Anyone have any info on this Pics model number support list would like to see it or find one like it thanks tony -----Original Message----- From: techtoolslist-bounces@flippers.com [mailto:techtoolslist-bounces@flippers.com] On Behalf Of John Robertson Sent: Sunday, September 09, 2012 12:54 PM To: techtoolslist@flippers.com Subject: Re: [Techtoolslist] Old test equipment kits...Alpha's IC tester. Rodger Boots wrote:
It's very unlikely that program code was in RAM, get power to RAM straightend out first before panicking.
Sorry Rodger, the code IS in the volatile RAM....as the manual states the code is in the first 4K of the DALLAS device, with the rest of the device set aside for IC parameters. Grrrr. Don't ask me why he did it that way - the device had a sticker on it saying 'Do not remove or warranty is void' too. No sign of the source code anywhere. Tried reading the device, but while there was data on it, hard to say if it was any good...next I guess I could check if the data has a reasonable boot vector (somewhere in the 1st 4K) for Z80 and hope that the thing is not too badly scrambled...it is always possible that the ROM code is good, but that the display logic has failed. John :-#(#
On Sep 7, 2012 5:36 PM, "John Robertson" <jrr@flippers.com <mailto:jrr@flippers.com>> wrote:
John Robertson wrote:
Dave Caroline wrote:
On Fri, Sep 7, 2012 at 9:03 PM, John Robertson <jrr@flippers.com <mailto:jrr@flippers.com>> wrote:
John Robertson wrote:
I just received an interesting piece of late 80's technology. An in-circuit Digital IC tester (kit). Made by Alpha it is a Z80 based tester that clips over the IC in question and lets you know if it is working correctly. I suspect it is not unlike the Bug-Trap (HP) Logic Comparator. You need to key in the logic table for each IC that you wish to test (up to 24 pin), and it stores these in non-volatile RAM.
Seems to work and I shall post the manual, Eprom, and stored RAM (Dallas) eventually to TTL's FTP.
Originally published in Radio-Electronics in November and December 1987 as
One has to ask, was the source in the article :)
Dave Caroline
Ah, no, that would be 'easy' - the code was only in the battery backed up RAM. (background sound of person kicking self around the room)
It also appears that Mr. Green may have died - am checking with another author who mentions a Bill Green from Radio-Electronics and Popular Electronics as the 'late Bill Green'.
John :-#(#
Unfortunately it has now been confirmed that Bill Green has died. I just received the following note in response to asking about Bill:
/Yep.. Bill is no longer with us. I would be the only keeper of the grail... However, I don't have one of those or the code./
So, now to find one of these machines that still works...right...
John :-#(# _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com <mailto:Techtoolslist@flippers.com> http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
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