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AnnoyedOne · (This post was last modified: 08-12-2024 02:13 PM by AnnoyedOne.)

Although I have no real use for it I purchased a (2022 version) HP-12C+ "new" (open package) cheap (about 1/3 of new) online.

You can read more about this version here.

https://web.archive.org/web/202303262239..._new_HP12c

Like the HP-15C CE it is based on the Atmel/Microchip ATSAM4LC2CA SoC and not the Atmel AT91SAML128 the 2008 HP-12C+ (and HP-15C LE) uses. The HP HP-12C+ SDK thus won't work with it. It also uses a different programming cable (the same USB one as the HP-15C CE vs the older serial one).

No MPN as far as I can see but the package has "HP-12c #INT" on it. The barcode (UPC?) is 0 88698 00012 0.

L/NO. 9CJ251 (no serial number) (2022, week 51?)

Mine contains the following firmware (it uses the same viewing mechanism as the HP-15C CE -- that is g-ENTER-ON then 2 from off)

CHE--d1d1h
2015-01-30
C 2008 hP

I have dumped that to a file using SAM-BA v2.18 in a WinXP SP3 virtual machine (VM). [I used Win7 SP1 for my HP-15C CE.]

If Moravia updates the firmware (hint hint!), as they have for the HP-15C CE, I may be able to save/restore its memory using VoyagerSave.

A1

PS: Warning - Many online stores are still selling the single CR2032 cell HP-12C. I'm not certain what CPU those use (I know what is claimed on Wikipedia). The HP-12C Platinum also uses a single CR2023 battery. The (6502 based) firmware in those is not updatable. If you care what you're buying check carefully before parting with your money.

PPS: A far as I know the latest HP-12C manual (PDF) is edition 5 from April 2008 (most sites, including HP's, have edition 4 from 2005). It does not admit to updatable firmware etc but does show two CR2032 batteries and the 6-pin programming (POGO) connector in appendix E. However I did find "HP-12C Calculator - Performing the Self Test.pdf"

at

https://hpofficesupply.com/wp-content/up...f-Test.pdf

and it documents the (1.L 2.C 3.H) menu that is available at power-on in the HP-12C+ and HP-12C Platinum (plus the HP-15C LE/CE).

PPPS: Interestingly the dumped firmware image contains

Code:

0123456789ABCDEF

2 0 0 9 - 0 6 - 0 1 

  C   2 0 0 8   h p 

1.L 2.C 3.H