HP-42S battery drain

[Marcovecchio]

If we had the ROM in a separate chip, that would be viable, but no, the ROM code is inside the main processor. So if I did that, the 42s would be fully turned into a 17bII.

As an experiment, I though about making a mod: to install an external on/off switch, that would cut power to the processor, but not ram. That way I could turn the calculator off, stop the drain, and keep ram contents. During use, the battery drain would keep happening, but that would be way better than it is now. I don't know if this would work or not, but I may try it someday!

Eduardo