Standard i nterrupt assi gnments

IRQ

Priority

Standard Function

0

1

System Timer

1

2

Keyboard Controller

2

-

Programmable interrupt

3

11

Communications Port (COM2)*

4

12

-

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

MIDI port*

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 I RQs are usuall y avail abl e for ISA or PCI devices.

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

—

—

—

—

—

PCI Express x16 slot

shared

—

—

—

—

—

—

—

PCI Express x1 slot 1

shared

—

—

—

—

—

—

—

PCI Express x1 slot 2

shared

—

—

—

—

—

—

—

Onboard USB controller 0

shared

—

—

—

—

—

—

—

Onboard USB controller 1

—

—

shared

—

—

—

—

—

Onboard USB controller 2

—

shared

—

 

—

—

—

—

Onboard USB controller 3

—

—

—

shared

—

—

—

—

Onboard EHCI controller

—

—

shared

—

—

—

—

—

Onboard SATA Controller

—

shared

—

—

—

—

—

—

Onboard Audio Controller

—

shared

—

—

—

—

—

—

Onboard LAN

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 A8V-XE

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