https://blog.faceutil.com/2017/05/23/x68000-%ec%83%a4%ed%94%84-x68000-%ec%97%90%eb%ae%ac%eb%a0%88%ec%9d%b4%ed%84%b0-xm6-%ec%9e%85%eb%8b%88%eb%8b%a4-xm6-pro-68k-%e3%88%90/