HP-41CX CPU broad install to HP-41C

[Harald]

(02-13-2023 07:49 AM)ThomasF Wrote:  The C and CV had a separate board for the CPU and memory, but CX used both components on the keyboard PCB and a totally different board.

That depends. If the CX is a Halfnut, that is true, but if it is a Fullnut, then the boards can be interchanged. There might be a display driver incompatibility in some cases, but I can't remember. Maybe someone with more knowlage on the 41 can enlighten us.
You can tell if the CX is a Fullnut or a Halfnut by looking at the display. The Halfnut has rounded display corners.

Cheers,
Harald