WIP: 16C firmware hack for more memory

[Garry Lancaster]

I'm finding all this fascinating!

My most-used calculator is my DM16L, and 203 steps is nowhere near enough for all the programs I'd like to have loaded at once, so the idea of being able to get this expanded to 999 or more at some point is very appealing.

If you're looking for ideas for further functionality to add , one thing I long wished for was the availability of basic trig and exponential functions (some of the programs I normally have loaded are for this purpose, adapted from Valentin Albillo and Luiz C Viera's versions).

If the existing code from other Voyager models could be successfully adapted, it would seem like these could potentially be added as alternative f-Shifted functions on the top row and/or right column of the keyboard when in float mode, as all of the current functions in those positions are only active in integer modes.