Date   : Sun, 07 Aug 2005 10:32:54 +0000
From   : Jules Richardson <julesrichardsonuk@...>
Subject: Re: 80186 co-pro

On Sun, 2005-08-07 at 10:23 +0100, Phil Blundell wrote:
> On Sun, 2005-08-07 at 01:01 +0100, Richard Kilpatrick wrote:
> > Does it look like this?
> > 
> > http://www.dmc12.demon.co.uk/retrotech/largeimages/80286CoPro.JPG
> 
> Ah, cool.  Yes, that's exactly it.  I see that Jules was right about
> using Master 512 ROMs, and the 40-pin socket being empty.

Well I did get the machine from Rich... ;)

It's the only ABC3xx survivor that I know of - I'd love to find someone
else who had one though. I think when talking to the ex-Acorn chap who
Rich originally got the machine from, he estimated that maybe 20 were
assembled - although it's possible serveral more boards were built (I'm
not sure what a typical low-volume production run would be) and this is
where your two 'stray' boards come from. Any serial numbers on them?

> Where does the flying lead attached to LK1 go to?

it'd go to the keyboard socket on the rear of the ABC's case. The
keyboards for the ABC machines have a switch on the back for flipping
between the B+ board and the copro board. I think the line just holds
the copro in a reset state until switched to TUBE.

I picked up another ABC210 (ACW) yesterday (unlike my existing one it's
got the mouse board and the 4MB copro), so I'm drowning in ABC goodness
at the moment...

This ACW's got a badge on the front saying Hille International (I gather
they're furniture makers) - which makes it the first case I've heard of
ACWs being used outside of Acorn themselves and educational places
(Qudos, being an Acorn spin-off, don't really count :)

cheers

Jules