Date   : Thu, 23 Sep 1993 17:51:00 GMT
From   : John Whistler <JOHN_W%VULCAN@...>
Subject: Second Processors

"I Stephenson" <ian@...> writes:
> Anyone looked seriously at BUILDING a second processor? Can you get
> the ULA?  Does anyone have a definative idea of the tube protocol?

Several years ago, ETI had an article on building a 6502 2nd processor
for the Electron; I believe it also worked on the beeb. There was also a
couple of articles in Electronics & Computing Monthly on using the
Dragon-64 as a 6809 2nd processor. I still have a copy of the E&CM
articles, but I'm not sure if I kept the ETI one.

        John W.