2.6.4Standard interrupt assignments

 

IRQ

Priority

Standard Function

 

0

1

System Timer

 

1

2

Keyboard Controller

 

2

N/A

Programmable Interrupt

 

3*

11

USB Universal Host Controller

 

4*

12

Communications Port (COM1)

 

5*

13

Onboard Audio

 

6

14

Standard 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

Onboard LAN

 

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.

2.6.5IRQ assignments for this motherboard

 

 

 

A

B

C

D

E

F

G

H

 

 

 

 

 

 

 

 

 

 

 

 

PCI slot

 

used

—

—

—

—

—

—

—

 

USB 1.1 UHCI 1

—

—

—

—

shared

—

—

—

 

USB 1.1

UHCI 1

—

—

—

—

—

used

—

—

 

USB 1.1

UHCI 1

—

—

—

—

—

—

shared

—

 

USB 2.0

EHCI

—

—

—

—

—

—

—

used

 

Onboard Audio

—

—

—

—

—

—

shared

—

 

Onboard LAN

—

—

—

—

shared

—

—

—

 

 

 

 

 

 

 

 

 

 

 

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Chapter 2: Basic Installation