HP 64782, User Manual, Page: 210 / 554

To specify a trigger and set the trigger position
•
Enter a trigger state specification in the entry buffer; then, choose
Trace
→
After ()
,
Trace
→
About ()
, or
Trace
→
Before ()
.
•
When displaying memory in mnemonic format, position the mouse
pointer over the source line where you want to set the trace trigger,
press and hold the
select mouse button and choose Trace After ,
Trace Before , or Trace About from the popup menu.
•
Using the command line, enter the trace after , trace about , or
trace before commands.
Tracing after the trigger state says states that occur after the trigger state
should be saved; in other words, the trigger is positioned at the top of the
trace.
Tracing before the trigger state says states that occur before the trigger state
should be saved; in other words, the trigger is positioned at the bottom of the
trace.
Tracing about the trigger state says states that occur before and after the
trigger state should be saved; in other words, the trigger is positioned at the
center of the trace.
When the analyzer counts time or states, the actual trigger position is within
+/- 1 state of the number specified. When counts are turned OFF, the actual
trigger position is /- 3 states of the number specified.
Usually, when you enter a trace about command, the trigger state (line 0) is
labeled "about". However, if there are three or fewer states before the
trigger, the trigger state is labeled "after". Likewise, if there are 3 or fewer
states after the trigger, the trigger state is labeled "before".
The state you define after trace after, trace about, or trace before is the state
that will trigger the analyzer and cause states to be stored.
Using the Emulation Analyzer
To specify a trigger and set the trigger position
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