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6–14 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 6-12
System I/O Addresses
(Continued)