Single Player Circuit Diagram 

         PARALLEL          GAMEPAD     
         PORT (DB-25)         1            
                                    
        Ŀ              Ŀ     (Power may need to be sourced from           
  DATA7  09 Ĵ 1  +5V  the PC's Game Port)
  DATA0  02 Ĵ 2  Clock              
  DATA1  03 Ĵ 3  Reset              
  ACK    10 Ĵ 4  Data                  
  GND    18 Ŀ             5  Unused                  
   |     || Ĵ             6  Unused               
  GND    25 Ĵ 7  Gnd            
                                     

 NOTE: 1) A Pullup Resistor is advised for DB-25
          pin 10.
       2) Use an Electrolytic Cap accross the gamepad
	  side of the +5v supply and GND. Use as large
	  a value as possible.
       3) ">" =  germanium diode.


   Parts List                     qty
   ----------------------------------
   DB-25........................ * 1
   10k resistor................. * 1
   100uf(or higher) Electro cap. * 1
   7 Pin Header
    - 0.156" (3.96mm) spacing
      between pins.
    - 0.045" (1.14mm) diameter   * 1
      round pins.
   PCB to construct it on....... * 1

