DEC DECpc LPx User Manual

Digital DECpc LPx/LPx+ Device Mapping
MCS Logistics Engineering - Nijmegen 85
I/O Address Map (LPx/LPx+)
Range (hexadecimal)
Function
000 - 00F
DMA controller one
020 - 021
Interrupt controller one
022
Index register (85C461)
023
Data register (85C461)
040 - 043
Interval timer
060 - 06F
Keyboard controller
070 - 07F
Real-time clock (RTC), NMI
080 - 08F
DMA page register
0A0 - 0A1
Interrupt controller two
0C0 - 0CF
DMA controller two
0F0
Clear math coprocessor busy
0F1
Reset math coprocessor
0F8 - 0FF
Math coprocessor
1F0 - 1F7
IDE controller
278 - 27A
LPT2
2E8 - 2EF
COM4
2F8 - 2FF
COM2
378 - 37A
LPT1
3BC - 3BE
LPT3
3E8 - 3EF
COM3
3B0 - 3DF
VGA registers
3F0 - 3F7
Diskette controller
3F6 - 3F7
IDE controller (alt status, device address)
3F8 - 3FF
COM1
CPU I/O Address Map (LPx 560/566)
Range (hexadecimal)
Function
0000 to 0CF7
PCI I/O space
0CF8
Configuration space enable register
0CF9
Turbo and reset control register
0CFA to BFFF
PCI I/O space
C000 to CFFF
PCI configuration space
D000 to FFFF
PCI I/O space

DEC DECpc LPx Specifications

General

Brand	DEC
Model	DECpc LPx
Category	Desktop
Language	English