[Coco] Source code for High Speed Bit-Banger I/O

[Roger Taylor]

Ok, I spent about 15 minutes coming up with a possible 230400 bps 
block receive routine.

Tomorrow I'll be testing to see if this actually works.  This is 
115200 x 2 and requires the 2mhz CPU mode just as the 57600 bps code 
requires to achieve 115200 bps.

I noticed my PC's dial-up settings allows this speed "setting", and I 
think my USB Serial Adaptor may support it but I'm not sure yet.

I don't think the 6821 itself will register the signals that long, 
but who knows?  Also, the timing is so close that faking half-cycles 
might be required, but not possible. Cross your fingers, guys.






-- 
Roger Taylor