https://blog.faceutil.com/2017/04/24/ps1-%ea%b2%8c%ec%9e%84-ecm-bin-%ed%8c%8c%ec%9d%bc-%ec%83%81%ed%98%b8-%eb%b3%80%ed%99%98-%ec%bb%a8%eb%b2%84%ed%84%b0-%ed%94%84%eb%a1%9c%ea%b7%b8%eb%9e%a8-%ec%82%ac%ec%9a%a9%eb%b2%95-%e3%81%b1/