To Break To The Monitor - HP MC68040 User Manual

Chapter 4: Using the Emulator
Using Processor Run Controls

To break to the monitor

• Choose Execution→Break.
• Using the command line, cause the emulation processor to break from execution of
your target program and start execution in the monitor by entering:
break
The emulation monitor is a program that provides various emulation functions,
including register access and target system memory manipulation. During a run that
is restricted to real-time execution, you must break execution to the monitor before
executing any emulation commands that access registers, emulation memory that is
not dual-port, or target system memory. You also can use the break command to
pause your target program execution.
Execution breakpoints and run until <address> commands can be used to break to
the monitor at selected points in your target program.
The status line changes to "Running in monitor."
If you enter a break command while the processor is in a wait state (hung bus
cycle), the emulator may terminate hung target bus cycles in an attempt to
transition into the monitor. A bus cycle is considered hung when the target system
has not provided the required termination within 300 ms. The emulator never
attempts to terminate hung bus cycles in program space. The emulator will
generate a status message for each address where it forcefully terminates a bus
cycle. You can determine emulator status (Display→Status) to get information
about a hung bus cycle before initiating a break (and accept the termination side
effect) or use the reset command.
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