Just bought a new old stock HP-12C Gold

[lvt]

(10-30-2023 05:55 PM)Eric Rechlin Wrote:  

(10-30-2023 05:37 PM)Jlouis Wrote:  Eric, it is so possible to flash the 15c firmware into these 12c?

The 15c LE firmware can be flashed on the pre-2015 ARM-based 12c calculators. The 15c CE firmware can be flashed on the post-2015 ARM-based 12c calculators.

Hmm, now I see why my 12C's screen is identical to the 15C's screen, segment by segment.

I was wondering why there are USER and GRAD signs on the screen while there is no related function.