So now I can play
- Genesis
- SNES
- NES (Including
Mario Adventure 
)
- Gameboy/Gameboy Advanced
- N64 (without that stupid controller)
- Atari
- I'm sure there are more old ones but I never used them so I don't really give a shit.
I urge everyone to do the same.
I would've done it with my slim PS2, but that would've meant taking it apart, voiding the warranty.