The Museum of HP Calculators
HP Forum Archive 15
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|Special Module for HP-41CX|
Message #1 Posted by FABIO ALBONICO on 30 Dec 2005, 9:53 a.m.
I want to understand the difference between the special modules made for HP-41 like CCD, ZENROM etc.
Somebody can explain me and tell me how to find these?
Thanks and happy new year
|Re: Special Module for HP-41CX|
Message #2 Posted by Doug Wilder on 30 Dec 2005, 9:59 p.m.,
in response to message #1 by FABIO ALBONICO
Guess we could say that the HP41C "Special Modules" are modules not programmed by HP. There are too many for me to list here however, Matthias Wehrli has a .pdf which lists almost all of them along with some data for each module:
As far as "find these"; eBay or the Classified Ads here (place a "wanted" ad) are the best bets yet some modules are VERY rare (nearly impossible to find).
The modules that you mention (CCD, ZENROM) are micro-coded roms, whereas many special roms are user-coded roms. The other possibility is using an MLDL device to load module "image". Two such devices are currently being produced: the Clonix/NoVRAM and the MLDL2000. Google is your friend.
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