Compaq AP500 User Manual
Page 137
7-4
Physical and Operating Specifications
Table 7-4
System I/O
I/O Address (Hex)
System Function (Shipping Configuration)
000 - 00F
DMA Controller # 1
010 - 01F
Motherboard
020 - 03F
Interrupt controller # 1
040 - 043
Counter/timer registers
044 - 04F
Unused
050 - 052
Motherboard
053 - 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 - 079
Motherboard
07A - 07F
Unused
080 - 08F
DMA Page registers
090 - 09F
Motherboard
0A0 - 0BF
Interrupt controller # 2
0C0 - 0DF
DMA Controller # 2
0E0 - 0EF
Unused
0F0 - 0FF
Co-processor
100 - 15B
Unused
15C - 15D
Super I/O index/data register
15E - 16F
Unused
170 - 177
Fixed disk controller
178 - 1EF
Unused
1F0 - 1F7
Reserved - fixed disk controller
1F8 - 200
Unused
Continued