> We got the original Japanese version of Tekken 3 (TET1/VER.A) and discovered that it > uses different "FL" roms than other sets
It was a known issue. The problem is I don't have access to that board now to dump those ROMs. It was dumped a long time ago way before MAME emulated S12..... back in the Zinc days. There's also a Tekken Tag version with the same issue (need FL ROMs dumped) but again I don't have access to that PCB now.