7-5
Compaq Professional Workstation AP200 Maintenance and Service Guide
System I/O
Continued
I/O Address (Hex)
System Function (Shipping Configuration)
080 - 08F
DMA Page Registers
090 - 091
Unused
092
Port A
093 - 09F
Unused
0A0 - 0BF
Interrupt Controller # 2
0C0 - 0DF
DMA Controller # 2
0E0 - 0EB
Unused
0EC - 0ED
483 Configuration Index/Data
0EE - 0EF
483 Fast A20/Fast Reset
0F0 - 0F1
Co-Processor Busy Clear/Reset
0F2 - 0F3
Unused
0F4 - 0F5
483 CPU Speed Slow/Fast
0F6 - 0F8
Unused
0F9
483/PGL Configuration Lock
0FA
Unused
0FB
483/PGL Configuration Unlock
0FC - 0FF
Unused
100 - 12F
Unused
130 - 131
Modem PGL Index/Data (Default; Alt = 140h, 260h, 270h)
132 - 16F
Unused
170 - 177
Reserved; IDE Controller can be set here in Setup.
15C - 15D
Super I/O Index/Data Register
178 - 1EF
Unused
Continued