Library /sys$common/syshlp/dtsdtr.hlb INTERRUPT, GENERAL QUALIFIERS, /DISPLAY  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /DISPLAY=number
       /NODISPLAY (D)

    Instructs DTS to print the specified number of bytes (in hexadecimal)
    of data and interrupt messages transmitted to DTR.  The default is
    /NODISPLAY.