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Thanks for the memory

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Project by oldnovice posted 07-19-2012 09:35 PM 1702 views 2 times favorited 18 comments Add to Favorites Watch

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!"





18 comments so far

View dustprocrastinator's profile

dustprocrastinator

71 posts in 1533 days


#1 posted 07-19-2012 09:43 PM

Nice memories, and i can only imagine how your work paved the way for nowaday flas drives

View Dan'um Style's profile

Dan'um Style

13680 posts in 2830 days


#2 posted 07-19-2012 11:31 PM

cool posting BUD

-- keeping myself entertained ... Humor and fun lubricate the brain

View SirFatty's profile

SirFatty

476 posts in 1059 days


#3 posted 07-20-2012 01:42 AM

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.

-- Visit my blog at dave.spalla.com

View S4S's profile

S4S

2119 posts in 1528 days


#4 posted 07-20-2012 06:17 AM

Very impressive , cool .

View KnotCurser's profile

KnotCurser

1892 posts in 1915 days


#5 posted 07-20-2012 12:30 PM

Bravo

A very cool tribute – you should be proud.

-bob

-- Robert Rhoades WoodWorks / Email: rrww@rhoadesclan.com / www.rhoadesclan.com

View RKaste's profile

RKaste

144 posts in 1003 days


#6 posted 07-20-2012 01:07 PM

Really Nice! very interesting. Thanks for sharing.

-- --May you have fair winds and following seas--

View jeepturner's profile

jeepturner

931 posts in 1639 days


#7 posted 07-20-2012 03:02 PM

Very cool piece and a great recent history lesson. Sometimes I forget how much the world has changed in my life time.

-- Mel,

View helluvawreck's profile

helluvawreck

16667 posts in 1713 days


#8 posted 07-20-2012 03:36 PM

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

View bunkie's profile

bunkie

412 posts in 1994 days


#9 posted 07-20-2012 05:23 PM

How creative!

I dealt with my fair share of EEPROMs (2708, 2716, 2732) filled with 8031 and 8051 code.

-- Altruism is, ultimately, self-serving

View clieb91's profile

clieb91

3380 posts in 2782 days


#10 posted 07-20-2012 08:44 PM

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."- PortablePastimes.com (Purveyors of Portable Fun and Fidgets)

View Doe's profile

Doe

1146 posts in 1677 days


#11 posted 07-20-2012 08:44 PM

I remember EPROMs (sigh). It’s a really wonderful gift.

-- Mother Nature talks, I try to listen

View NormG's profile

NormG

4820 posts in 1851 days


#12 posted 07-22-2012 12:19 AM

That is very cool, thanks for sharing

-- Norman

View waho6o9's profile

waho6o9

5761 posts in 1424 days


#13 posted 07-22-2012 12:33 AM

Makes for a great gift Oldnovice, very good work.

View Russ's profile

Russ

356 posts in 1924 days


#14 posted 07-22-2012 04:31 AM

I love this as a geek growing up in the 80s I really liked this.

-- Russ

View oldnovice's profile

oldnovice

3917 posts in 2215 days


#15 posted 07-22-2012 05:42 AM

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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