2.5.3Interrupt assignments

Standard interrupt assignments

IRQ

Priority

Standard Function

0

1

System Timer

1

2

Keyboard Controller

2

—

Re-direct to IRQ#9

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 PCI devices.

IRQ assignments for this motherboard

 

A

B

C

D

E

F

G

H

 

 

 

 

 

 

 

 

 

PCI slot 1

—

—

—

—

—

used

—

—

PCI slot 2

—

—

—

—

—

—

shared

—

PCI slot 3

—

—

—

—

—

—

—

shared

LAN(8001)

—

—

—

shared

—

—

—

—

SATA(363)

shared

—

—

—

—

—­

—

—

LAN(8056)

—

shared

— — — — — —

PCIE x16 1

shared

—

— — — — — —

PCIE x16 2

shared

—

—

— — — — —

PCIE x1

—

—

shared

— — — — —

USB controller 1

—

—

—

—

—

—

—

shared

USB controller 2

—

—

—

shared

—

—

—

—

USB controller 3

—

—

shared

— — — — —

USB controller 4

shared

—

— — — — — —

USB controller 5

—

shared

— — — — — —

USB 2.0 controller 1

—

—

—

—

—

—

—

shared

USB 2.0 controller 2

—

—

shared

— — — — —

SATA controller 1

—

—

shared

— — — — —

SATA controller 2

—

shared

—

—

—

—

—

—

2-20

Chapter 2: Hardware information