NEC P3.
_______

25 Pin D-plug LPT1.                         Plug on end of curly cord.
___________________                         __________________________

Pin 25.--------------------black--------------------------------------|
Pin 15.--------------------red-------------------------------------|  |
Pin  6.---|<In4148--|                                              |  |
Pin 13.-------------|------white--------------------------------|  |  |
                                                  ||   [] [] [] [] [] []
                         view into plug:aerial---><>
Pin  3.---|<1N4148---|                            ||   [] [] [] [] [] []
Pin 12.--------------|-----brown--------------------------------|

NOTE Diode protocol: Kathode---|<diode---Anode