Posted By
IstvanV
on 2007-11-12
18:33:35
|  Re: +4 UserPort
The lines are both input and output. If either the input or the output is low (0V), then the level on that pin is low. See also:
http://www.zimmers.net/anonftp/pub/cbm/documents/chipdata/6529.zip
The P0 to P7 lines are directly connected to the 6529. In $FD10, bit 0 is P0, bit1 is P1, etc.
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