No that means everyone has the same problem. Kawaks , Nebula , NRX cannot use the m1 Those emulators can only use the m1d 128k m1 = Encrypted m1d =Decrypted Only way Mame will be able to use the encrypted M rom is when someone works out how to add code so it would work in Mame Other than that Mame only uses the decrypted 512k M rom.