Modder puts Super Mario 64 on PS2, hacks in co-op, and adds online multiplayer with the N64 version, all through the power of Sony's secret PS1 chip: "It works much better than ...

It's similar on the N64 end, where Carl uses a customized N64 cart he previously built with another Pico built-in. From there, he 'simply' adds a second instance of Mario to each game, and transmits ...
Skoar! on MSN

Modder brings Super Mario 64 to PS2 with co-op and online multiplayer, thanks to PS1 chip magic: “It exceeded my expectations”

Imagine playing Super Mario 64 on the PS2 with cooperative gameplay and online multiplayer that connects to the N64, all powered by a PS1 chip!