1.8.1 Standard i nterrupt assi gnments

IRQPriorityStandard Function

0

1

System Timer

1

2

Keyboard Controller

2

N/A

Programmable Interrupt

3*

11

IRQ holder for PCI steering

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.

1.8.2 I RQ assi gnments for thi s motherboard

 

A

B

C

D

E

F

G

H

PCI slot 1

shared

—

—

—

—

—

—

—

PCI slot 2

—

shared

— — — — — —

PCI slot 3

—

—

shared

—

—

—

—

—

PCIe x1 slot 1

shared

—

—

—

—

—

—

—

PCIe x1 slot 2

shared

—

—

—

—

—

—

—

PCIe x16 slot

shared

—

—

—

—

—

—

—

Onboard USB controller 1

—

—

—

—

used

—

—

—

Onboard USB controller 2

—

—

—

—

—

used

—

—

Onboard USB controller 3

—

—

—

—

—

—

used

—

Onboard USB 2.0 controller

—

—

—

—

—

—

—

used

Onboard LAN

—

—

—

used

—

—

—

—

Onboard Audio

—

—

shared

—

—

—

—

—

Serial ATA

—

shared

—

—

—

—

—

—

 

 

 

 

 

 

 

 

 

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.

ASUS M2S-X

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