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Technical Reference
C168P User’s Manual A-3
PC I/O Port Address Map
The following is the list of the I/O port addresses commonly used, which is good for
preventing I/O address conflict when configuring C168P.
IO/ Address Device
000-01F DMA controller 1
020-03F interrupt controller
040-05F Timer
060-06F Keyboard
070-07F Real-time clock
080-09F DMA page register
0A0-0BF Interrupt controller 2
0C0-0DF DMA controller
0F0-0FF Math coprocessor
100-1EF not usable
1F0-1F8 Fixed disk
200-207 Game I/O
278-27F Parallel printer port 2 ( LP2: )
2F8-2FF Serial Port 2 ( COM2: )
300-31F Prototype card
360-36F Reserved
378-37F Parallel printer port 1 ( LP1: )
3B0-3BF Monochrome display
3C0-3CF Reserved
3D0-3DF Color graphics display
3F0-3F7 Diskette controller
3F8-3FF Serial port 1 ( COM 1: )