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System I/O Addresses
I/O Address
System Function (Shipping Configuration)
(Hex)
000 - 00F
DMA Controller no. 1
010 - 01F
Unused
020 - 021
Interrupt Controller no. 1
022 - 024
Opti Chipset Configuration registers
025 - 03F
Unused
02E - 02F
87334 "Super IO" configuration for CPU
040 - 043
Counter/Timer Registers
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 - 07F
Unused
080 - 08F
DMA Page Registers
090 - 091
Unused
092
Port A
093 - 09F
Unused
0A0 - 0A1
Interrupt Controller no. 2
0A2 - 0BF
Unused
0C0 - 0DF
DMA Controller no. 2
0E0 - 0EF
Unused
0F0 - 0F1
Coprocessor Busy Clear/Reset
0F2 - 0FF
Unused
100 - 16F
Unused
170 - 177
Secondary Fixed Disk Controller
178 - 1EF
Unused
1F0 - 1F7
Primary Fixed Disk Controller
1F8 - 200
Unused
Table 6-15
Specifications
Continued
6-13
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