Date   : Sat, 18 Jul 2009 22:47:44 +0100
From   : jumbos.bazzar@... (Mark Haysman)
Subject: Master ethernet upgrade

> Please note: for electrical reasons this upgrade can only be fitted to a
> Master or Master Compact,
> Sprow.

I knew I'd seen this somewhere, turns out to be on Ian W's site!!

http://www.beebmaster.co.uk/Econet/BBCBSpEc.html

Could you use that adaptor to use these in a B? Taking into account a 
rewrite of the code, or fitting a C type processor?

Mark.