This is a simple reproduction I made of the joystick sub board you can find on Cabal PCBs.
I kept the original design of the original sub board which is this:
With the only difference I put the 74LS244 on top of PCB:
The reproduction is something not really great perhaps, someone else already made it it the past like Elgen:
But it’s useful if you want to convert a Cabal PCB from trackball to joystick version using at same time the proper ROM set.
That’s all, simple but effective!