https://blog.faceutil.com/2017/05/31/mame-%eb%b8%94%eb%9f%ac%eb%93%9c-%eb%b8%8c%eb%9d%bc%eb%8d%94%ec%8a%a4-blood-bros-%eb%8b%a4%ec%9a%b4-%eb%8b%a4%ec%9a%b4%eb%a1%9c%eb%93%9c-down-%eb%a7%88%eb%a9%94-%ec%98%a4%eb%9d%bd%ec%8b%a4/