Thank you DOS76, actually I have Kega, however it doesn't seems to have the option to eject disc, only load, boot CD and reset
So I downloaded pico drive core, and found the option "Disc cycle tray status" and worked.
I m curious about it, this is the first time I see you need to load disc 2 in order to play, why is that?
I always thought disc 2 was only for the second half of the game.