42S with nonvolatile RAM

[Lyuka]

Long time no see.

I just made modifications of an HP 42S to make its memory nonvolatile by using an F-RAM. It seems successful so far.

Double speed HP 42S with nonvolatile RAM

Lyuka

[Massimo Gnerucci (Italy)]

Congrats!
You are a 42S master modder. ;-)

[aurelio]

No words.....................thank-you for sharing your great work!

[Geir Isene]

I am envious. Not of the calc, but of your knowledge and abilities. Thanks for the inspiration.

[NACHO]

Dear Lyuka,

you cannot imagine how many times I have visited your web,

your mods are so well documented.

I am curious, how many 42s's do you have???

regards

[Lyuka]

Thank you for your compliments.

Actually I have two defective 42S (and two other flawless one, of course ;-)

I really think 42S useful, and for they were defective, I had no hesitation to modify them.

Lyuka