

—

—

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Chapter 1: Product introduction