I recently purchased a DM41L from Swiss Micros, because the HP15 and the HP41C were my favorite computing devices when I was in college.
So far I've been having a ball not only using the calculator but writing software to read/write the calculator's memory.
The python app I've written is tested on MacOS and Ubuntu and should work on Windows, and it lets you import and export programs and extended memory, manage keyboard assignments (including synthetic), and alarm support is coming.
Check it out on github! https://github.com/mwheinz/DM41L_Explorer


