[Techtoolslist] Cross to read a PROM?

[Bill Karkula]

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 at irongiant.org.uk]
Sent: Sunday, February 19, 2006 8:22 AM
To: wkarkula at 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 at flippers.com

>[mailto:techtoolslist-bounces at 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 at flippers.com

>[mailto:techtoolslist-bounces at flippers.com]On Behalf Of joemagiera

>Sent: Saturday, February 18, 2006 10:34 PM

>To: techtoolslist at 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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