https://blog.faceutil.com/2017/05/04/mame-%ed%9e%88%eb%93%a0-%ec%ba%90%ec%b9%98-%ed%95%9c%ea%b8%80%ed%8c%90%ed%8b%80%eb%a6%b0-%ea%b7%b8%eb%a6%bc-%ec%b0%be%ea%b8%b0-%eb%8b%a4%ec%9a%b4-%eb%8b%a4%ec%9a%b4%eb%a1%9c%eb%93%9c-down/