I've gotten stellads working on an m3sd adapter, using libfatdragon from: http://www.dragonminded.com/?loc=ndsdev/LibFATDragon

I've also found and fixed a bug with <18 roms in the rom directory. stellads would print out garbage (it was indexing into an stl vector with a negative index). The diff is at:
http://www.synack.net/~bbraun/stellads/stellads.diff

The complete modified sources are at:
http://www.synack.net/~bbraun/stellads/stellads.zip

To build this, I installed libfatdragon in $(DEVKITPRO)/libfat/{include/lib} and that is where the Makefile points to. If you have it installed somewhere else, feel free to modify the Makefile. I used the 'green' libfatdragon, which is for the m3cf, m3sd, and m3minisd adapters. There are other versions of the libfatdragon for other media.

And a precompiled m3sd image is at:
http://www.synack.net/~bbraun/stellads/stella-m3sd.nds

Make sure you have a stellads directory at the top level of your sd card, which contains roms.
As always, the usual disclaimer applies. No warranty expressed or emplied, etc etc. This is developmental, if it destroys your sd card, m3 adapter, nds, or burns down your house, you have been warned.

Rob

Thanks for the news!

I'm lost... what's this "libfatdragon" thing for and how do I use it?

From the LibFATDragon web page linked above:
"LibFATDragon is my modified version of chishm's older fatlib."

It is a library, built on chishm's library, that accesses the FAT filesystem on the SD/CF card. You don't need to worry about it unless you are building something that uses it, such as the modified stellads sources above.

Rob

Ahh. Thanks for clearing that up for me.