Apple II/II+ Keyboard Connector Pinout


         +----------+
    +5v  | 1     16 | NC
 Strobe  | 2     15 | -12v
  Reset  | 3     14 | NC
     NC  | 4     13 | Data 1 
 Data 5  | 5     12 | Data 0
 Data 4  | 6     11 | Data 3
 Data 6  | 7     10 | Data 2
    Gnd  | 8      9 | NC
         +----------+

Pin        Name    Description

1          +5      +5 volt power supply.  Total current drain on this pin must
                   be less than 120mA.

2          STROBE  Strobe output from keyboard.  This line should be given a
                   pulse at least 10 microsecond long each time a key is
                   pressed on the keyboard.  The strobe can be of either
                   polarity.
           _____                    _____
3          RESET   Microprocessor's RESET line.  Normally high, this line 
                   should be pulled low when the <RESET> key is pressed.

4,9,16     NC      No connection.

5-7,10-13  Data    Seven bit ASCII keyboard data input.

8          Gnd     System electrical ground.

15         -12v    -12 volt power supply.  Keyboard should draw less than
                   50mA.