Special commands for Hitachi micros

Some commands are available only on the H8/300 or the H8/500 configurations:

set machine h8300

set machine h8300h

Condition for one of the two variants of the H8/300 architecture with `set machine'. You can use `show machine' to check which variant is currently in effect.

set memory mod

show memory

Specify which H8/500 memory model (mod) you are using with `set memory'; check which memory model is in effect with `show memory'. The accepted values for mod are small, big, medium, and compact.

target sim

Debug programs on a simulated CPU

After specifying this target, you can debug programs for the simulated CPU in the same style as programs for your host computer; use the file command to load a new program image, the run command to run your program, and so on.

As well as making available all the usual machine registers (see info reg), this debugging target provides three additional items of information as specially named registers:

cycles

Counts clock-ticks in the simulator.

insts

Counts instructions run in the simulator.

time

Execution time in 60ths of a second.

You can refer to these values in expressions with the usual conventions; for example, `b fputc if $cycles>5000' sets a conditional breakpoint that suspends only after at least 5000 simulated clock ticks.

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