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NP-41

A HP calculator emulator (19/25/29/33/34/41/65/67/97...) was developed by Eric Smith between 1995 and 2011.

Then from 2018 articles on hackaday and videos on youtube present two calculators produced by Chris Chung: a NP-41 and a NP-25.

But since then... no news... neither from the emulator nor from the calculators !

I use the emulator but I couldn't find where to get the calculators.


NONPAREIL simulator (Eric Smith)

   Nonpareil Simulator...

   Nonpareil for Windows...

   Nonpareil Photos...


Clone NP-41 et NP-25 (Chris Chung)

   NP-41 RPN Calculator...

   NP-41 Calculator Build...

   NP-25C Calculator...


and also some videos on :

  • Concerning the NP-41...

       NP-41 proof...

       NP-41 Unit #1...

       NP-41 Slim Prototype...

       NP-41 ESD Testing...


  • but also the NP-25...

       NP-25 Microcode...

       NP-25 Features...




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    MultiCalc


    A HP calculator emulator (many models...) and a clone project...

    But once again apparently without follow-up...

       MultiCalc Emulator...








    41 CL


    Can the 41CL really be considered a clone?
    Or is it not more of a "hardware" upgrade?
    This calculator is made from a HP-41C/CV in which the motherboard has been replaced...
    The 41CL obtained benefits from larger memory and "turbo" speed thanks to more modern and therefore more efficient components.
    The result compares to a super 41CX which could have been called 41XXL...

       SY 41CL Calculator...






    For the other clones, it seems that other attempts have existed, old discussions in certain forums seem to bear witness to this but nothing seems to have lasted...

    I hope that the inventiveness and creativity of fans will allow us to see the birth of programmable calculators other than through emulators on smartphones.

    I will then be happy to update this site!











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