HP-41CY re-initialization ROM

[Diego Diaz]

Hi Jurgen, all,

I would say that your "monologue" feeling comes mostly from the fact that there are very, very few CYs out there; and not because your M-coding efforts are not appreciated. They are! :-)

I don't have a CY myself, however, a well known contributor here sent me his CY for repair... IICR one memory chip and a logic IC were damaged (as weird as it may sound.)

Once the HW was fixed, reinstalling the W&W OS was not trivial. I made a heavily modified Clonix-D, running HEPAX at and odd page (preventing auto allocation) and use the CRF (Crash Recovery Function) stolen from the NoV-64 code, to prevent polling crashes.

A lot of fun (for a real geek :-) but certainly doing all that with a simple Clonix and M-code at page #4 is a serious programming achievement.

Congrats from Spain.

Diego.