P-ROC is not rom based (only old hardware is because it was designed to run very simple dedicated hardware)these days its just cheaper to use a pc so roms are not needed any more.
To get P-ROC code to run in vp(if i read the other thread correctly, only scanned it) You run the P-ROC code as is (python) And it talks to vp through a special version of the pinMAME.dll that talks to the python.
No roms / emulation involved. Your basically running the source, using pinMame as a middle man between P-ROC and vp.



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