1.8Expansion slots

To install and configure an expansion card:

1.Install an expansion card following the instructions that came with the chassis.

2.Turn on the system and change the necessary BIOS settings, if any. See Chapter 2 for BIOS information.

3.Assign an IRQ to the card. Refer to the tables next page.

4.Install the drivers and/or software applications for the expansion card according to the card documentation.

1.8.1

Standard interrupt assignments

IRQ

Priority

Standard Function

0

1

System Timer

1

2

Keyboard Controller

2

N/A

Programmable Interrupt

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.

1.8.2 IRQ assignments for this motherboard

 

A

B

C

D

E

F

G

H

PCI slot 1

—

—

—

—

—

—

—

shared

PCI slot 2

—

—

—

—

—

—

shared

—

PCI slot 3

—

—

—

—

—

used

—

—

PCI slot 4

—

—

—

—

used

—

—

—

AGP slot

shared

—

—

—

—

—

—

—

Onboard USB controller

shared

—

used

used

—

—

—

shared

Onboard LAN

—

—

—

—

—

—

shared

—

Onboard Audio

—

used

—

—

—

—

—

—

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 P4P800S-X motherboard

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