Selecting The Emulation Monitor Program - HP 64767 User Manual

Chapter 5: Configuring the Emulator

Selecting the Emulation Monitor Program

Selecting the Emulation Monitor Program
In order to select the type of monitor program used by the emulator, you must first
start the configuration interface and access the "Monitor Type" configuration
section (refer to the previous "Using the Configuration Interface" section).
The emulation monitor program is an 80186 program that the emulation
microprocessor executes as directed by the HP 64700 system controller. The
emulation monitor program gives the system controller access to the target system.
For example, when you modify target system memory, the system controller writes
a command code to a communications area and switches, or breaks, emulation
processor execution into the monitor program. The monitor program reads the
command code (and any associated parameters) from the communications area and
executes the appropriate machine instructions to modify the target system locations.
After the monitor has performed its task, emulation processor execution returns to
what it was doing before the break.
The emulation monitor program can execute out of a separate, internal memory
system known as background memory. A monitor program executing out of
background memory is known as a background monitor program.
The emulation monitor program can also execute out of the same memory system
as user programs. This memory system is known as foreground memory and is
made up of emulation memory and target system memory. A monitor program
executing out of foreground memory is known as a foreground monitor program.
The emulator only allows foreground monitor programs in emulation memory.
The emulator firmware includes both background and foreground monitor
programs and lets you select either. You can also load and use a customized
foreground monitor if needed.
This section shows you how to:
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Select the background monitor program.
Select the foreground monitor program.
Use a customized foreground monitor program.