Technical data

FIRE Emulator for H8S and H8/300H 8 Q u i c k S t a r t

5. Select frequency (optional)

The CPU can be clocked by an internal (emulator) or external (target) clock source. If the internal

clock is used, the clock is provides by the VCO of the emulator. The setting of the internal clock is

done by the “vco” command.

The current CPU frequency can be displayed in the counter window (Command: Count).

6. Activate the emulator

When the emulator is activated a debug-monitor program is loaded into a hidden emulator memory.

Afterwards, a bondout reset-signal is inactivated and the monitor program starts. This program allows

access to user memory (data.dump, data.list) and cpu-registers, and gives control to start and stop

the emulation.

7. Load application file (optional)

Application can be loaded by various file formats. UBROF format is often used to load code and

symbol information. For information about the load command for your compiler see Compiler.

8. Set breakpoints (optional)

There are several ways to set breakpoints (Command: Break.Set). Breakpoints can be displayed

using the Break.List command.

9. Start application

Application can be started with giving a break address. For example ”go main” starts the application

and stops at symbol main.

vco.clock 20. ; input clock to the EXTAL pin of

; the cpu is set to 20 MHz (only

; necessary if internal clock is

; used)

system.mode emulext ; system works with external target

; clock

data.load.ubrof iarh8s.dbg ; load application file

breakpoint.set main /program

breakpoint.set flags /write

; set program break on function

; main

; set write break on variable

; ’flags’

go ; run application