To Use The Background Monitor Program - HP 64746 User Manual

To use the background monitor program

1 Answer "background" to the "Monitor type?" question.
2 Answer "yes" to the "Reset map (change of monitor type requires map reset)?"
question.
3 Re-map memory (see the following section on "Mapping Memory").
When you select the background monitor program, a memory overlay is created
and the background monitor is loaded into that area.
Changing the monitor configuration resets the memory map, so you must re-map
memory.
You can use the emulator pod configuration questions listed below to specify how
the emulator will drive the target system during background monitor execution.
•
"Drive background cycles to target system?"
•
"Value for address bits A23-A16 during background cycles?"
•
"Function code for background cycles?"
The 68302 emulator's background monitor disables target system interrupts; also, it
asserts FRZ.
To look at the 68302's internal memory space when using a background monitor, it
must be mapped as target RAM.
When stepping through program execution and an interrupt occurs while the
emulator is executing in background, another step command looks as though it
causes the same instruction to execute. Actually, the instruction does not execute
because the interrupt occurs before the instruction is executed.
Chapter 4: Configuring the Emulator
Selecting the Emulation Monitor Program
115