Date   : Wed, 22 Jun 2005 13:58:23 +0100
From   : jgh@... (Jonathan Graham Harston)
Subject: Re: Watford Electronics DFS

Mike Tomlinson <mike@...> wrote:
> In article <4d7ea8dffbBBCmail@...>, Ian K <BBCmail@...>
> >From memory you should just need to swop the rom unless it is an earley
> >version of the Watford DFS.
> 
> Er, no.  Watford DFS is 8271 based; it's a straight swap for the Acorn
> DFS 0.90 or DNFS 1.20 rom.
 
No, there is Watford DFS for the 8271 and Watford DFS for the
1770. I was once instructed that WDFS 1.4x was 8271 and WDFS 1.5x
was 1770, but another poster said that was incorrect.
 
However, I have several BBCs with 1770 Watford DFS.
 
Looking through the Watford DFS ROM images I have, I can confirm:
 
1.10  - 8271
1.30  - 8271
1.43  - 8271
1.44  - 8271
1.54T - 1770 - Tube Host
 
>From this my original post a couple of months ago of:
 
version 1.4x         - 8271 FDC
version 1.5x         - 1770 FDC
version x.xxT        - Tube Host
 
seems correct.
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
The three food groups: brown, green and ice cream.