cojag uses a 32-bit processor. the endianness rules are different then.
You mean that also the M68k variant which runs area51t and a few other cojag games is completely different from the jaguar?
To me, it still sounds like the jaguar in MESS hasn't been updated correctly at some point... looking at the debug, it seems the game code is now shifted back of 8 bits. I will dig into it a bit more, tonight