What's CPU of HP 12C and HP 12C Platinum


Hi every body,
Do you know what is CPU of HP 12C and HP 12C Platinum. What are differences between them (specially on technology and speed)?

Thank you.


Hello, Luc;

I read here that former Voyagers CPU was based on the HP41 CPU, known as nut. This is the explanation for Coconut as HP41 project name, and the later references as fullnut (earlier models) and halfnuts (later ones).

There are at least four major HP12C's "nuts", being three of them from previous 3-cell (4.5Vcc) units provided by HP and the later one, from Agilent, exclusively for the one-cell (3.3Vcc) newer version. I have their ID codes, if you wnat a list of them.

The HP12C Platinum has a bubble-type CPU without any identification at all. I call it a peanut, but someone here told me a peanut is not a nut, even being called peanut, and this is enough for me to rename it. So now I call nonut the HP12C Platinum processor! d;)

Sorry, but I could not resist...

Hope this helps... except for the peanut/nonut "joke".

Luiz C. Vieira - Brazil


Thank you,Vieira, Luiz C.
please let me know the list of ID codes of HP 12C.


Hey, Luc;

These are the ID codes for HP12C calculators I had in hands for maintenance. They are in "order of appearance" and I do not know when they were introduced or discontinued. FIrst one is the earliest.

1LH1-0304 + ILF5-0301 (HP original, R2D2 and KBD scanner)
1LQ9-0322 (HP original)
1RR2-0001 (HP original)
2AF1-0001 (Agilent, 3Vcc cell type)

These are the ones I know. PLease, if anyone else has information about others, let me know.

Best regards, Luc.

Luiz C. Vieira - Brazil

Edited: 11 June 2003, 2:04 a.m.

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