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 |
===========================================================================
I/O Address (Hex) System Function (Shipping Configuration)
===========================================================================
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 |