Xerox 820 documentation.

[Dwight K. Elvey]

>From: "Giuseppe Sarno" <gsarno at nortel.com>
>
>Hi I own an Old Xerox 820 machine,
>Can anyone help to find documentation for it ?
>Also is there a way to download programs onto it using the serial/parallel
>port ?
>
>I have seen some info at
>http://www.classiccmp.org/pipermail/cctech/2002-September/002642.html
><http://www.classiccmp.org/pipermail/cctech/2002-September/002642.html>  but
>I couldn't find more.
>
>Thanks.
>

Hi
 You didn't mention if you have a disk that boots and
has PIP under CP/M on it. If you do, you can transfer
information as ASCII like a BASIC source program or even
transfer .COM files by first converting them to .HEX
files and then using DDT on the 820 to move them
to .COM files.
 If you are attempting to bootstrap with no disk, you'll
have to check with others. One may be able to do it
if it has a built in debug monitor.
 Of course, on can always write some of ones own code
and replace one of the internal EPROMs. It is not
as impossible as it sounds. You just have to explore
a little.
Dwight