> > The C-64 comes with 1200-baud bit-banging in ROM. That's why we did it
> > that way. UARTS are much nicer (having later aquired a Super Serial Card),
> > but not all micros had them.
>
> Yes, but the C64/C128 have an expansion bus. It's not hard to hook up a
> 6551. In fact it would take me less time to do that (and I have a
> suitable chip in the junk box) than it would take me to debug the
> bitbanging routines...
Not only not hard, but already done. The CMD SwiftLinks and Turbo232s are
nothing more than 6551 ACIAs mapped to appear at either $DE00 or $DF00
in the memory map (ditto for Datapumps, etc.)
> The P500 has a real serial port (6551, RS232 level shifters, DB25
> connector), but few other CBM machines do :-(
The Plus/4 has a 6551, but it uses the regular weird user port.
--
----------------------------- personal page: http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University * ckaiser_at_stockholm.ptloma.edu
-- Proponents of other opinions will be merrily beaten to a bloody pulp. ------
Received on Thu Aug 24 2000 - 20:58:12 BST