Date   : Tue, 24 Jan 2012 07:55:36 -0600
From   : jules.richardson99@... (Jules Richardson)
Subject: Help figuring out ICs and ROMs for BBC (B or Master)

       <7F98332DDF2C4DC6A075F304CB81212F@...>
Message-ID: <4F1EB858.3000602@...>

Jim Hearne wrote:
> To me the bolts look like they are holding together 3 small microswitchs.
> So, are the switches used on the EPROM higher address lines to select one of 
> maybe 8 different rom images ?

I think so - if that's a 2764 then it's consistent with the blue wire being 
GND, the red wire VCC, the green wire A10, the white wire A11, and I assume 
that the brown wire is connected to A12 (pin 2).

cheers

Jules