请高手帮我翻译以上三段命令的含义～～～谢！！
SET DIRCMD=/O:N
cls
xmsdsk 12000 x: /y >nul
copy command.com x:\ >nul
path=x:\
set comspec=x:\command.com
set ghox=ghos
:ERROR
IF EXIST tools.ex_ GOTO EXT
echo ERROR: tools.ex_ not found.
echo SORRY: Be will not use the disk.
echo.
GOTO QUIT
:EXT
cls
echo Preparing to start your computer.
echo This may take a few minutes. Please wait...
vol >x:\vol.txt
copy tools.ex_ x:\tools.arj >nul
copy arj.exe x:\ >nul
x:
cd\
请高手帮我翻译以上三段命令的含义～～～谢！！
