I/O Address Map

I/O Address

Function

 

 

4D0-4D1

PCI configuration register

CF8-CFF

 

 

 

IRQ Assignment Map

Interrupt Channel

Function(Hardware)

 

 

IRQ00

System Timer

 

 

IRQ01

Keyboard

 

 

IRQ03

IrDA Fast Infrared Port

 

 

IRQ04

Communications Port (COM1)

 

 

IRQ05

LAN, USB

 

 

IRQ06

Free

 

 

IRQ07

Free

 

 

IRQ08

System CMOS / realtime clock

 

 

IRQ09

SCI IRQ used by ACPI bus, Wireless LAN

 

 

IRQ10

USB, Modem, VGA, MultiMedia Bay, 1394, Audio

 

 

IRQ11

O2 Micro Smart CardBus Reader

 

 

IRQ12

Synaptics PS/2 port pointing device

 

 

IRQ13

Numeric data processor

 

 

IRQ14

1st EIDE device (hard disk)

 

 

IRQ15

2nd EIDE device (CD-ROM drive)

 

 

DMA Channel Assignment

 

 

 

DMA Channel

Function (Hardware)

 

 

DRQ0

Reserved

 

 

DRQ1

IrDA Fast Infrared Port

 

 

DRQ2

Reserved

 

 

DRQ3

ECP printer port (LPT1)

 

 

DRQ4

DMA controller

 

 

DRQ5

Reserved

 

 

DRQ6

Reserved

 

 

DRQ7

Reserved

 

 

Chapter 1

31

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Image 39
Acer VD.T25V7.001 manual IRQ Assignment Map, DMA Channel Assignment