Hello! As several of you already know, I've been working on a TPDD emulator that runs on an Arduino Mega and uses an SD card for mass storage. I've gotten the emulator to the point where I feel comfortable releasing it for testing purposes.
Here is my GitHub page: https://github.com/TangentDelta/SD2TPDD It's pretty limited at the moment. It doesn't support sub-directories or any of the expanded TPDD features. In the future, I hope to add more features to it! Try it out and let me know how it goes! Thanks, Jimmy.