Compaq Deskpro EN Series User Manual

Compaq Deskpro EN Series of Personal Computers 8-3
8.1.4 System I/O
I/O Address
(Hex)
System Function
(Shipping Configuration)
I/O Address
(Hex)
System Function
(Shipping Configuration)
000 - 00F DMA Controller # 1 170 - 177 Reserved
010 - 01F Unused 178 - 1EF Unused
020 - 03F Interrupt Controller # 1 1F0 - 1F7 Fixed Disk Controller
040 - 043 Counter/Timer 1F8 - 1FF Unused
044 - 05F Unused 200 Unused
060 Keyboard Controller 201 Unused
061 Port B 202 - 21F Unused
062 - 063 Unused 220 - 22F Audio (Default)
(Alt = 240 - 24F, 250- 25F)
064 Keyboard Controller 230 - 277 Unused
065 - 06F Unused 278 - 27F Reserved Parallel Port
070 - 071 NMI Enable/Real-Time Clock 280 - 2E7 Unused
072 - 07F Unused 2E8 - 2EF Reserved Serial Port
080 - 08F DMA Page Registers 2F0 - 2F7 Unused
090 - 091 Unused 2F8 - 2FF Reserved Serial Port
092 Port A 300 - 317 Unused
093 - 09F Unused 318 - 319 Unused
0A0 - 0BF Interrupt Controller # 2 31A - 36F Unused
0C0 - 0DF DMA Controller # 2 330 - 331 Audio
0E0 - 0EB Unused 370 - 377 Reserved
0EC - 0ED 483 Configuration Index/Data 378 - 37F Parallel Port (Primary)
0EE - 0EF 483 Fast A20/Fast Reset 380 - 387 Unused
0F0 - 0F1 Co-Processor Busy Clear/Reset 388 - 38B FM Synthesizer (OPL III)
0F2 - 0F3 Unused 38C - 397 Unused
0F4 - 0F5 483 CPU Speed Slow/Fast 398 - 399 Super AI/O Index/Data (Default)
(Alt = 26EH, 15CH, 02EH)
0F6 - 0F8 Unused 39A - 3AF Unused
0F9 483/PGL Configuration Lock 3B0 - 3BB MDA, EGA/VGA
0FA Unused 3BC - 3BF Reserved (Parallel Port)
0FB 483/PGL Configuration Unlock 3C0 - 3DF EGA/VGA
0FC - 0FF Unused 3E0 - 3E7 Unused
100 - 12F Unused 3E8 - 3EF Reserved (Serial Port)
130 - 131 Unused 3F0 - 3F7 Diskette Controller
132 - 16F Unused 3F8 - 3FF Serial Port (Primary)

Compaq Deskpro EN Series Specifications

General

Brand	Compaq
Model	Deskpro EN Series
Category	Desktop
Language	English