DB48X: HP48-like RPL implementation for DM42

[LinusSch]

I too have no DMCP calc but I do have a spare 50g - originally bought half as a spare, half for tinkering with newRPL, as I really don't dare be without a standard 50g in working order. Yet.

I count three of us, so far. Not a lot, but I'll try to set up for working on this!

Not sure how much time I will find for this project, I certainly won't be able to keep up with the pace db48x has shown so far. But when/if it eventually works it should not be too much effort to keep new releases working, I hope.