Asus M3A78-CM User Manual download pdf (Page 32)

1-20 Chapter 1: Product introduction

Interrupt assignments

IRQ Standard Function

0 System timer

1 Standard 101/102-Key or Microsoft Natural Keyboard

2 Programmable interrupt controller

3 Standard OpenHCI USB Host Controller

4 Communications Port (COM1)

5 ACPI IRQ Holder for PCI IRQ Steering

6 (free)

7 (free)

8 System CMOS/real time clock

9 SCI IRQ used by ACPI bus

10 Standard PCI Graphics Adapter (VGA)

11 (free)

12 Microsoft PS/2 Port Mouse

13 Numeric data processor

14 Primary IDE controller (single fo)

15 Secondary IDE controller (single fo)

When using PCI cards on shared slots, ensure that the drivers support “Share

IRQ” or that the cards do not need IRQ assignments; otherwise, conicts will

arise between the two PCI groups, making the system unstable and the card

inoperable.

IRQ assignments for this motherboard

A B C D E F G H

PCIE X1 slot shared - - - - - - -

PCIE X16 slot - - shared - - - - -

Onboard USB1.1 controller 1 shared - - - - - - -

Onboard USB1.1 controller 2 - - - - - - - -

Onboard USB1.1 controller 3 - - shared - - - - -

Onboard USB1.1 controller 4 - - - - - - - -

Onboard USB1.1 controller 5 - - shared - - - - -

Onboard USB2.0 controller 1 - - - - - - - -

Onboard USB2.0 controller 2 - - - - - - - -

Onboard ATI RS780 AZALIA - - shared - - - - -

Onboard IDE port shared - - - - - - -

Onboard HD audio shared - - - - - - -

Onboard LAN - - shared - - - - -

Onboard VGA - - shared - - - - -

Onchip SATA - - - - - - shared -

PCI Card1 - - - - shared - - -

PCI Card2 - - - - - shared - -

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Asus M3A78-CM User Manual Page 32