public override bool IsPlatformMatch(byte[] rom) { //15Eh 2 Header Checksum, CRC-16 of [000h-15Dh] if (rom.Length < 0x200) { return(false); } byte[] bytesToHash = new byte[HeaderCrcRegionSize]; Array.Copy(rom, 0, bytesToHash, 0, HeaderCrcRegionSize); var hash = Crc16.CalculateHash(bytesToHash, 0, bytesToHash.Length); if ((hash & 0xFF) == rom[0x15e] && (hash >> 8) == rom[0x15F]) { return(true); } return(false); }