Special Module for HP-41CX



#3

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


#4

Hello Fabio,

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:

http://www.hp-collection.org/modules.html

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.

Best Regards


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