Apple II/II+/IIe/IIgs 16-pin Game Port Connector Pinout


            +----------+
       +5v  | 1     16 | NC
        PB0 | 2     15 | AN0
        PB1 | 3     14 | AN1
        PB2 | 4     13 | AN2
C040 Strobe | 5     12 | AN3
        GC0 | 6     11 | GC3
        GC2 | 7     10 | GC1
        Gnd | 8      9 | NC
            +----------+

Pin        Name         Description

1          +5           +5 volt power supply.  Total current drain on this
                        pin must be less than 100mA.

2-4        PB0-PB2      Single-bit (pushbutton) inputs.  These are standard
                        74LS series TTL inputs.
           ____ ______
5          C040 Strobe  A general-purpose strobe.  This line, normally high,
                        goes low during theta-0 of a read or write cycle to
                        any address from $C040 through $C04F.  This is a
                        standard 74LS TTL output.

6-7,10-11  GC0-GC3      Game controller inputs.  These should each be
                        connected through a 150K Ohm variable resistor to
                        +5v.

8          Gnd          System electrical ground.

12-15      AN0-AN3      Annunciator outputs.  These are standard 74LS series
                        TTL outputs and must be buffered if used to drive
                        other than TTL inputs.

9,16       NC           No connection.