/sys$common/syshlp/helplib.hlb SET, PRINTER, Qualifiers, /POLLED  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /POLLED
       /NOPOLLED (default)

    Instructs the LRDRIVER to run in polled mode instead of interrupt
    mode.

    In polled mode, the printer is checked on a regular basis to
    determine if it is ready to receive additional data. The polling
    timer runs only while there is more data to be sent to the
    printer.