Can the HP-12C's program memory be upgraded?

[lvt]

(11-21-2023 08:34 AM)brouhaha Wrote:  

(11-21-2023 08:18 AM)lvt Wrote:  Thanks a lot, I'm glad to know that it's technically possible.

It's technically possible for the recent (2015-present) model, which uses the Atmel ATSAM4LC2CA.

It might be marginally possible for the 2008-2015 model that uses the Atmel AT91S7L128, but I don't think anyone is likely to invest any effort into supporting that model.

How could I know if my 12C has the Atmel ATSAM4LC2CA?

Is there a keys-combination to show the CPU info or I will have to open the calculator to see the CPU's marking?