
5.9. Exceptional step execution
• Software interrupt instruction
The step execution cannot be performed continuously for the instruction internal process
of the instructions (undefined instruction, overflow, BRK instruction and INT instruction)
which generate the software interrupts.
Example) INT instruction
NOP
NOP
INT #3
NOP
JMP MAIN
INT_3:
NOP
NOP
NOP
REIT
• INT instruction
Set the software break for the INT instruction internal process and use the Go command to
debug the program using the INT instruction.
Example)
NOP
INT #3
NOP
JMP MAIN
INT_3:
NOP
NOP
REIT
Break point is skipped over
when performing step execution
Address at which program
execution ought to stop
Execute by Go command
Break
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