Date   : Wed, 20 Sep 2006 17:28:58 +0000
From   : Jules Richardson <julesrichardsonuk@...>
Subject: Re: 80186 board in Master

Andrew Benham wrote:
> Kris Adcock wrote:
> 
>> I've just discovered one of these in a Master that's been sat in my 
>> garage for a few months:
> 
> You've got yourself a Master 512, which is a Master with an (internal)
> 80186 co-processor.

Anyone know how many were built? I got mine years ago and despite masses of 
Acorn 'finds' since (including lots of rarities) I've never seen another M512 
(although I don't doubt that they sell on the likes of ebay every once in
a while)

Anyway, nice find! :-)

There was a memory upgrade board for them - I believe one listmember has one, 
but that's the only surviving example that I've heard about.

I've got no idea why Acorn went for the 80186 CPU; they'd already built the 
80286 copro for the B/B+ (as used in the ACW 3xx machines) so I don't know why 
they didn't make an 80286 internal copro (with less memory so the board would 
fit) for the Master. Maybe just a cost thing?

cheers

Jules


-- 
If you've ever wondered how you get triangles from a cow
You need buttermilk and cheese, and an equilateral chainsaw