Date   : Tue, 23 Jan 2001 15:13:54 +0000
From   : Mike Tomlinson <mike@...>
Subject: Re: Desecration

In article <XZ502aGsnZb6Ew6N@...>, Mike Tomlinson
<mike@...> writes
>In article <5.0.0.25.2.20010123110444.02d05eb0@...>, Joel
>Rowbottom <joel@...> writes
>
>[model A]
>
>>No. I'm pretty sure it was just the RAM which was missing, and a few other 
>>things (the model A didn't have A/D convertor chipset installed? 
>
>Been trying to remember myself - I think it was missing the upper 16k,
>the A/D chip, and perhaps the user VIA?

Following up to myself, sorry:

Chris has a pic of an Issue 2 board at:

http://8bs.com/see/iss2.jpg

this is missing the 1MHz bus buffer chips (ic71 and ic72) and connector,
and the Tube socket.  The A/D chip and connector are also missing.  In
addition, the date code on the 6502 and system 6522 is 1981, whereas the
date code on the user 6522 is 1983, showing it was added later.

I think this is a model A which has been upgraded at some point to a
model B.

Mike

-- 
"Security-wise, NT is a server with a 'Kick me' sign taped to it."
                      - Peter Gutmann