Int 2F Fn 112D  CU - Ifsfunc.exe (dos 4.x Only) - Extended Attributes      [N]

   AX = 112Dh
   BL = subfunction (value of AL on INT 21)
       02h get extended attributes
       03h get extended attribute properties
       04h set extended attributes

       Return: CF clear
       else ???

       Return: CX = ??? (00h or 02h for DOS 4.01)
   ES:DI -> SFT for file
   SS = DOS DS

Return: DS = DOS DS

Note:  this function is called by the DOS 4.0 kernel on INT 21/AX=5702h,
     INT 21/AX=5703h, and INT 21/AX=5704h

See Also: INT 21/AX=5702h,INT 21/AX=5703h,INT 21/AX=5704h,INT 21/AH=6Eh