User Manual version 2207

C: System I/O Ports

 

Address range (Hex)

Device

000-01F

DMA controller

020-021

Interrupt controller 1, master

022-023

Chipset address

040-05F

8254 timer

060-06F

8024 keyboard controller

070-07F

Real time clock, non-maskable

 

interrupt mask (NMI)

080-09F

DMA page register

0A0-0BF

Interrupt controller 2

0C0-0DF

DMA controller

0F0

Clear math co-processor

0F1

Reset math co-processor

0F8-0FF

Math co-processor

1F0-1F8

Fixed disk

200-207

Game Port (not used)

443

Watchdog timer

143

Watchdog timer

208

DIO port

2E8

Serial port #4

2F8-2FF

Serial port #2

300-31F

Prototype card (not used)

330-331

MPU-401 Compatible

360-36F

Reserved

378-37F

Parallel printer port 1 (LPT1)

380-38F

SDLC, bisynchronous 2 (not used)

3A0-3AF

Bisynchronous 1 (not used)

3B0-3BF

Monochrome display and printer

 

adapter (LPT1) (not used)

3C0-3CF

Reserved

3D0-3DF

Color/graphics monitor adapter

3E8

Serial port #3

3F0-3F7

Diskette controller

3F8-3FF

Serial port #1

9-172

APOLLO 120/150 III

Page 182
Image 182
Apollo 150, 120 user manual Address range Hex Device