@Trash80toHP_Mini BTW, if that worked, and only as time permits, be sure to test all four of the TriPEx ROMs. HAP might need one of them, it seems like. I'm still confused about exactly what he has, but it sounds like he has two systems and one ROM.
I think if James in UK and Hap get working ROMs for their systems and you have a working ROM for your system, then everyone we know of, with a PEx, has a working ROM.
Also, do you want to try the experiment of swapping the PLCC ROMs to the DigiBarn version and then trying the Digibarn ROM -- assuming there's any difference between them and what you already have? I can whip up a set, if needed/wanted.