I acquired a HP41CX calculator, bought a new battery and got it to work. It came with 2 memory- and 1 games module but unfortunately I do not have the instruction manuals.
I've played around with some of the options, looked on youtube and tried googling for info but I can't find much. I was wondering if anyone here would know how to access the Games module or where I would be able to find the instructions for it. At least to see if it is working order. Perhaps how to use the memory modules as well, only finding bits and pieces online