Date   : Thu, 29 Sep 2005 19:37:49 +0100
From   : "A. J. Davis" <mail@...>
Subject: Re: Care Electronics ROM Cartridge

I've made a few pictures:

http://www.alchemistresearch.com/bbc/rom/rom1.jpg
http://www.alchemistresearch.com/bbc/rom/rom2.jpg
http://www.alchemistresearch.com/bbc/rom/rom3.jpg

The damaged chips had their notches 'West'. I'm not so bothered about 
the chips because I have a programmer and a good supply of chips.

Andy.

Nick B. wrote:

> Maybe the cartridge is assembled incorrectly? If the PCB is not in the 
> case then there is the possibility it can be plugged in either way!
>
> Just looking at mine that takes 4 EPROMS, fitted with two slide 
> switches on top. When inserted in MAster the ICS face away from the 
> keyboard and the pips on the (2764 or 27128) EPROMS should be facing 
> downwards.
>
> If the EPROMS were seen to be glowing then there is a good chance they 
> have been fried. If the glass window is not covered then they will 
> erase themselves over time as they are sensitive to UV.
>
> Regards,