Date   : Thu, 23 Jun 2005 00:07:46 +0200
From   : "Mark Usher" <mu.list@...>
Subject: Re: Watford Electronics DFS

I seem to remember being unable to get any of the Solidisk DFSs to work with
the Acorn interface, or it may have been the other way round. It might even
have been that I was trying to get Acorn ADFS to work with Solidisk. Oh so
long ago....

Mark

-----Original Message-----
From: Majordomo List Manager [mailto:majordomo@...] On Behalf Of
Mike Tomlinson
Sent: 22 June 2005 23:50
To: bbc-micro@...
Subject: Re: [BBC-Micro] Re: Watford Electronics DFS

In article <4d7f30739cinfo@...>, Sprow <info@...> writes

>Now I'm confused.

That's my line :)

> I'm sure I had a Solidisk DDFS at some point where the "D"
>was for dual.

We're talking about the Watford interface here though :)

>The interface board then had both an 8271 and a 1770, and a toggle 
>switch at the back of the case to select one or the other. This way 
>games which expected an 8271 could see an 8271 and the 1770 could 
>operate the rest of the time.

You're thinking of the Solidisk DFDC (Dual Floppy Disc Controller.) Again,
it came in two variants; the later one mapped the 1770 at the "official"
Acorn memory addresses and was compatible with the Acorn 1770 ROM.  The
early one was incompatible and only worked with its own ROM.

Mike