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  Interrupt:   21h     Function:   44h     Subfunction:   07h
 
  Title:       IOCTL: Check Output Status
 
  Description:
 
     Returns a code indicating whether the device associated with a
     handle is ready for output. When used with a handle for a file,
     this function always returns a ready status, even if the disk is
     full or no disk is in the drive.
 
     Input           Output
 
     AH = 44h        If function successful
     AL = 07h          Carry flag: clear
     BX = Handle     And for a device
                       AL = 00h (if device not ready)
                          = FFh (if device ready)
                     Or for a file
                       AL = FFh
 
                     If function unsuccessful
                       Carry flag: set
                       AX = Error code (01h, 05h, 06h,or 0Dh)
                       See: ◄Error codes►
                                    -♦-