Many thanks. I will have a look.
ROM_START( ssi )
ROM_REGION( 0x80000, "maincpu", 0 ) /* 512k for 68000 code */
ROM_LOAD16_BYTE( "c64_15-1.ic9", 0x00000, 0x40000, CRC(ce9308a6) SHA1(02653218fe949803742e574eeed01dd421b0a671) )
ROM_LOAD16_BYTE( "c64_16-1.ic8", 0x00001, 0x40000...