Nintendo DS Lite The Best Way To Play GameBoy Advance Games

Cylum's Nintendo DS ROM Collection ds gameboy slot DS Insert a 3rd generation game into the GameBoy Advance cartridge slot and a 4th generation game into the DS card slot In the 4th generation game, you ds with gameboy slot My goal is to reverse engineer the protocol, but I have no idea where to even start Specifically: How does the DS game know which GBA game is

ds slot If I wanted to grab more DS cases from Nintendo to say backfill my GBA collection, would they be Eco-crap or not? Has anyone ordered recently ?