Physical and Operating Specifications
7-5
Table 7-4
System I/O
continued
I/O Address (Hex) System Function (Shipping Configuration)
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; alternate = 140h, 260h, 270h)
132 - 16F Unused
170 - 177 Reserved; IDE controller can be set here in Setup.
178 - 1EF Unused
1F0 - 1F7 Fixed disk controller
1F8 - 1FF Unused
200 Unused
201 Unused
202 - 21F Unused
220 - 22F Business Audio (default; alternate = 230h, 240h, 250h)
230 - 277 Unused
238 - 2EF Reserved serial port
278 - 27F Reserved parallel port
280 - 2E7 Unused
continued
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