| 摘要 |
PURPOSE:To mix step execution parts and non-step execution parts to execute them without a private debugging circuit by providing not only a one-step interruption permitting flag but the function which masks the effect of this flag. CONSTITUTION:A one-step interruption permitting flag 11 and a one-step interrupt mask flag 12 are inputted to a mask flag circuit 10, and the circuit 10 generates a one-step interruption 13. That is, the one-step interrupt is not generated when the mask flag is turned on though the permitting flag is turned on, and the interruption is not generated similarly if the permitting flag is turned off independently of the state of the mask flag. When the step execution should be performed, the permitting flag is turned on before execution, and thereby, the one- step interrupt processing is performed only in parts where step execution should be executed. |
