Date   : Sat, 20 Sep 2003 15:53:34 +0100 (BST)
From   : Pete Turnbull <pete@...>
Subject: Re: testing 6502 copro

On Sep 20, 10:44, Jules Richardson wrote:

> Got this in an email from a friend yesterday:
>
> > I have a question about BBC co-processors. If I plug the 6502 one I
> > have into a beeb do you know how to tell if it is working?
>
> Is there a quick answer? I only got my first ever 6502 copro board a
couple of
> days ago, and have too many other projects on the go at the moment to
take a
> look at it!

The quickest way is just to press ctrl-BREAK and see what happens -- if
the 2nd processor is running it doesn't beep, and the screen shows a
different message: "Acorn TUBE 6502 64K" instead of "BBC Computer 32K".
 Also, if you PRINT ~PAGE it should show 800 instead of E00 or 1900 (or
1B00 if you have Econet too).  HIMEM become &8000 (or higher, if you
have HiBASIC installed) because the screen doesn't use memory in the
2nd Processor space.

-- 
Pete                                           Peter Turnbull
                                               Network Manager
                                               University of York