https://blog.faceutil.com/2017/04/01/dsdoom-1-1-2-ndsl%eb%a1%9c-%ec%b6%94%ec%96%b5%ec%9d%98-%ea%b2%8c%ec%9e%84-%eb%91%a0%ec%9d%84-%ed%95%b4%eb%b4%85%ec%8b%9c%eb%8b%a4-%e3%8e%88/