OWNER’S HANDBOOK

A APPENDIX

I/O Address map

You can change the settings used by the serial, parallel and infrared ports with the BIOS Setup utility.

Address

Device

000 – 00F

DMA controller 1

020 – 021

Interrupt controller 1

040 – 043

System timer

060

Keyboard

061

System speaker

064

Keyboard

070 – 071

Real time clock

081 – 08F

DMA page register

0A0 – 0A1

Interrupt controller 2

0C0 – 0DF

DMA controller 2

0F0 – 0FF

Numeric data processor

170 – 177

CD-ROM select

A p p e n d i x

A / 1