Date   : Sun, 13 Apr 2008 11:01:53 +0100
From   : mike@... (Mike Tomlinson)
Subject: Reviving a dead BBC+

In article <CA3F3CAD6A89405DAAE687FABE1A53B6@...>, Ken Lowe
<ken.lowe@...> writes

>Finally, I snipped the A9 & A10 lines to the memory RAS / CAS contoller IC51 
>but that made no difference (now I need to get a replacement 74LS257AN).

Piggybacking a new chip on top of a suspected faulty one is a useful
troubleshooting technique with dealing with 74LSxx logic.

>As far as I can tell now, the only component left is the 6512 CPU. I need to 
>try and find a replacement from somewhere.

I'm pretty sure I have a spare 6512 somewhere.  I used it in a BBC B so
that I could run the Master BASIC4 ROM.  You're welcome to it if you
cannot find a replacement.

-- 
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