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HP Portable Plus - ROMBO 128 KB EPROMS?
07-19-2020, 08:34 AM (This post was last modified: 07-19-2020 08:35 AM by Martin Hepperle.)
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HP Portable Plus - ROMBO 128 KB EPROMS?
While playing with my Portable Plus and reading many issues of the Portable Paper I became interested in burning EPROMS larger then 64 KByte.

In those days, Hal Goldstein offered the ROMBO EPROM burner and special 128 KB EPROM modules, consisting of a thin PCB with DIP-28 pins and a 32-pin EPROM with 128 KB.
Somewhat similar to what was available for HP-41 and 71 calculators.

Does one of you of you have such an EPROM module and could take some pictures?
I would especially be interested in the pinout/connections of this 28 to 32 adapter.
Maybe it is possible to create a clone of it.

Thank you for looking,
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HP Portable Plus - ROMBO 128 KB EPROMS? - Martin Hepperle - 07-19-2020 08:34 AM

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