https://blog.faceutil.com/2017/03/16/%ea%b0%80%ec%83%81-fdd-%ed%94%84%eb%a1%9c%ea%b7%b8%eb%9e%a8-2-virtual-floppy-drive-%ea%b0%80%ec%83%81fdd%eb%a1%9c-%eb%94%94%ec%8a%a4%ec%bc%93-%ec%9d%b4%eb%af%b8%ec%a7%80-%eb%a7%8c%eb%93%a4/