DM41L.

[grsbanks]

Gérard,

Your best bet is to use the manuals for the HP-41CX. They are linked to on the Swiss Micros website:

https://www.swissmicros.com/models.php

The DM41L actually runs the HP-41CX's ROM (with a few patches to handle the different keyboard layout) and the LPC1115 chip in the 41L has enough spare RAM to include one Extended Memory Module, so running EMROOM will give you 362 registers available instead of the 124 you'd get with a 41CX.