System I/O address specifications
I/O address (hex)
000 - 00F
010 - 01F
020 - 021
022 - 024
025 - 03F
02E - 02F
040 - 05F
044 - 05F
060
061
062 - 063
064
065 - 06F
070 - 071
072 - 07F
080 - 08F
090 - 091
092
093 - 09F
0A0 - 0A1
I/O Address (hex)
0A2 - 0BF
0C0 - 0DF
0E0 - 0EF
0F0 - 0F1
0F2 - 0FF
100 - 16F
170 - 177
178 - 1EF
1F0 - 1F7
1F8 - 200
201
202 - 21F
92
Chapter 6 Specifications
System function (shipping configuration)
DMA controller no. 1
Unused
Interrupt controller no. 1
Opti chipset configuration registers
Unused
87334 "Super I/O" configuration for CPU
Counter/timer registers
Unused
Keyboard controller
Port B
Unused
Keyboard controller
Unused
NMI enable/RTC
Unused
DMA page registers
Unused
Port A
Unused
Interrupt controller no. 2
System Function (shipping configuration)
Unused
DMA controller no. 2
Unused
Coprocessor busy clear/reset
Unused
Unused
Secondary fixed disk controller
Unused
Primary fixed disk controller
Unused
JoyStick (decoded in ESS1688)
Unused