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Specifications
Maintenance and Service Guide 6–15
I/O Address
(hex)
System Function
(shipping configuration)
0A2 - 0BF Unused
0C0 - 0DF DMA controller 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
201 Joystick (decoded in ESS1688)
202 - 21F Unused
220 - 22F Entertainment audio
230 - 26D Unused
26E - 26 Unused
278 - 27F Unused
280 - 2AB Unused
2A0 - 2A7 Unused
2A8 - 2E7 Unused
2E8 - 2EF Reserved serial port
Table 6-14
System I/O Addresses
(Continued)