HP 64780A, Руководство пользователя

Страница: 231 / 546

To enter a range in a trace expression
•
Use the command-line rules (described below) to create your expression in the
entry buffer. Then Choose Trace
→
After(), Trace
→
Before(), or
Trace
→
About(), as desired.
•
Using the command line, enter commands as follows:
•
To specify an address range enter:
address range <expression> thru <expression>
•
To specify a data range, enter:
data range <expression> thru <expression>
•
To specify a status range enter:
status range <expression> thru <expression>
•
To take the logical not of a range, use the not keyword before the range
keyword.
Ranges allow you to qualify analyzer actions on a contiguous set of values. Mostly,
you’ll use address ranges to trigger or store on access to a data block such as a
lookup table. But, you can also use data ranges to qualify a trigger or storage on a
range of data values.
There is only one range term available in the trace specification. Once it has been
used, it cannot be reused. That is, if you specify a range in a trigger specification,
you can’t duplicate it in the storage specification. (The Terminal Interface does
allow this type of measurement, though there is still only one range term. Refer to
the Hewlett-Packard MC68360 Emulator/Analyzer Installation/Service/Terminal
Interface Guide for details.)
Since address is the default range type, you can omit the address keyword. You
can’t omit the data or status keywords if those are the bus parts you want to
qualify.
You can use the logical or operator to combine the range term with several state
qualifiers. See the examples.
Chapter 7: Using the Emulation-Bus Analyzer
Making Complex Trace Measurements
211