HP 12C Identification

[brouhaha]

(07-11-2021 07:36 PM)dylanmitchell Wrote:  How can I identify the processor and firmware used in my 12C's? Looks like HP has used Agilent/Marvell, Atmel, ARM cortex, and others and various firmware versions over the years..

Platinum 25th Anniversary single battery
CNA70707107 (China 07 of 2007)

Platinum dual battery
PHA1050249 (Phillipines 2021? just bought it)

Platinum dual battery
unknown serial

AFAIK, all production versions of 12C Platinum (and Prestige) use the SunPlus (now GeneralPlus) microcontrollers.

There are two versions, most easily distinguished by whether there are parenthesis as the blue shift of the STO and RCL keys.