beautypg.com

Appendix, A. i/o port address map – IBASE MI950 User Manual

Page 62

background image

APPENDIX

58

MI950 User’s Manual



Appendix

A. I/O Port Address Map

Each peripheral device in the system is assigned a set of I/O port
addresses that also becomes the identity of the device. The following
table lists the I/O port addresses used.

Address

Device Description

000h - 01Fh

DMA Controller #1

020h - 03Fh

Interrupt Controller #1

040h - 05Fh

Timer

060h - 06Fh

Keyboard Controller

070h - 07Fh

Real Time Clock, NMI

080h - 09Fh

DMA Page Register

0A0h - 0BFh

Interrupt Controller #2

0C0h - 0DFh

DMA Controller #2

0F0h

Clear Math Coprocessor Busy Signal

0F1h

Reset Math Coprocessor

1F0h - 1F7h

IDE Interface

278h - 27Fh

Parallel Port #2(LPT2)

2F8h - 2FFh

Serial Port #2(COM2)

2B0h - 2DFh

Graphics adapter Controller

378h - 3FFh

Parallel Port #1(LPT1)

360h - 36Fh

Network Ports

3B0h - 3BFh

Monochrome & Printer adapter

3C0h - 3CFh

EGA adapter

3D0h - 3DFh

CGA adapter

3F0h - 3F7h

Floppy Disk Controller

3F8h - 3FFh

Serial Port #1(COM1)