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8-4 Specifications
Table 8-5
System I/O
I/O Address (Hex) System Function (Shipping Configuration)
000 - 00F DMA Controller # 1
010 - 01F Unused
020 - 03F Interrupt Controller # 1
040 - 043 Counter/Timer
044 - 05F Unused
060 Keyboard Controller
061 Port B
062 - 063 Unused
064 Keyboard Controller
065 - 06F Unused
070 - 071 NMI Enable/Real-Time Clock
072 - 07F Unused
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
178 - 1EF Unused
1F0 - 1F7 Fixed Disk Controller
1F8 - 1FF Unused
200 Unused
201 Unused
Continued