Date   : Wed, 06 Aug 2003 13:23:17 +0100 (BST)
From   : Jules Richardson <julesrichardsonuk@...>
Subject: Lathe ROM modules... / Watford VPO ROM

Sorry, I lost the original post about this so can't remember the title!

I've just been going through all of my Acorn stuff to see what I have, as lots
of new stuff's turned up recently.

I found in a Master machine a ROM module very like the one described the other
day for controlling a lathe - the ROM chip itself plugged into a carrier
containing a PAL chip, which in turn plugs into the system board.

The ROM in question in this machine has a Watford label with 'VPO' written on
it in pen. The PAL chip is a 16L8. The ROM carrier has the text 'P102/A'. 

Unlikely that the decoding done by the PAL is the same I suppose, but you never
know. I'm not sure what this Watford ROM is for - does VPO mean anything to
anyone? The machine has an 80186 coprocessor fitted, so maybe it's something to
do with that; there's nothing special about the internals of the machine
otherwise.

cheers

Jules 

====
Backward conditioning: putting saliva in a dog's mouth in an attempt to make
a bell ring.

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