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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 # 2
0A2 - 0BF Unused
0C0 - 0DF DMA Controller # 2
0E0 - 0EF Unused
0F0 - 0F1 Coprocessor Busy Clear/Reset
0F2 - 0FF Unused
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I/O Address (Hex) System Function (Shipping Configuration)
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100 - 16F Unused
170 - 177 Secondary Fixed Disk Controller
178 - 1EF Unused
1F0 - 1F7 Primary Fixed Disk Controller
1F8 - 200 Unused
201- 202 Joystick (Decoded in ESS1688)
203 - 21F Unused