News/Sega Art Tool, Sega Sound Tool, GEMS 2.8 ROM
Tiido has gotten some nice Sega development carts and was kind enough to donate the ROM dumps. Here are the roms, and a photo of the carts.
The tools don't do much as they require matching PC software, but I've briefly looked at their code; someone could code up a quick program fake the other side of the interface. If I weren't so busy...
Thanks to Tiido for providing these!