How Does Reg PS2 games boot

[charlie_ps2]

Originally posted by Meditate
ok another question b4 ya'll reply, if an original disc has pregrooved stuff to identify it as anoriginal disc an boot, why can't u load a game until the boot sequence is over and swap with a backup?

You can do what you suggest but have to defeat one thing. When you press EJECT to swap the disk the PS2 is rigged by Sony to perform the region and valid PS2 game check. So when you pop a backup in, it fails to load.

A modchip works round this check.