Compaq Deskpro EP Series of Personal Computers
6-3
6.1.3
DMA
Hardware DMA System Function
DMA 0
Unused
DMA 1
Audio (Alternate = DMA 0 or 3)
DMA 2
Diskette Drive
DMA 3
ECP Parallel Port LPT1 (Default; Alternate = DMA 0)
DMA 4
DMA Controller Cascading (Not on ISA Bus)
DMA 5
Unused
DMA 6
Unused
DMA 7
Unused
6.1.4
I/O
I/O Address (Hex)System Function (Shipping Configuration)
000 - 00F
DMA Controller # 1
010 - 01F
Unused
020 - 03F
Interrupt Controller # 1
040 - 043
Counter/Timer
044 - 05F
Unused
060
Keyboard Controller
061
Port B
062 - 063
Unused
064
Keyboard Controller
065 - 06F
Unused
070 - 071
NMI Enable/Real-Time Clock
072 - 077
CMOS Storage
078 - 07F
Unused
080 - 08F
DMA Page Registers
090 - 091
Unused
092
Port A
093 - 09F
Unused
0A0 - 0BF
Interrupt Controller # 2
0C0 - 0DF
DMA Controller # 2
0E0 - 0EB
Unused
0EC - 0ED
483 Configuration Index/Data
0EE - 0EF
483 Fast A20/Fast Reset
0F0 - 0F1
Co-Processor Busy Clear/Reset
0F2 - 0F3
Unused
0F4 - 0F5
483 CPU Speed Slow/Fast
0F6 - 0F8
Unused
0F9
483/PGL Configuration Lock
Continued
Summary of Contents for Deskpro EP 6233
Page 1: ...Compaq Deskpro EP Series of Personal Computers Maintenance Service Guide ...
Page 2: ...Guide to Features Upgrades Compaq Deskpro EP Series of Personal Computers ...
Page 20: ...2 2 Spare Parts 2 1 System Unit 2 1 1 System Unit 440BX System Unit Spare Parts 440BX Model ...
Page 22: ...2 4 Spare Parts 2 1 2 System Unit Intel 810 810e System Unit Spare Parts Intel 810 810e Model ...
Page 24: ...2 6 Spare Parts 2 2 Mass Storage Devices Mass Storage Devices ...
Page 26: ...2 8 Spare Parts 2 3 Cables Cables ...
Page 28: ...2 10 Spare Parts 2 4 Standard and Optional Boards Standard and Optional Boards ...
Page 30: ...2 12 Spare Parts Standard and Optional Boards continued ...
Page 126: ...134011 004 181099 001 ...