| 摘要 |
PURPOSE:To execute program debugging and the function check of hardware, etc., even when no unmounted PCB(printed circuit board) is available by setting the address information of the PCB at an address setting switch, and generating a reply signal when coincidence between the address information sent from a CPU and the above information is obtained. CONSTITUTION:The address information of the PCB is set at the address setting switches 81-85 an address coincidence detecting PCB. When the program debugging is executed, the CPU selects a prescribed PCB, and sends the address information of the PCB to an address bus 5, and the address information is sent to each PCB. At this time, if the address information of the unmounted PCB is set at, for example, the address setting switch 83, a coincidence detection circuit 93 detecting coincidence between them generates the reply signal, and sends it to gate circuits 11 and 13. Thereby, the program debugging and the function check of the hardware, etc., are executed even when the unmounted PCB is not available. |
