20 Sep
2006
20 Sep
'06
10:05 a.m.
I've so far run at 1200 baud, I think it's
good for somewhere between
2400 and 9600 baud, from what I've read, but am not sure. I gather
some tricks are needed to get much faster than 2400 out of a C64 User
port. Others here would know a lot more than me about this.
There are some bitbanger routines that entirely bypass NMIs and busy-drive
the user port. Obviously they completely occupy the CPU and are no good
for interactive applications, but they work well for file-transfers. Over5
(google for it) is one of these.
128s in 2MHz mode can drive the user port at 9600 using custom software.
DesTerm and NovaTerm both have this capability.
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Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com
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