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 1

–

shared

–

–

–

–

–

–

PCI 2

–

–

shared

–

–

–

–

–

Onboard 1394

shared

–

–

–

–

–

–

–

PCIE x16_1

shared

–

–

–

–

–

–

–

PCIE x16_2

–

–

–

–

–

shared

–

–

PCIE x 1_1

–

–

–

–

–

–

shared

–

PCIE x 1_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 on the next page for the location of the slots.

2.5.5PCI Express x1 slots

This motherboard supports PCI Express x1 network cards, SCSI cards and other cards that comply with the PCI Express specifications. Refer to the figure on the next page for the location of the slots.

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Chapter 2: Hardware information