Original Apple II (not + or e or other) - test-drb@ccmp.vtda.org

24 Aug 2000

bit banging was most common to the 6502 world, most of the other
systems used real UART/USARTs.  I think it was the idea of software
was cheaper than hardware.  Most of the bit bashers seems to live on the
low end of the performance spectrum for their time.

Allison

-----Original Message-----
From: Cameron Kaiser &lt;spectre(a)stockholm.ptloma.edu&gt;
To: classiccmp(a)classiccmp.org &lt;classiccmp(a)classiccmp.org&gt;
Date: Thursday, August 24, 2000 1:04 PM
Subject: Re: Original Apple II (not + or e or other)

...
 > > Believe me, after you've tried to use
this card seriously you (a) wish
...
 > > for a real serial card with a 6850 or 6551 on
it and (b) want to do
> > unprintable things to the designers...
>
> 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. 
I always found that one of the dumbest ideas Commodore came up with
(emulating the 6551 in software). It's not like it couldn't have been
built into the computer; the Plus/4 has a real live 6551 driving its
user port and it does fabulously well.

--
----------------------------- personal page: 
http://www.armory.com/~spectre/ --
...
  Cameron Kaiser, Point Loma Nazarene University *
ckaiser(a)stockholm.ptloma.edu
...
 -- Those are my principles. If you don't like them,
I have others. -- G. Marx -