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HP41CX Zengrange

PostPosted: Tue Nov 17, 2015 8:00 am
by benno
Aftrer doing some Google searching I found this great place.

I'm not a calculator collector at all, but I got hold on a HP41CX Zengrange.
I don't know if it is working, I ordered some batteries and will see.

If the 4 slots on the back are empty, can I still use the Calculator ?
Is there more information about this model available ?

HP41CX Front.JPG


Re: HP41CX Zengrange

PostPosted: Tue Nov 17, 2015 5:02 pm
by Garth
Welcome. It's an HP-41cx made by Hewlett-Packard, apparently with some sort of cover over it made by Zengrange to keep contaminants out of the keyboard for use in a dirty environment, and label it for a custom application. The four ports at the end do not need to be filled. When the calc was new, they came with nothing but port covers in them. There were loads (like a couple hundred) of modules available to plug in there, most being ROM modules for more functions (many written in assembly language for better performance and greater access to the machine), but also I/O and extended RAM. There are a couple of engineers who are still writing new modules for these, and modern flash-based modules that hold many ROM-module images in one port.

Re: HP41CX Zengrange

PostPosted: Tue Nov 17, 2015 6:39 pm
by benno
Hi Garth,

Thanks for the welcome and the answers.

Unfortunately it's not a cover that can be taken of, It's the top piece of the calculators 2 piece case.
If so, I could use it, but now it has only some strange functions with not use for me.
Beneath the rubber you can feel the tiny keys.

Here are 2 more pictures that maybe explain it better.
DSC01974_Bildgröße ändern.JPG
DSC01973_Bildgröße ändern.JPG