Date   : Tue, 06 Dec 2005 20:19:59 +0000 (GMT)
From   : Greg Cook <debounce@...>
Subject: Re: BBC using 3.5 high density format

On Fri, 4 Nov 2005 21:37:37 +0000 (GMT), Greg Cook
<debounce@...> wrote:

> I still believe that high density disc access is possible
> on
> the BBC Micro and a turbo Electron as well.

I've modified the Opus 2791 board to run at 1 or 2 MHz selectable, and
read the contents of an HD DOS disc on a Model B using the NMI routine
posted earlier.  The data comes out inverted, but using a different
controller would fix this.  Hope this inspires anyone considering
putting an HD disc interface together :)

Pictures of the mod, a few cuts and wires:
http://homepages.tesco.net/~rainstorm/edunfp.jpg (120 KB)
http://homepages.tesco.net/~rainstorm/edunbp.jpg (105 KB)

Greg Cook
debounce@...
http://homepages.tesco.net/~rainstorm/



               
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