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3 interrupt assignments, Standard interrupt assignments, Irq assignments for this motherboard – Asus SK8V User Manual

Page 38: 16 chapter 2: hardware information

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2-16

Chapter 2: Hardware information

Standard Interrupt Assignments

IRQ

Priority

Standard Function

0

1

System Timer

1

2

Keyboard Controller

2

N/A

Programmable Interrupt

3*

11

Communications Port (COM2)

4*

12

Communications Port (COM1)

5*

13

Sound Card (sometimes LPT2)

6

14

Floppy Disk Controller

7*

15

Printer Port (LPT1)

8

3

System CMOS/Real Time Clock

9*

4

ACPI Mode when used

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.

IRQ assignments for this motherboard

PCI INT A

PCI INT B

PCI INT C

PCI INT D

PCI slot 1

shared

PCI slot 2

shared

PCI slot 3

shared

PCI slot 4

shared

PCI slot 5

shared

AGP slot

shared

Onboard RAID

shared

Onboard 1394

shared

Onboard LAN

shared

WiFi slot

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.

2.5.3 Interrupt assignments