Standard interrupt assignments

 

I R Q

Priority

Standard Function

 

0

1

System Timer

 

1

2

Keyboard Controller

 

2

Ð

Re-direct to IRQ#9

 

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 ISA or PCI devices.

IRQ assignments for this motherboard

 

A

B

C

D

PCI slot 1

used

Ñ

Ñ

Ñ

PCI slot 2

Ñ

used

Ñ

Ñ

IEEE 1394

Ñ

Ñ

Ñ

shared

 

 

 

 

 

When using PCI cards on shared slots, ensure that the drivers support ÒShare IRQÓ 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 A8N-VM CSM

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