@krullbeast said in games i can't get to work on pi4b driving me wakuwaku:

my set-up running MAME 2003 with non-merged 0.78 roms

From my experience, there is a 99.99% chance a part of that sentence is wrong, meaning either you are not using MAME2003 for those games, or you are not using 0.78 romsets for those games, logs would confirm. The 0.01% remaining would be that that your files are corrupt or that MAME2003 simply can't run those games (it'd be surprising but never say never about a MAME game flagged as working properly while it actually doesn't). Which leads to the main question: why you are using MAME2003 on a pi4 to run those games ? There are multiple options that are plain better, almost any other option actually.

@krullbeast said in games i can't get to work on pi4b driving me wakuwaku:

RetroPie Version Used: standalone version in PINN

So what is that exactly ? One of those 3rd party builds that are not supported here ? It would explain a lot about your issues.

NEO-GEO CD for Dummies