Checking how much memory I have on HP-41CV

[Sylvain Cote]

(08-13-2024 01:27 PM)CheshireChris Wrote:  I know nothing about HP calculators (a situation which I hope will soon change!) and have just bought my first one, an HP-41CV in really good condition. It has an "X FUNCTIONS" and two "X MEMORY" modules plugged in which, as I understand it, should give it its maximum possible memory configuration. I'm going to start reading manuals shortly, but is there any quick command I can use to check that all the memory that should be there actually is there? Ie, that all three modules are correctly being detected?

Thanks,

1. HP 82180A Extended Functions Memory Module Owner's Manual (aka XFM)
2. HP 82181A Extended Memory Module Multilingual Instructions (aka XM)
   

XFM manual (1), p.23, EMDIR

If X-Memory is empty, EMDIR will show "DIR EMPTY" and X contains the number of usable x-memory registers left.

X=124 with XFM only
X=362 with XFM + XM
X=600 with XFM + XM + XM

Look at XM instructions (2), P.15, for how to install XM modules.

Sylvain