APPENDIX

Appendix

A. I/O Port Address Map

B. Interrupt Request Lines (IRQ)

A. I/O Port Address Map

Each peripheral device in the system is assigned a set of I/O port addresses which 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

278 - 27F

Parallel Port #2(LPT2)

2F8h - 2FFh

Serial Port #2(COM2)

2B0 - 2DF

Graphics adapter Controller

378h - 3FFh

Parallel Port #1(LPT1)

360 - 36F

Network Ports

3B0 - 3BF

Monochrome & Printer adapter

3C0 - 3CF

EGA adapter

3D0 - 3DF

CGA adapter

3F0h - 3F7h

Floppy Disk Controller

3F8h - 3FFh

Serial Port #1(COM1)

I815E User’s Manual

75

Page 79
Image 79
Intel I815E user manual O Port Address Map Interrupt Request Lines IRQ, Address Device Description