HP42S with non-volatile ram

[mfleming]

(06-11-2020 04:40 AM)GreyUser Wrote:  Ultimately, I found some traps/issues with the method Takayuki Hosoda illustrates on his website. So, if anyone is interested in doing this mod, I’ll write up my process and post some photos. I honestly don’t want to bother if this is old ground or there is no interest. This post was enough effort for the moment!

Congratulations on the successful upgrade! Having lost some programs because of dead batteries, I'd love to have a similar mod. Alas, no spare 42S to experiment on.

Any writeup, even without photos, that can supplement Takayuki's excellent instructions and help others accomplish the same modification would be appreciated by many. Anything that can add to the sum of community knowledge!

~Mark