https://blog.faceutil.com/2017/03/28/msx-%ed%85%8c%ea%b7%b8%ec%a0%b8-thexder-%e3%83%86%e3%82%af%e3%82%b6-%eb%8d%b1%ec%8a%a4%eb%8d%94-%e3%81%b5/