HP 64146A, User Manual

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emulator will attempt to break to the emulation monitor upon accessing
guarded memory; additionally, you can configure the emulator to break
to the emulation monitor upon performing a write to ROM (which will
stop a runaway program).
Analysis
The HP 64146A/B 7700 Series emulator is used with one of the
following analyzers which allows you to trace code execution and
processor activity.
HP 64704 80-channel Emulation Bus Analyzer
HP 64703 64-channel Emulation Bus Analyzer and
16-channel State/Timing Analyzer
HP 64794A/C/D 80-channel 8K/64K/256K Emulation Bus
Analyzer
The Emulation Bus Analyzer monitors the emulation processor using
an internal analysis bus. The HP 64703 64-channel Emulation Bus
Analyzer and 16-channel State/Timing Analyzer allows you to probe
up to 16 different lines in your target system.
Foreground or
Background
Emulation Monitor
When you power up the emulator, or when you initialize it, the
background monitor is used by default. You can also configure the
emulator to use a foreground monitor. Before the background and
foreground monitors are described, you should understand the function
of the emulation monitor program.
The Function of the Monitor Program
The monitor program is the interface between the emulation system
controller and the target system. The emulation system controller uses
its own microprocessor to accept and execute emulation, system, and
analysis commands. The monitor program is executed by the
emulation processor.
The monitor program makes possible emulation commands which
access target system resources. (The only way to access target system
resource is through the emulation processor.) For example, when you
enter a command to modify target system memory, it is the execution
of monitor program instructions that cause the new values to be written
to target system memory.
1-6 Introduction