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HP-41CY re-initialization ROM
11-04-2019, 09:35 PM
Post: #16
RE: HP-41CY re-initialization ROM
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.

"Do not suppose, check it twice."
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Messages In This Thread
RE: HP-41CY re-initialization ROM - PeterP - 11-03-2019, 06:19 PM
RE: HP-41CY re-initialization ROM - PeterP - 11-04-2019, 03:48 PM
RE: HP-41CY re-initialization ROM - PeterP - 11-06-2019, 03:36 PM
RE: HP-41CY re-initialization ROM - CY-CL - 10-27-2019, 04:16 PM
RE: HP-41CY re-initialization ROM - hth - 11-03-2019, 05:59 PM
RE: HP-41CY re-initialization ROM - hth - 11-03-2019, 08:32 PM
RE: HP-41CY re-initialization ROM - Diego Diaz - 11-04-2019 09:35 PM
RE: HP-41CY re-initialization ROM - PeterP - 11-06-2019, 03:39 PM
RE: HP-41CY re-initialization ROM - hth - 11-06-2019, 07:45 PM
RE: HP-41CY re-initialization ROM - PeterP - 11-06-2019, 07:45 PM
RE: HP-41CY re-initialization ROM - PeterP - 11-09-2019, 08:21 PM
RE: HP-41CY re-initialization ROM - PeterP - 11-09-2019, 08:19 PM
RE: HP-41CY re-initialization ROM - CY-CL - 12-27-2019, 07:32 PM



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