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HP-85 ROM internals picture?
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HP-85 ROM internals picture?
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HP-85 ROM internals picture?
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02-28-2017, 09:51 PM
Post: #1
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HP-85 ROM internals picture?
Hi,
Has anyone got a picture please of the inside of an HP-85 ROM? I recall they look like a blob of epoxy with wires coming out, but Google can't find an image. Thanks, John |
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02-28-2017, 10:49 PM
Post: #2
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RE: HP-85 ROM internals picture?
There are no visible wires it is just a blob of epoxy on a small printed circuit board with plated through holes along the long edges that provide connection to the ROM drawer. Under the epoxy blob the die is likely wire-bonded directly to the circuit board.
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03-01-2017, 10:06 PM
Post: #3
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RE: HP-85 ROM internals picture?
... look here https://groups.io/g/hpseries80/album?id=642
Martin |
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03-01-2017, 10:22 PM
Post: #4
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RE: HP-85 ROM internals picture?
Thanks Martin!
Regards, John |
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03-02-2017, 05:04 AM
Post: #5
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RE: HP-85 ROM internals picture?
The link requires an account and login.
http://WilsonMinesCo.com (Lots of HP-41 links at the bottom of the links page, at http://wilsonminesco.com/links.html#hp41 ) |
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03-02-2017, 09:21 PM
Post: #6
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RE: HP-85 ROM internals picture?
(03-02-2017 05:04 AM)Garth Wilson Wrote: The link requires an account and login. Ah, yes - I have attached one reduced scale version of one of my images. If you are interested in Series-80 computers you should join this group (in addition to this Forum) because it specializes on the Series-80 systems. No big overlap with the more calculator-centric business going on here. Martin |
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