2.5.3Interrupt assignments

Standard interrupt assignments

I R Q

Priority

Standard Function

 

0

1

System Timer

 

 

 

 

 

1

2

Keyboard Controller

 

 

 

 

 

2

—

Re-direct to IRQ#9

 

 

 

 

 

3

11

Communications Port (COM2)*

 

 

 

 

 

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.

ASUS NCL-DS Series

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