Qbert PCB conversion to Reactor possible?

Tornadoboy

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I recently noticed I've got both the sound and trackball PCBs for Reactor in my possession and given how expensive the original main board is it got me wondering, is converting a standard Q*Bert board to Reactor possible?
 
There a sub pcb board you will need.


Track ball interface
 
no instructions. just figuring it out and hacking. here are both memory maps: View attachment 850378
It looks like according to that only 3 connections under the I/O write are different. Being the ignorant bastard I am 😁 does that mean just 3 inputs on the EPROMs need to be juggled around? That's something that could be handled by making some small adaptor boards that go between them and the sockets.
 
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