Date   : Sun, 15 Mar 2009 22:08:49 +0000
From   : afra@... (Phill Harvey-Smith)
Subject: BBC B+ 64K upgrade

Michael Firth wrote:
> ----- Original Message ----- From: "Phill Harvey-Smith" 
> I haven't found the schematic yet, but the installation instructions are 
> at:
> http://www.nvg.ntnu.no/bbc/doc/BPlus64KFittingInstructions.zip,
> and the additional user instructions are at
> http://www.nvg.ntnu.no/bbc/doc/BPlus128KAdditionalUserInfo.zip

Cheers.

> Given the hassle of installing the Acorn upgrade, and the fact that you 
> need a bespoke PCB that's no longer produced, I've devised an 
> alternative method of doing the upgrade, that's documented here:
> 
> http://www.firths.org/bbc/my_b+128k.html
> 
> It is compatible with the Acorn upgrade, and has the bonus of giving you 
> an extra 2 SWR banks too (effectively giving you a B+ 160K)

Ahh so it's effectivly just 64K of SWRAM Makes sense, I may make myself 
a little carrier board, as I have a box of 128K SRAMs that I could use 
for this.

Cheers,

Phill.

-- 
Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !

"You can twist perceptions, but reality won't budge" -- Rush.