No it's not a unibios problem, it just displays a nice screen instead of just crashing here, the error shows the pc has just gone out of bounds, it should not have this value, it's an emulation problem, which is a little surprising since fbneo is based on mame, I didn't think they touched the emulation part very much, but I don't know it (no linux version !)
For tmnt, I didn't even look ! It's probably not an easy one considering konami reputation, but no idea.
For now I am looking at other things for a little while, I don't spend all my time in emulation...