1.8.3 I nterrupt assi gnments Standard i nterrupt assi gnments

IRQ

Priority

Standard Function

0

1

System Timer

1

2

Keyboard Controller

2

—

Re-direct to IRQ#9

4

12

Communications Port (COM1)*

5

13

IRQ holder for PCI steering*

6

14

Floppy Disk Controller

7

15

Printer Port (LPT1)*

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

PS/2 Compatible Mouse Port*

13

8

Numeric Data Processor

14

9

Primary IDE Channel

15

10

Secondary IDE Channel

* These IRQs are usually available for PCI devices.

I RQ assi gnments for thi s motherboard

 

A

B

C

D

E

F

G

H

PCI Express x16 slot 1

—

—

—

—

shared

—

—

—

PCI Express x1 slot 1

—

—

—

—

shared

—

—

—

PCI Express x1 slot 2

—

—

—

—

—

used

—

—

PCI Express x1 slot 3

—

—

—

—

—

—

—

used

PCI slot 1

shared

—

—

—

—

—

—

—

PCI slot 2

—

shared

—

—

—

—

—

—

Onboard USB1.0 controller 1

shared

—

—

—

—

—

—

—

Onboard USB1.0 controller 2

—

shared

— — — — — —

Onboard USB2.0 controller

—

—

shared

—

—

—

—

—

Onboard LAN

—

—

shared

—

—

—

—

—

Onboard IDE controller

—

—

—

—

shared

—

—

—

Onboard SATA controller

shared

—

—

—

—

—

—

—

Onboard Audio controller

shared

—

—

—

—

—

—

—

1-22

Chapter 1: Product introduction