6–28
Maintenance and Service Guide
Specifications
I/O Address
(hex)
System Function
(shipping configuration)
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
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 6-24
System I/O Addresses
(Continued)