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Chapter 4: Connecting the Emulator to a Target System
Installing the background monitor
The emulator allows you to choose between use of a background and foreground
monitor.
The background monitor is normally used unless interrupts need to be serviced
while in the monitor. Other conditions associated with the 6833x communication
facilities may also require the use of the foreground monitor.
The background monitor does not show cycles to your target system. It uses the
built in BDM mode of the processor. Therefore, the background monitor is
transparent to your target system. Even though the background monitor does not
show any cycles to the target system, the initial vector fetch cycles are shown to the
target system. Memory access cycles caused by the background monitor are called
background cycles. All other cycles are called foreground cycles.
Resetting into the background monitor
There are three ways to initially get into the background monitor. The first of these
ways is to enter the monitor from reset. Perform the following command sequence
to enter the monitor:
1 Reset the emulator and the target system if necessary using any reset procedure
you determined to work adequately.
2 Configure the emulator by entering the following command:
cf mon=bg
3 Set up a trace to capture all MC6833x cycles, including background monitor
cycles, by entering the following commands:
tck -b
tsto any
tg any
t
Installing Emulator Features
77
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