HP-12C+ (2022 version)

[AnnoyedOne]

(10-31-2024 06:32 PM)pat_art Wrote:  How do I know which HP12C model can be flashed with the HP15CE firmware?

As ctrclckws already said

• Two CR2023 coin cells (originals have three LR44's and later ones a single CR2032).
• Manufactured after 2015. The serial number indicates this. The firmware date too---maybe.
• A 6-pin "POGO" connector in the battery compartment.
  

The latest hardware also has no Hewlett-Packard on the front bezel, is "Made in Philippines", has a screw on the battery cover and the package says distributed by Moravia.

See the photos in the link in the first post.

A1

PS: Just to add to the confusion (the HP-12C has been sold for 43+ years and there are many hardware variants) there's the Rogue HP-12C sold only in Brazil to my knowledge. It looks very similar but is "Made In China" and has a different serial number format. Seemingly Platinum-like hardware and although it does have a 6-pin programming connector in the battery compartment it likely requires a proprietary programmer (not serial or USB).

https://www.hpmuseum.org/forum/thread-22313.html

So far I have haven't seen any of these in the wild or on eBay but it is possible that they exist. I was not aware of these when I bought my 12C+.