NAME
       OpenMonitor -- open a named monitorspec (v36)

   SYNOPSIS
       mspc = OpenMonitor( monitor_name , display_id)
       d0                  a1              d0

       struct monitorspec *openmonitor( char *, ulong );

   FUNCTION
       Locate and open a named monitorspec.

   INPUTS
       monitor_name - a pointer to a null terminated string.
       display_id - an optional 32 bit monitor/mode identifier

   RESULTS
       mspc - a pointer to an open monitorspec structure.
              NULL if monitorspec could not  be opened.

   NOTE
        if monitor_name is non-NULL, the monitor will be opened by name.
        if monitor_name is NULL the monitor will be opened by optional ID.
        if both monitor_name and display_id are NULL returns default monitor.

   BUGS

   SEE ALSO
       closemonitor() graphics/monitor.h