I used to have a link to show how to region hack a genesis cart to play on NTSC (of a PAL game) but that board no longer seems to be in service. Does anyone know how to do this?? Thanks
Go to address $0001F0 in the ROM, then change the three bytes there to the ASCII string "JUE". Yeah, that's pretty much all there's to it, most games with region lockout look at the ROM header instead of being hardcoded (that's what you get when everybody uses the off-the-shelf routine).
A few games are hardcoded and that method won't work on those, in that case your only option is to hack the game itself =/ (and this procedure will be unique to each game).