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Appendix

MI958 User’s Manual 49

Appendix

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

278h - 27Fh Parallel Port #2(LPT2)

2E8h – 2EFh Serial Port #4(COM4)

2F8h - 2FFh Serial Port #2(COM2)

2B0h- 2DFh Graphics adapter Controller

360h - 36Fh Network Ports

3B0h - 3BFh Monochrome & Printer adapter

3C0h - 3CFh EGA adapter

3D0h - 3DFh CGA adapter

3E8h – 3EFh Serial Port #3(COM3)

3F8h - 3FFh Serial Port #1(COM1)

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Ibase MI958 Manual de usuario Pagina 53