2.5.3Interrupt assignments

Standard interrupt assignments

IRQ

Priority

Standard function

0

1

System Timer

1

2

Keyboard Controller

2

–

Redirect 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

* These IRQs are usually available for ISA or PCI devices.

IRQ assignments for this motherboard

 

A

B

C

D

E

F

G

H

PCI Slot 1

 

shared

 

 

 

 

 

 

PCI Slot 2

 

 

shared

 

 

 

 

 

On board 1394

shared

 

 

 

 

 

 

 

PCIe x16 slot 1

shared

 

 

 

 

 

 

 

PCIe x16 slot 2

 

 

 

 

 

shared

 

 

PCIe x1 slot 1

 

 

 

 

 

 

shared

 

PCIe x1 slot 2

 

 

 

 

shared

 

 

 

2.5.4PCI slots

The PCI slots support cards such as a LAN card, SCSI card, USB card, and other cards that comply with PCI specifications. Refer to the figure below for the location of the slots.

ASUS M2N-ESLI

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