INT 21 - DOS 2+ - SET FILE'S DATE AND TIME
        AX = 5701h
        BX = file handle
        CX = new time (see AX=5700h)
        DX = new date (see AX=5700h)
Return: CF clear if successful
        CF set on error
            AX = error code (01h,06h) (see AH=59h)