Date   : Wed, 08 Dec 2004 22:10:17 +0000
From   : jgh@... (Jonathan Graham Harston)
Subject: Re: Eprom programming problem

"John & Helen Simpson" <john@...> wrote:
> 1) When I plug the Eprom (in a cartridge) into the Master and try to
> *SRSAVE the relevant bank, the command fails, presumably because the
> machine cannot detect any ROM at that position, not even a garbled one.
 
A little-known fact: *SRSAVE on the Master will only save from a
RAM bank. It refuses to save from ROM. Use a different version
of SRSAVE, such as the one on my Utilities disk at
http://www.mdfsnet.f9.co.uk/Mirror/Image/JGH/003.ssd
 
> 2) If I try to use the Eprom programmer software to save the contents of
> the Eprom, it reports an Eprom programmer error at a location above
> &A000. Yet the Eprom was (when new) verified OK and written to
> successfully.
 
That sounds as though there's a fault with the A13 line. &8000-&9FFF is
%010xxxxxxxxxxxxx, &A000-&BFFF is %011xxxxxxxxxxxxx.
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
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