DEC DECpc 433 User Manual

Device Mapping
Table D-2. 1/0 Address Map
Range
Function
(in hex)
OOO:OOF
OMA controller one
020:03F Interrupt controller one
040:043
Programmable interval timer
060:06F
Keyboard (61 port B)
070:07F Real-time Clock (RTC), NMI
080:09F DMA page register
OAO:OBF
Interrupt controUer two
OCO:ODF
DMA controller two
DEC 82340 configuration index register
OED 82340 configuration data register
DEE FastA20
OEF
Fast reset
OFO
Clear numeric coprocessor busy
OFl Reset numeric coprocessor
GF8
Numeric coprocessor
OF9
82340 configuration disable
OFA Numeric coprocessor
I OFB I 82340 configuration enable
D-2 DECpc 433 Workstation Service Guide

DEC DECpc 433 Specifications

General

Brand	DEC
Model	DECpc 433
Category	Desktop
Language	English