Date   : Wed, 23 Jul 2003 19:54:37 +0100
From   : Charles Blackburn <charlesb@...>
Subject: Re: Old BBC B

On Wed, 23 Jul 2003 17:20:38 +0100 (BST)
Jules Richardson <julesrichardsonuk@...> wrote:

<CUT OUT THE BITS I KNOW BUGGER ALL ABOUT>

> One of the ROMs is in a dual-height package with a sticker saying
> "RAM" on the top. A red wire also comes out of this module and is
> soldered to pin 11 of IC76, and there's also a black trailing wire
> going to an IC pin clip (which currently isn't connected to anything).
> Any ideas what this is? System clock module, or something more
> interesting?
That will probably be a sideways ram extension. what you generally do is 
to use the "red wire" to goto either the chip select or the clock lines,
then you just plug it into a normal eprom socket. i've seen a couple of boards
like this and even a tutorial on it on 8bs.com

> I need to clean out the mice and test the PSU before I try actually
> powering it up and see if it still works. Keyboard and case have both
> seen much better days but there was a dead machine on the same site or
> a similar age which I might grab tomorrow for parts.