INT 2F - DOS 3+ PRINT.COM - FREEZE PRINT QUEUE TO READ JOB STATUS
        AX = 0104h
Return: CF clear if successful
            DX = error count
            DS:SI -> print queue
        CF set on error
            AX = error code (see AX=0101h)
Notes:  the print queue is an array of 64-byte ASCIZ filenames terminated by
          an empty filename; the first name is the file currently being printed
        printing is stopped until AX=0105h is called to prevent the queue
          from changing while the filenames are being read
SeeAlso: AX=0105h