Is there some kind of? Aka does it exist at all? Or is the one found in the public doc (y0sh1's doc on top of all) everything that has to be known?
in short, everything that the lower connector offers, the top does too, plus many many more magical features (on top, but not on the bottom) the bottom slot is somewhat limited in function, and I can't explain why the used this technic instead of using a similar approach to the n64's deck, where both slots offer the same more or less.
