PC Keyboard Connector (5-pin DIN)
=================================

  Pin    Description      Direction
   1     +Keyboard clock  In
   2     +Keyboard data   In
   3     +Keyboard reset  Out
   4     Ground
   5     +5 V             Out

PS/2 Keyboard and Mouse Connector  (6 pin DIN/ 6 pin phone)
===========================================================

  Pin    Description     Direction  Phone End Pin
   1     Data            In            B
   2     RESERVED                      A
   3     Ground                        C
   4     +5 V            Out           E
   5     Clock           In            D
   6     RESERVED                      F
  Shield Ground                      Shield

Game Adapter:
=============

 Pin  Description
  ----------------------------------------
  1   +5 VDC
  2   Button 1
  3   Position 0  (X Coordinate)
  4   Ground
  5   Ground
  6   Position 1  (Y Coordinate)
  7   Button 2
  8   +5 VDC                  JOYSTICK "A"
  ----------------------------------------
  9   +5 VDC                  JOYSTICK "B"
 10  Button 3
 11  Position 2  (X Coordinate)
 12  Ground
 13  Position 3  (Y Coordinate)
 14  Button 4
 15  +5 VDC

Power Supply Connections:
=========================
PC and XT System board         AT System board

  Pin          Function        Function
   1-1         Ground          Power good
   1-2         Ground          +5V
   1-3         -5V             +12V
   1-4         +5V             -12V
   1-5         +5V             Ground
   1-6         +5V             Ground
   2-1         Power Ground    Ground
   2-2         KEY             Ground
   2-3         +12V            -5V
   2-4         -12V            +5V
   2-5         Ground          +5V
   2-6         Ground          +5V

10BASE-T twisted pair wiring
----------------------------

       ----------------+
                  -----+ 1    Tx+
                  -----+ 2    Tx-
                  -----+ 3    Rx+
                  -----+ 4
                  -----+ 5
                  -----+ 6    Rx-
                  -----+ 7
                  -----+ 8
       ----------------+


  crossover wiring is
          PIN   PIN
         -----------
           1  -  3
           2  -  6
           3  -  1
           6  -  2
