Add newRPL as possible firmware base

[c3d]

You list some "software" as opposed to firmware.

newRPL is missing from the list. And it is also a complete firmware for the HP50g.

BTW, any suggestion regarding the base OS? I think HP calculators have used FreeRTOS for a while.

[xavierbasc]

It won’t really have an operating system as such, but rather an interface with the hardware, with the main hardware management functions shared in a core—something similar to the DMCP from SwissMicros. I recommend checking out the following article I wrote on the project’s website, which outlines the main ideas: https://50calc.com/heart-dm50/.