| Project by oldnovice | posted 304 days ago | 1214 views | 2 times favorited | 18 comments | ![]() |
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In the 1970’s I was deeply involved with the microprocessor evolution and all of the hardware required to build stand alone microprocessor based equipment. We started as a small group and over the next few years grew to the point that in the early 1980’s we some people decided move on. When two of our group decided to leave we wanted to give them a going away gift to remember their time with us.
As a going away remembrance I made a scaled up version of one of the first EPROMs (Electrically Programmable Read Only Memory). These memory packages had a quartz window so they could be erased by ultraviolet light. The die inside the package was readily visible.

The image above was one of the original packages that later evolved into lower cost packages with round windows as shown below.

The package above was my reference package for the scaled up model. To replicate the die I used individual photos of the group (blurredfor posting on LJ) and arranged them in a grid with a message above (wiped out) and a message below. The 24 pins on the package were made from brass, bent on a brake, and screwed to the middle base.
A Plexiglas cover was cut, mounted in the opening, and secured with black RTV to simulate the epoxy on the real package.
The bottom of the package was left clear for signatures from the people left behind.
-- "I never met a board I didn't like!"
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18 comments so far
dustprocrastinator
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61 posts in 853 days
#1 posted 304 days ago
Nice memories, and i can only imagine how your work paved the way for nowaday flas drives
Dan'um Style
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10772 posts in 2150 days
#2 posted 304 days ago
cool posting BUD
-- keeping myself entertained
SirFatty
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324 posts in 379 days
#3 posted 304 days ago
Awesome build… I spent many a days programming EPROMS for some Z80 base controller boards at a place I worked at in the 80’s.
moment
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1642 posts in 848 days
#4 posted 304 days ago
Very impressive , cool .
KnotCurser
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1409 posts in 1235 days
#5 posted 303 days ago
Bravo
A very cool tribute – you should be proud.
-bob
-- Man is a tool-using Animal. Nowhere do you find him without tools; without tools he is nothing, with tools he is all. - Thomas Carlyle http://www.ffrf.org
RKaste
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144 posts in 323 days
#6 posted 303 days ago
Really Nice! very interesting. Thanks for sharing.
-- --May you have fair winds and following seas--
jeepturner
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896 posts in 959 days
#7 posted 303 days ago
Very cool piece and a great recent history lesson. Sometimes I forget how much the world has changed in my life time.
-- Mel
helluvawreck
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10363 posts in 1033 days
#8 posted 303 days ago
It’s really nice and I bet they really cherish them.
helluvawreck
https://woodworkingexpo.wordpress.com
-- If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away. Henry David Thoreau
bunkie
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419 posts in 1314 days
#9 posted 303 days ago
How creative!
I dealt with my fair share of EEPROMs (2708, 2716, 2732) filled with 8031 and 8051 code.
-- Altruism is, ultimately, self-serving
clieb91
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2674 posts in 2102 days
#10 posted 303 days ago
A very cool memento for someone to take with them. Radio Shack used to actually sell these when I worked there in the 80’s
CtL
-- Chris L. "Don't Dream it, Be it."
Doe
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261 posts in 997 days
#11 posted 303 days ago
I remember EPROMs (sigh). It’s a really wonderful gift.
-- Mother Nature talks, I try to listen
NormG
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2570 posts in 1171 days
#12 posted 302 days ago
That is very cool, thanks for sharing
-- Norman
waho6o9
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#13 posted 302 days ago
Makes for a great gift Oldnovice, very good work.
Russ
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#14 posted 302 days ago
I love this as a geek growing up in the 80s I really liked this.
-- Russ
oldnovice
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1735 posts in 1534 days
#15 posted 302 days ago
Thanks to the geeks and non geeks,
The company I worked for was on the leading edge, and sometimes the bleeding edge, of the microprocessor revolution. I wrote a P.O. for three 8080’s, that were only available in CERDIP package, for $395.00 each. At that time it was the most expensive single item my company had ever purchased.
From that we built our own proprietary microprocessor system with RAM boards, EPROM boards, a number of digital I/O, analog I/O, and special function boards all into a custom card rack. We did this because there was nothing available on the market that met our requirements for building self standing equipment.
For development system we had an Intel 8080 MDS unit, serial number #8!
I really enjoyed those days!
-- "I never met a board I didn't like!"
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