[Coco] Bitbanger I/O routines?

[Mark D. Overholser]

On 06-Feb-18 10:07, Allen Huffman wrote:
<<SNIP>>
> 
> I’d like to come up with a very simple bitbanger I/O routine for a
> micro BBS in BASIC. I think hooking to output is pretty simple (there
> are some POKEs you can do then everything that PRINTs goes out the
> printer port, too). For input, I figured I could make a routine that
> would just expect X characters (or ENTER), and only look for input
> when called. I had a BBS that used this approach (not using LINE
> INPUT or INKEY$).
> 
> Does anyone have any bitbanger examples that might be useful for
> something like this?
> 
> How fast can the CoCo 1/2 go? I have seen 9600 baud on the CoCo 3
> bitbanger in Twilight Term.
> 
> — Allen
> 
> 
> 

A couple years ago when I was looking into Bit-Banger Routines for 
linking to the Lantronix UDS-10 boxes, I was directed to this page:

<http://www.cs.unc.edu/~yakowenk/coco.html>


Look at the
COMM4 @ 9600bps
and
COMM6 @ 38400BPS


These routines require that the Full Attention of the CoCo be dedicated 
to reading the Bit-Banger port..

MarkO