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Document Title: [GravitarConv2.html (html file)]

Gravitar Control Panel in a Space Duel Cabinet

Gravitar Control Panel in a Space Duel Cabinet

Submitted by John Lee (jhlee@hac2arpa.hac.com)

The following describes how to connect an Atari Gravitar control panel to the Atari Space Duel cabinet harness. Both the Gravitor control panel and game PCB are virtual drop-in substitutes into the Space Duel cabinet. However, while the Gravitar panel has a 12-pin Molex-type connector, Space Duel uses a 24-pin AMP-type connector. Fortunately, the Space Duel control panel signals are a superset of Gravitar's.

In my own conversion, I made a small adapter that plugs in between the Gravitar control panel and the Space Duel harness. With this adapter, no alterations are made to the harness or control panels and it is easy to switch between the games. The Gravitar game PCB requires no alterations.

The control panel wires on the Space Duel harness that are not explicitly listed are not connected. The pin numbers given are for connector J24/P24 on both game's schematics (the connector at the control panel.) For your reference, the wire colors and the corresponding pins on connectors P19 and P20 at the game PCB are included.

Remember, no warrentees, express or implied, are given. Use this information at your own risk. I am not responsible for any damages that may occur. Your mileage may vary. All I can say is that it works for me. :-) Feel free to contact me if you have any questions.

--John Lee (jhlee@hac2arpa.hac.com)

---------Gravitar--------    Game PCB	 ---------Space Duel--------
---Control---	Colr  Pin    --Pin--	 Pin  Colr   ---Control---
Start2 LED	  W-Bk  1	      P20-J	   13   Y-Bu   Start LED
Start2 Sw	    Bu    2	      P20-11	 7    W-Bu   Select
Rot L		      W     3	      P19-E	   3    W-R    Rot R Player 2
Rot R		      O     4	      P19-5	   9    W-G    Rot R Player 1
Thrust		    Y     5	      P19-6	   14   Y-V    Start Sw
Fire		      Gn    6	      P19-4	   5    W-Y    Fire Player 2
Shields		    Bu    7	      P19-3	   11   Y-O    Fire Player 1
Start 1 LED	  V     8	      P20-7	   6    W-Gn   Select LED
Start 1 Sw	  Gy    9	      P20-M	   4    W-O    Thrust Player 2
Sw Gnd		    Bk    10      P20-12	 21   Bk     Sw Gnd
+5V		        R     11      P20-Y	   23   R	     +5V
Prot. Gnd	    Gn    12        --	   24   Gn     --

Color Key:
    Bk	Black	    Gy	Gray	    V   Violet
    Bu	Blue	    O	Orange	    Y   Yellow
    Gn	Green	    R	Red	        W   White
Colors such as "W-Bk" indicate "solid_color-stripe_color" (in this case, a white wire with a black stripe.)