Date   : Thu, 09 Mar 2006 12:20:37 +0000
From   : Jules Richardson <julesrichardsonuk@...>
Subject: Dragon copro (was: Re: Warning: Sad case on list!)

Jonathan Graham Harston wrote:
>> article published way back when for using a Dragon 64 as a DIY 6809 copro.
>  
> I've tried looking for this. Interlibrary Loan won't lend
> periodicals. They will photocopy pages *if* you tell them what
> pages to photocopy.
>  
> Now, if I knew what page the contents were on...

First part is "Electronics and Computing", August 1985, pages 10 - 13. I've 
got the mag in front of me...

(actually, I may have it scanned already, will look later)

What I don't have yet is the second part in the following month's issue - it's 
*somewhere* at Bletchley but I've not unearthed it yet (a few years ago we got 
chucked out of the building we were in and everything got rapidly dumped in 
alternate storage - things are only now at the stage we've got a secured 
future, so can get proper sorted archives back together again. Grr!)

Interesting thing about the article is that it says: "Next Month TUBE software 
and how to customise FLEX to operate across the TUBE". That suggests to me 
that someone else's off-the-peg FLEX was used and then the article gives 
details of how to path the I/O routines. Maybe it actually lists the patches 
in the article, giving me hope that maybe suitable donor FLEX software is 
around somewhere...

I've got a Dragon 64 lined up in case the software ever surfaces :-)

Schematics for the TUBE link are in the article that I have - just uses an 
8255 rather than TUBE ULA...

cheers

Jules