Date   : Thu, 25 May 2006 08:36:20 +0100
From   : Sprow <info@...>
Subject: Re: S18 problems?

In article <a53b3c2c4e.kris@...>,
   Kris Adcock <kris@...> wrote:
> The only problem I have 
> left (apart from a keyboard fault, but I'll take that to bits later) 
> is that the Beeb gets confused about how many DFS ROMs are present! It 
> can vary between 0 and about 4 - repeated combinations of ctrl+break, 
> power-cycling and then *HELP can list the DFS 0.9 a random number of 
> times.

Is it possible that the machine used to have a 4xEPROM MOS which someone has
upgraded to a newer MOS but left the links (note: plural!) set for OS 0.10.
Though it's odd that it's intermittant unless the 4->16 line decoder
(74LS163 IC76) is duff.

The hairpin diodes round the sockets aren't touching are they?
Sprow.