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+--- Thread: HP-85 ROM internals picture? (/thread-7844.html)
HP-85 ROM internals picture? - 1980s_john - 02-28-2017 09:51 PM
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
RE: HP-85 ROM internals picture? - Paul Berger (Canada) - 02-28-2017 10:49 PM
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.
RE: HP-85 ROM internals picture? - Martin Hepperle - 03-01-2017 10:06 PM
... look here https://groups.io/g/hpseries80/album?id=642
Martin
RE: HP-85 ROM internals picture? - 1980s_john - 03-01-2017 10:22 PM
Thanks Martin!
Regards,
John
RE: HP-85 ROM internals picture? - Garth Wilson - 03-02-2017 05:04 AM
The link requires an account and login.
RE: HP-85 ROM internals picture? - Martin Hepperle - 03-02-2017 09:21 PM
(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