ZX81 software serial port (was Re: ZX81 I/O ports)

From: Stan Barr <stanb_at_dial.pipex.com>
Date: Sun Mar 24 03:43:44 2002

Hi,

"Glen Goodwin" <acme_ent_at_bellsouth.net> said:
> > From: Stan Barr <stanb_at_dial.pipex.com>
>
> > Hmm...I did my ZX81 serial port in software! It was only used to
> > transfer data to the host computer, so it was pretty simple...
>
> Stan, I would really appreciate it if you would share this solution with
> me, assuming you still have the code.
>

Sorry, I can't find *any* of my ZX-81 software ;-( There's a folder
somewhere with all my notes and listings in, but where?? (I've got
way too much junk!)

It drove an 8255 port using a mixture of Forth and assembler code I
filched from a book. Only ran at about 110 bps, but it was enough
for what I was doing.

These days, I'd probably just hitch up a standard UART...

-- 
Cheers,
Stan Barr  stanb_at_dial.pipex.com
The future was never like this!
Received on Sun Mar 24 2002 - 03:43:44 GMT

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