I've seen examples on how to make a switch for the USA/Japan....is there any way to make a switch for USA/Europe/Japan?
Read the GamesX page carefully please:
http://www.gamesx.com/importmod/gen2import.htm (http://www.gamesx.com/importmod/gen2import.htm)
In short, EU mode for Genesis/Megadrive consoles is the US jumpers combined with 50 Hz screen refresh mode.
-KKC