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Testing the HP-35's chips at Mostek
07-28-2016, 05:18 PM
Post: #1
Testing the HP-35's chips at Mostek
I just read this great article by Fred Beckhusen, who worked in the top secret(*) testing facility at Mostek, where they were one of two manufacturers of chips for the HP-35 and successors:
http://www.mitsi.com/the-hp-35-bluebird-tester/

[Image: Figure%2B1.png]

They also tested the bulk of the world's supply of Z80s, apparently:
http://www.mitsi.com/a-bit-of-z80-history/

via
https://plus.google.com/u/0/+FredBeckhus...FCVjmCmbvd
and points nearby.

(*) Not really. But there was a code name, and HP's name was used only on a need-to-know basis.
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07-29-2016, 01:28 AM
Post: #2
RE: Testing the HP-35's chips at Mostek
Thank you so much for this!

It's a really interesting article and totally on topic for our main forum so I moved it there for better exposure.

-katie

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07-29-2016, 06:30 AM
Post: #3
RE: Testing the HP-35's chips at Mostek
Thanks Katie!
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07-29-2016, 03:55 PM
Post: #4
RE: Testing the HP-35's chips at Mostek
Good stuff! Great that this history has been preserved! (Writing from the Henry Ford Museum in Michigan )

(07-28-2016 05:18 PM)EdS2 Wrote:  I just read this great article by Fred Beckhusen, who worked in the top secret(*) testing facility at Mostek, where they were one of two manufacturers of chips for the HP-35 and successors:
http://www.mitsi.com/the-hp-35-bluebird-tester/

[Image: Figure%2B1.png]

They also tested the bulk of the world's supply of Z80s, apparently:
http://www.mitsi.com/a-bit-of-z80-history/

via
https://plus.google.com/u/0/+FredBeckhus...FCVjmCmbvd
and points nearby.

(*) Not really. But there was a code name, and HP's name was used only on a need-to-know basis.
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07-30-2016, 05:57 AM
Post: #5
RE: Testing the HP-35's chips at Mostek
GREAT FIND - GREAT ARTICLE EdS2

Mostek also made other RPN ROMs. example here
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07-30-2016, 05:18 PM
Post: #6
RE: Testing the HP-35's chips at Mostek
Great article! Seems like this guy has been in the business forever.
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