HP41 system ROM related - versions and compatibility Message #1 Posted by Vieira, Luiz C. (Brazil) on 30 Nov 2009, 9:53 a.m.
Hi, all HP41 addicted!
After causing many (very good) reactions after bringing the ROM-images subject up, I would like to know about the many HP41 system ROM versions and their compatibilities. Most of the discussion lies on the coconut, because the halfnut series do not allow 'mixing' the system ROMīs as they are not accessible separately. I confess I did not research the Forum archives, but I actually do not remember reading about this specific subject.
The system ROM versions I'm aware of (thanks to W. Furlow) are:
ROM 0 1 2
D D E
F E F
G F L
H
N
Each system ROM is stored in one single chip (coconut series), so they could possibly be mixed with each other. My questions to those who have already dealt with these ROMīs are:
- what are the valid combinations?
- which of them are specifically for the CX?
- which, if any, can be used with either the C/CV and the CX?
This would depend both in observing actual configurations or in official documentation. I have some 41C/CV I could check for a few samples, and also three CX, but these would be just a few samples. The possible combinations are in vaster number than the actual working combinations, so I decided to ask.
Thanks again!
Luiz (Brazil)
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