The switchless mods on the Mega Drive and Saturn are basically the same, as the original D4s/Seb mod works with both with exactly the same code and the same PIC. Although, While it sounds simple enough, the Saturn controller protocol is not compatibile with the Mega Drive's, so some porting is needed.
Controller Protocol Reference: http://www.gamesx.com/controldata/saturn.htm
The switchless mods on the Mega Drive and Saturn are basically the same, as the original D4s/Seb mod works with both with exactly the same code and the same PIC. Although, While it sounds simple enough, the Saturn controller protocol is not compatibile with the Mega Drive's, so some porting is needed.
Controller Protocol Reference: http://www.gamesx.com/controldata/saturn.htm