OTHER CONTROL ITEMS

s        STOP

U tag    Set the current line number to 'tag'

         NOTE: The stack should be empty whenever this item
         is found.  This item should also be used to
         initiate consistency checks during assembly.

z tag    The value of the tag may be used to set control
         bits in the assembler.
         The value is generated by the statement:
                   control n      e.g. control 16_1010

y tag    As for 'z' but generated by diagnose n.


e tag    Signal Event.
         The tag is a constant describing the event to be
         signalled - one bit set corresponding to the event;
         the bits are numbered from zero (least significant)
         to fifteen (most significant).  If the sub-event
         and extra information fields have been specified
         their values will be described on the top of the
         stack.

         e.g.
         signal event 2                e4
         signal event 2, X             @xe4
         signal event 2, X, Y          @x@ye4

o v,lab  On Event

         The first parameter, v, is a 16-bit value with a
         bit set (2\\n) for every event trapped.  The second
         parameter, lab, is the internal label defining the
         finish for this event clause.

         e.g.

         on event 1,2 start           o6,10

              .
              .
         finish                       :10

G n,text The text is a string constant to be used as the
         external alias for the next descriptor to be
         defined.  The parameters to G are the same as those
         for '.






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