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APPENDIX
I/O Address map
Address
0000 – 000F
0020 - 0021
0040 - 0043
0060
0061
0062, 0064, 0066
0070 – 0071
0072 – 0073
0080
0081 – 008F
00A0 – 00A1
00B2 – 00B3
00C0 – 00DF
Function
Controller
Interrupt controller
Timer 1
Keyboard controller
Speaker
Keyboard controller command and status
Real time clock & NMI mask
Extended CMOS access
Diagnostic port
DMA page register
Interrupt controller
Power Management control
DMA controller
OWNER'S HANDBOOK
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