Date   : Sat, 24 Oct 2009 17:15:26 +0100
From   : dl.harper@... (David Harper)
Subject: Master 512 & Gem

Mark Usher wrote:

>I had tried both methods 1 & 2. I rewrote disc 2 again with method 2, then
> tried method 1 again. Still no joy.
> Then I rewrote the 640k boot disc with method 1 and hey presto gem would
> boot from disc 2. Quite bizarre.

I agree. This is bizarre. I can offer no explanation at all.

> At least it is working now. Now all I need is Norton Commander v1.0 -
> actually on the DABS list as working. I tried v2.0 but that doesn't work.
> Probably because of the screen res. Oh and the Econet compatible version 
> of
> DOSPlus.

I have not tried it, so I cannot verify whether it works or not. It is quite 
typical of the 512 that one version of a program will work on it and another 
will not.

> Might just build myself a 1Meg extension board now.

The one outlined in Robin's book is basically what Essential Software sold, 
and that does work (though they tweaked the ROM slightly so that it 
recognised 896kb; without this tweak it will only recognise 768kb - the 
difference is in the "high memory area" so it doesn't affect many programs).

David Harper