I/O Address Map

I/O Address

Function

 

 

0000-001F

DMA controller

 

 

0020-0029, 002C-002D

Programmable interrupt controller

 

 

002E-002F

PCI bus

 

 

0030-0031, 0034-0035, 0038-0039,

Programmable interrupt controller

003C-003D

 

 

 

0040-0043, 0050-0053

System timer

 

 

0060, 0064

Keyboard controller

 

 

0062, 0066

ACPI-Compliant Embedded Controller

 

 

0070-0077

System CMOS/real time clock

 

 

0081-0091, 0093-009F

DMA controller

 

 

00A0-00A1, 00A4-00A5, 00A8-00A9,

Programmable interrupt controller

00AC-00AD, 00B0-00B5, 00B8-00B9,

 

00BC-00BD

 

 

 

00C0-00DF

DMA controller

 

 

00F0-00F0

Numeric data processor

 

 

0170-0177, 0376

2nd EIDE device (optical drive) select

 

 

01F0-01F7, 03F6

1st EIDE device (hard drive) select

 

 

0274-0277, 0279, 0A79

ISAPNP Read Data Port

 

 

02F8-02FF

IrDA FIR

 

 

03B0-03BB, 03C0-03DF, 1800-1807

Video Controller

 

 

03F0-03F5, 03F7

Standard Floppy Disk Controller

 

 

04D0-04D1

Programmable interrupt controller

 

 

0D00-FFFF

PCI bus

 

 

1810-181F

Ultra ATA Storage Controller

 

 

1820-187F

USB Universal Host Controller

 

 

1881-189F

SMBus Controller

 

 

18C0-18FF, 1C00-1CFF

Audio Controller

 

 

2000-207F, 2400-24FF

Modem Controller

 

 

3000-30FF

Ethernet Controller

 

 

FC00-FFFF

Compatible CardBus Controller

 

 

IRQ Assignment Map

 

Interrupt Channel

Function (Hardware)

 

 

IRQ00

System timer

 

 

IRQ01

Keyboard

 

 

IRQ03

IrDA FIR/PCI candidate

 

 

IRQ04

COM1/PCI candidate

 

 

IRQ05

PCI candidate

 

 

IRQ06

Reserved

 

 

IRQ07

LPT (Parallel port)/PCI Candidate

 

 

IRQ08

CMOS/RTC

 

 

IRQ09

SCI IRQ used by ACPI

 

 

Chapter 1

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Acer VD.T39V1.001 manual Address Map, IRQ Assignment Map, Address Function, Interrupt Channel Function Hardware