Several things - test-drb@ccmp.vtda.org

4 Apr 1999

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 C= PET VisiCalc EPROM
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The Commodore PET version of the VisiCalc spreadsheet came with a chip that
plugged into a socket on the main board. This was probably an EPROM, used for
copy-protection. I have an original VisiCalc package, minus this EPROM. Does
anyone know where I can download an image of the EPROM from? 
I'd be interested to know exactly what this chip did.  It was never
perfectly clear to me that it was used for copy-protection.

...
 Nutspinner
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Disassembling PCB-mounting D-type connectors is a pain without having a
nutspinner for the hexagonal bolt things which typically fix the connector to
a panel. What size, number or whatever nutspinner is the right one for this
purpose? 
3/16 inch.

-- 
 Tim Shoppa                        Email: shoppa(a)trailing-edge.com
 Trailing Edge Technology          WWW:   http://www.trailing-edge.com/
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