RE: Cross to read a PROM?

You could be right about the security fuse on the 'S153 - I was going from
memory. These parts go back over 20 years ago. I used to work for MMI who
created the PAL which was a competitive device to the FPLA. We had the
security link on the PALs for sure.

Bill

-----Original Message-----
From: Phil Morris [mailto:arcaderelics@irongiant.org.uk]
Sent: Sunday, February 19, 2006 8:22 AM
To: wkarkula@comcast.net; Technical Tools Mail List
Subject: RE: [Techtoolslist] Cross to read a PROM?

>It's not a prom but an FPLA from Signetics. If the securtity link that
>protects the reading of the fuse array is blown (which is usually the case
>in commercial products, you will be unable to read or duplicate it as the
>addressing of the fuse array will be scrambled for protection.

Interesting ............... my own research (a few days ago) revealed that
it's a PLD and doesn't have a security fuse so *can* be read. :)

Phil

>-----Original Message-----
>From: techtoolslist-bounces@flippers.com
>[mailto:techtoolslist-bounces@flippers.com]On Behalf Of joemagiera
>Sent: Sunday, February 19, 2006 7:35 AM
>To: Technical Tools Mail List
>Subject: RE: [Techtoolslist] Cross to read a PROM?
>
>
>Thanks for the couple of suggestions. I should have been more clear on my
>original question. I'm just trying to read the PROM (it is a PROM isn't
>it?) to verify against the MAME set that it's not corrupted. I'm using an
>EETools Top Max which is a pretty good device (although it can't do the
>2708's). In the past, Al Kossow's original PROM cross reference (now
hosted
>on a few sites, but I usually pull it from mikesarcade.com) has always been
>able to stear me to a substitue PROM to be able to read it, but this one
>isn't listed.
>
>Joe
>
>-----Original Message-----
>From: techtoolslist-bounces@flippers.com
>[mailto:techtoolslist-bounces@flippers.com]On Behalf Of joemagiera
>Sent: Saturday, February 18, 2006 10:34 PM
>To: techtoolslist@flippers.com
>Subject: [Techtoolslist] Cross to read a PROM?
>
>I checked the usual PROM cross reference sites with no luck. Can anyone
>suggest a suitable cross refernces to read a Signetics N82S153N PROM?
>Thanks,
>
>Joe
>
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Received on Sun Feb 19 11:20:20 2006