Re: Re[2]: AVG State Machine PROM Image

At 9:24 AM +0400 10/8/06, peter jones wrote:
>-----Original Message-----
>From: John Robertson <pinball@telus.net>
>To: vectorlist@vectorlist.org
>Date: Sat, 7 Oct 2006 22:14:30 -0700
>Subject: Re: VECTOR: AVG State Machine PROM Image
>
>>
>> You DO have a microscope don't you? Split the cover off and count the
>> burnt/vs unburnt links and build a matrix! Could'nt take longer than
>> a day or two to figure out. With ten you would be pretty sure of
>> getting it right even if a couple failed in the attempt (ducking).
>>
>
>LOL
>i was going to recomend a bank of dipswitches and 8 led's on some strripboard.

Hmm, I wonder what else one could use to replace the PROM - remember
he can't burn the replacement - perhaps. I can visualize some small
metal toroids that hold a magnetic field, if you were to pass some
current through the middle you might be able to flip the field! Then
you might be able to read it with a weak pulse that is almost enough,
but not quite to flip the field again and you would then have
permanent memory - as long as you kept it away from stray field flux.
Some simply transistor amplifiers and other logic...might well work
to replace the PROM! A home made PROM - truly useful...

John :-#)#

-- 
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