HP 68302 User Manual page 195

Chapter 5: Debugging Programs
Setting Up Custom Trace Specifications
sequence level stores the states you're interested in while searching for the
window disable state.
If you want to store the window of code execution before and after the
trigger condition, use two sets of paired sequence levels: one window
enable/disable pair of sequence levels before the trigger, and another
disable/enable pair after the trigger as shown below.
Notice that the order of the second sequence level pair is swapped. In
sequence level 2, if the analyzer finds the trigger condition while searching
for the window disable state, it will branch to sequence level 3 where it
continues its search for the window disable state. After this, the analyzer will
remain in sequence levels 3 and 4 until the trace memory is filled, completing
the trace.
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