Date   : Wed, 28 May 2003 21:39:56 +0100
From   : "Nick B." <nickbeee@...>
Subject: Re: Sideways RAM designs

John Kortink wrote:

>On Tue, 27 May 2003 17:24:42 +0100, Nick B wrote:
>
>  
>
>>Can anybody point me towards a simple SWR design for a BBC B using 8k or 
>>16k static ram chips? I guess these were unheard on when the beeb was 
>>originally conceived as everything from that era seems to use DRAM.
>>I'd like to fit one to a model B (issue 7) without having to perform too 
>>much surgery.
>>    
>>
>
>No 8 or 16K, but I did jot down a recipe for 32K chips
>some years ago. It's (temporarily) available from :
>
>http://web.inter.nl.net/users/J.Kortink/rewire.txt
>
>It does involve a bit of work on the underside of the
>beeb's PCB.
>
>
>John Kortink
>
>  
>
Thanks John, that looks most interesting. I realised that is quite 
straightforward to fit SRAM chips to EPROM sockets, it was just deciding 
where to get a R/W signal from and how to do the loading & bankswitching 
stuff.

Nick.