autoexec.bat写法:
xmsdsk.exe 20480 /y>NUL
FINDRAMD>NUL
IF %RAMDRIVE%#==# ECHO Can't create RAM disk!
IF %RAMDRIVE%#==# GOTO END
MD %RAMDRIVE%\TEMP --虚拟盘上创建目录
SET TMP=%RAMDRIVE%\TEMP --设置环境变量
SET TEMP=%RAMDRIVE%\TEMP
COPY \COMMAND.COM %RAMDRIVE%\>NUL
SET COMSPEC=%RAMDRIVE%\COMMAND.COM --将命令解释器放置到虚拟盘上,提高性能。建议使用4DOS替换COMMAND.COM