Asus M2V-X Motherboard Installation Guide - Page 38

2-16

Chapter 2: Hardware information

2.5.3

Interrupt assignments

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

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


11*

6


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

A

B

C

D

E

F

G

H

PCI slot 1

shared

—

—

—

—

—

—

—

PCI slot 2

—

shared

—

—

—

—

—

PCI slot 3

—

—

shared

—

—

—

—

—

PCI slot 4

—

—

—

shared

—

—

—

—

PCI Express x1

—

—

—

—

—

—

—

shared

PCI Express x16

—

—

—

—

—

—

—

shared

Gigabit LAN

—

—

—

—

—

—

—

shared

SATA

—

shared

—

—

—

—

—

—

USB1

shared

—

—

—

—

—

—

—

USB2

—

shared

—

—

—

—

—

—

USB3

—

—

shared

—

—

—

—

—

USB4

—

—

—

shared

—

—

—

—

HD audio

—

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.

Asus M2V-X Motherboard Installation Guide - Page 38

Interrupt assignments

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