You should also throw a file recovery program at the devkit to see what else might be hiding. People have found some solid stuff that way. If you need assistance with it I can give you a hand, it's really rather easy with the right tools.
Obscure Gamers is a Video Game Preservation group founded in 2017. We actively work to preserve long lost video game history & hardware for educational research and historical purposes. Our long term goal is to work with Video Game Developers in preserving this important history from being lost.