Local registers on HP-41?

[hth]

This is a good idea and something I may want to put in a future module, though I have some ideas to do it a bit differently.

There are basically two options I would consider on where to take the memory needed from, the free area or extended memory.

The free area has the advantage of working on all models, but the amount of (free) memory available can be a limiting factor.

Extended memory works on CX and CL models, where the entry points for working with extended memory are fixed. On the C/CV it would require an extended functions module, which can be put into any port and making the code work with extended memory on both variants is not so appealing to me.

Is it worth supporting the HP-41C and HP-41CV models? Do you tend to fill the main memory on your HP-41?

Håkan