The fact that some Pin are used to establish a difference between Joy1 and Joy2 (com1 and com2 on CPC ?) mais be perhaps used too with Sega joys to achieve some additionnal buttons (presing Button 2 on SMS put the Com2 on so the control may be switched to Joy2...got to be verified).
[[Category:HardwareInput Device]][[Category:Peripherals]][[Category:Stub]][[Category:DIY]]