System input/output addresses

This table shows the hexadecimal addresses for each of the system board Input/ Output (I/O) functions. You may want to use this information if you install an adapter card that requires you to set I/O addresses.

Table 3: System input/output addresses

Address range

Function

(hexadecimal)

 

 

 

000-00F

DMA controller-1

 

 

020-021

Interrupt controller-1

 

 

040-043

System timer

 

 

060-060

Keyboard controller 8742

 

 

061-061

System Speaker

 

 

070-071

CMOS RAM Address and Real Time Clock

 

 

081-08F

DMA controller-2

 

 

0A0-0A1

Interrupt controller-2

 

 

0C0-0DF

DMA controller-2

 

 

0F0-0FF

Math Co-Processor

 

 

170-177

Secondary IDE

 

 

1F0-1F7

Primary IDE

 

 

200-207

Game Port

 

 

278-27F

Parallel Printer Port 2

 

 

2F8-2FF

Serial Asynchronous Port 2

 

 

378-37F

Parallel Printer Port 1

 

 

3F0-3F5

Floppy Disk Controller

 

 

3F6-3F6

Secondary EIDE

 

 

A-4IBM Personal Computer User Guide

Page 172
Image 172
IBM 2194, 6345, 2193 manual System input/output addresses