HP 64783A, User Manual

Page: 682 / 816

The foreground monitor, in contrast to the background monitor, allows servicing of
interrupts. When the foreground monitor is not busy performing some action,
interrupts are allowed. The interrupt routine must return control to the monitor
within a reasonable period of time or the monitor may timeout if it attempts to do
something. The level of interrupt that can be recognized by the monitor can be
controlled through a configuration question:
cf monint=0
Resetting into the foreground monitor
If you have successfully established operation of the background monitor, or if you
have decided that you cannot use the background monitor because you need certain
MC68040 features, then it is time to evaluate the foreground monitor. The first
thing to do is to enter the foreground monitor from reset. Perform the following
command sequence to enter the monitor.
1 Reset the emulator, and the target system if necessary, using whatever reset
procedure you determined to work.
2 Configure the emulator, as follows:
cf mon=fg
cf monaddr=addr as appropriate for the target system
cf monlock=<en,dis> as appropriate for the address mapping
cf monint=0
cf cache=en
cf mmu=en
cf ti=en
cf wait=<en,dis> as appropriate for the target system
3 Set up a trace to capture all MC68040 cycles. Background cycles do not need
to be traced to see foreground monitor operation.
tg any
tsto any
tck -u
t
4 Execute the command: rst -m
Chapter 18: Connecting the Emulator to a Target System
Installing Emulator Features
652