2 Chapter

2.5.3Interrupt assignments

Standard interrupt assignments

IRQ

Priority Standard function

01 System Timer

12 Keyboard Controller

2– Redirect to IRQ#9

412 Communications Port (COM1)*

513 IRQ Holder for PCI Steering*

614 Floppy Disk Controller

7

15

Reserved

83 System CMOS/Real Time Clock

94 IRQ Holder for PCI Steering*

105 IRQ Holder for PCI Steering*

116 IRQ Holder for PCI Steering*

127 Reserved

138 Numeric Data Processor

149 Primary IDE Channel

*These IRQs are usually available for PCI devices.

IRQ assignments for this motherboard

IOH

 

24

25

26

27

28

29

30

31

PCIE16_1

shared

PCIE16_2

shared

PCIE16_3

shared

ICH

 

A

B

C

D

E

F

G

H

PCIE1_1

shared

 

LAN

shared

PCI_1

shared

PCI_2

shared

USB controller 1

shared

USB controller 2

shared

USB controller 3

shared

USB controller 4

shared

USB controller 5

shared

USB controller 6

shared

USB 2.0 controller 1

shared

USB 2.0 controller 2

shared

SATA controller 1

shared

SATA controller 2

shared

Audio Azalia

shared

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Chapter 2: Hardware information