Date   : Mon, 15 May 2006 23:50:01 +0100
From   : Jules Richardson <julesrichardsonuk@...>
Subject: Re: System tomography board at Wakefield show...

Joel Rowbottom wrote:
> At 22:28 15/05/2006, Jules Richardson wrote:
> 
>> ... did anyone on this list grab that board? A couple of our attendees 
>> from Bletchley have mentioned it - I wouldn't find seeing a picture 
>> and finding out some more details of it if it did get bought by 
>> someone here!
> 
> Not me - I'm kicking myself for not getting a photo of it. I was gone 
> for about 10 minutes thinking Adrian was going to grab it, but then went 
> back to the stall and it had been purchased.
> 
> "Bugger."
> 
>  From memory, it had a user port style connector at one end and a 
> Eurocard connector at the other, with some logic in the middle and a 
> 6502. The lettering on the board was in the really old Acorn font. The 
> circuit diagrams said rev.1 was 1979, and this was rev.3 - a 1981 revision.

Are you sure it wasn't just a standard System CPU board, but with a different 
ROM? They have a user-style connector on, normally for the keyboard - but with 
a ROM change you could make that port do anything (and indeed I think the 
System CPU board manual makes a point of saying this). The interface chip was 
an INS8154 I think.

Was the fact that it was a tomography board written "properly" on the board 
itself? Or was that just what it was labeled as for selling purposes?

cheers

Jules