To an extent, CPSC is CPS1 running in AES mode. Could service menu access be a disabled option within the roms? If accessing it from a CPSC is unlikely, could the roms be patched to trick emulators into reading them as CPS1 roms? Reason for the topic - it would be interesting to find out if CPSC Street Fighter Zero has a sound test like every other Street Fighter game on CPS[x]. The sound quality is great for CPS1, rather different from the CPS2 version.