It may match up to this from the mame source
https://github.com/mamedev/mame/blob/master/src/mame/drivers/galaxian.cpp#L8822-L8841
"""
ROM_START( mooncrstg )
ROM_REGION( 0x8000, "maincpu", 0 )
ROM_LOAD( "epr194", 0x0000, 0x0800, CRC(0e5582b1) SHA1(946ad4aeb10c0b7b3f93fd24925cc9bcb49e443c) )
ROM_LOAD( "epr195", 0x0800, 0x0800, CRC(12cb201b) SHA1(ebb01ec646b9e015cbcb93f70dfdaf448afefc12) )
ROM_LOAD( "epr196", 0x1000, 0x0800, CRC(18255614) SHA1(b373e22d47c0f7facba13148ca9c462ec9a0d732) )
ROM_LOAD( "epr197", 0x1800, 0x0800, CRC(05ac1466) SHA1(cbf93a8ce0925fa1c073c74f1274b190d9faefaf) )
ROM_LOAD( "epr198", 0x2000, 0x0800, CRC(c28a2e8f) SHA1(9ff6bab1e1185597ba55cb0d6086091a1fce01a6) )
ROM_LOAD( "epr199", 0x2800, 0x0800, CRC(5a4571de) SHA1(2a4170dee105922fc69c99b79f6f328098e81918) )
ROM_LOAD( "epr200", 0x3000, 0x0800, CRC(b7c85bf1) SHA1(cc9f593658ea39c849d80c83ee0c2170cc29879e) )
ROM_LOAD( "epr201", 0x3800, 0x0800, CRC(2caba07f) SHA1(8fec4904e12b4cfb6068784007278be986a3eede) )
ROM_REGION( 0x2000, "gfx1", 0 )
ROM_LOAD( "epr203", 0x0000, 0x0800, CRC(be26b561) SHA1(cc27de6888eaf4ee18c0d37d9bcb528dd282b838) )
ROM_LOAD( "mcs_d", 0x0800, 0x0800, CRC(13932a15) SHA1(b8885c555c6ad7021be55c6925a0a0872c1b6abd) )
ROM_LOAD( "epr202", 0x1000, 0x0800, CRC(26c7e800) SHA1(034192e5e2cbac4b66a9828f5ec2311c2c368781) )
ROM_LOAD( "mcs_c", 0x1800, 0x0800, CRC(24cfd145) SHA1(08c6599db170dd6ee364c44f70a0f5c0f881b6ef) )
ROM_REGION( 0x0020, "proms", 0 )
ROM_LOAD( "mmi6331.6l", 0x0000, 0x0020, CRC(6a0c7d87) SHA1(140335d85c67c75b65689d4e76d29863c209cf32) ) /* Compatible with 82s123 prom */
ROM_END
"""