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HP-41 modification: what is this (see photos)?
06-10-2022, 08:08 AM
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Cococollector Offline
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HP-41 modification: what is this (see photos)?
An HP-41CX fullnut I bought long ago shows a lengthy hole on the underside near one of the rubber feet.
It‘s (the calc‘s, not the foot‘s) speed is quite double of that of my other 41s!
Opening it, I find an extra PCB and additional wiring. CAT 2 doesn’t reveal any hidden ROMs.

What have I found here??? Any clues? A turbo modification?

Klaus


Attached File(s) Thumbnail(s)
       
11C|41CX (half)|41CX (full),ETS turbo|48G, Lorenz Comp 256k|34C| 41CV (full), misc. ROMs, periph.s, IL (in order of appearance)|15C CE
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HP-41 modification: what is this (see photos)? - Cococollector - 06-10-2022 08:08 AM



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