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TAD Cabal Trackball To Joystick Conversion


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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.

Edited by yohansen
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  • 6 years later...

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

Edited by Frank_fjs
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