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Thread: TAD Cabal Trackball To Joystick Conversion

  1. #1
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  2. #2
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    Good work, as usual.

    I have a Cabal PCB that has the Joystick Sub board, and can verify that the 2 enable pins of the 74LS244 are indeed connected to pin 15 of the daughterboard.

    My board also has the 2 extra hookup wires on the edge connector.
    Last edited by yohansen; 9th April 2013 at 01:57 PM.

  3. #3
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    Resurecting an old thread...

    Just performed the conversion and it went smoothly, works great.

    I plan on drawing up a proper schematic and clearing a few things up.
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    Actually made a small batch of kits a while back with a proper PCB, ROMs, etc.
    https://m.facebook.com/story.php?sto...37999229703756

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    Here's my contribution to the marvelous work of @Elgen

    My intent is to simplify and better document the process for anyone wishing to perform this conversion.

    • You will need 4 x 27512 EPROMS and a suitable eraser / programmer
    • 1 x LS74244
    • Pin connector headers, male, 2.54mm pitch
    • ROMS 6, 7, 8, 9 on the CABAL PCB need to be removed and replaced with ROMS from the CABAL WORLD JOYSTICK ROMSET
      • CABAL ROM 6 = 10.6j
      • CABAL ROM 7 = 11.6h
      • CABAL ROM 8 = 12.7j
      • CABAL ROM 9 = 13.7h
    • The 2 socketed D4701AC's on the main CABAL PCB (they're near the Jamma connector) need to be removed and replaced with the JOYSTICK SUB PCB
    • For the roll feature, run a patch wire from Jamma pin 15 to Jamma pin 24 (TEST SWITCH TO P1B3) & Jamma pin R to Jamma pin b (SERVICE SWITCH TO P2B3)


    Below is the original PCB as designed by TAD:

    CABAL-JOY-SUB-ORIGINAL-PCB.jpg

    This is my recreation of it:

    CABAL-JOY-SUB-TOP.png

    You can download the Gerber files and have this PCB produced here: CABAL-JOY-SUB-GERBER.zip

    Schematic:

    CABAL-JOY-SUB-SCHEMATIC.png
    Last edited by Frank_fjs; 1st June 2019 at 03:55 PM.
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