Document Title: [GravitarConv2.html (html file)]
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 (email@example.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 WhiteColors such as "W-Bk" indicate "solid_color-stripe_color" (in this case, a white wire with a black stripe.)