Simzy mentions the comment in the ROM’s wanted section. Unknown if that old comment is erroneous, but it was probably first added when TurboSub was emulated a long time ago. If Phil can clear that up, in case there actually was a different pcb roms layout arrangement, hopefully it just leaves Bouncer as remaining game to find.
— Can this comment now be removed from the file? Roms Wanted: Turbo Sub [later version] (improved gameplay, uses 27512 ROMs)"
Most likely turbosub8 was the final release, so maybe? How do we know of the existence of the 27512 ROMs? —