Date   : Mon, 28 Nov 2005 04:41:12 +0000
From   : Mike Tomlinson <mike@...>
Subject: Re: ATPL Sideways expansion board problems

In article <4389E442.4090503@...>, A. J. Davis
<mail@...> writes

>"I have a BBC Model B fitted with an Advanced Technology Products Ltd 
>(ATPL) Rom/Ram Sidewise expansion board. It works fine, except that the 
>four Rom sockets on the motherboard are inactive. In all the other Model 
>Bs fitted with ATPL boards that I have seen, these sockets are active. 
>Is there some way of inactivating the four sockets on the motherboard - 
>by changing a link for example?"

My first thought is that the two wire links from the ATPL board to S21
on the motherboard  are incorrectly connected (the wrong way around) or
have come adrift.

There's fitting instructions for the ATPL board here:

http://www.astro.livjm.ac.uk/~bbcdocs/hardware/ATPLSidewise.zip