I/O - Compaq Deskpro EN Series Maintenance & Service Manual

7.1.4

I/O

I/O Address (Hex)
000 - 00F
010 - 01F
020 - 03F
040 - 043
044 - 05F
062 - 063
065 - 06F
070 - 071
072 - 07F
080 - 08F
090 - 091
093 - 09F
0A0 - 0BF
0C0 - 0DF
0E0 - 0EB
0EC - 0ED
0EE - 0EF
0F0 - 0F1
0F2 - 0F3
0F4 - 0F5
0F6 - 0F8
0FC - 0FF
100 - 12F
130 - 131
132 - 16F
170 - 177
178 - 1EF
1F0 - 1F7
1F8 - 1FF
202 - 21F
System Function (Shipping Configuration)
DMA Controller # 1
Unused
Interrupt Controller # 1
Counter/Timer
Unused
060 Keyboard Controller
061 Port B
Unused
064 Keyboard Controller
Unused
NMI Enable/Real-Time Clock
Unused
DMA Page Registers
Unused
092 Port A
Unused
Interrupt Controller # 2
DMA Controller # 2
Unused
483 Configuration Index/Data
483 Fast A20/Fast Reset
Co-Processor Busy Clear/Reset
Unused
483 CPU Speed Slow/Fast
Unused
0F9 483/PGL Configuration Lock
0FA Unused
0FB 483/PGL Configuration Unlock
Unused
Unused
Unused
Unused
Reserved
Unused
Fixed Disk Controller
Unused
200 Unused
201 Unused
Unused
Compaq Deskpro EN Series, Small Form Factor and Net PC Models 7-3