Date   : Wed, 09 Jul 2003 06:38:23 +0100
From   : Mike Tomlinson <mike@...>
Subject: Re: Unusual DFS

In article <3F0B1B45.8050800@...>, Nick B <nickbeee@...>
writes

>I've been given (another!) BBC-B but this one has an unsual disk 
>interface. There is a plug-in PCB similar to the Acorn and other DFS  
>PCB's, labelled "United Disk Memories Ltd" but the FDC controller is a 
>40-pin WD2793A-PL02, rather than a 1770 or 8271.

I remember the adverts for that one.  It was one of the earlier Acorn
DFS alternatives.  UDM made up and sold disc drives too.  They may have
been based somewhere in northern England IIRC.

>Has anyone encountered one of these and if so what incompatabilities 
>might I expect?

I'd be very surprised if it ran a protected copy of, say, Elite or Revs.