Compaq Presario,Presario 900 Maintenance And Service Manual page 167

Specifications
I/O Address (hex)
0A2 - 0BF
0C0 - 0DF
0E0 - 0EF
0F0 - 0F1
0F2 - 0FF
100 - 16F
170 - 177
178 - 1EF
1F0 - 1F7
1F8 - 200
201
202 - 21F
220 - 22F
230 - 26D
26E - 26
278 - 27F
280 - 2AB
2A0 - 2A7
2A8 - 2E7
2E8 - 2EF
6–16
Table 6-14
System I/O Addresses (Continued)
System Function (shipping configuration)
Unused
DMA controller no. 2
Unused
Coprocessor busy clear/reset
Unused
Unused
Secondary fixed disk controller
Unused
Primary fixed disk controller
Unused
Joystick (decoded in ESS1688)
Unused
Entertainment audio
Unused
Unused
Unused
Unused
Unused
Unused
Reserved serial port
Maintenance and Service Guide