DATA SIMULATING DEVICE

PURPOSE:To attain the simulation of a service in a real time for which a timing condition between event data is required by storing time information at the time of monitoring the bus data of a switchboard. CONSTITUTION:At the time of a monitor execution, the event data on a bus 32 are stored in a monitor buffer 35 of an interface circuit 33, and at the same time, counter value information of a clock circuit 36 is stored in a counter value storage means 37, and those data are stored in a bus data storage part 40 of an external storage device 38. At the time of a simulation execution, the event data of the bus data storage part 40 are transmitted to a transmitting and receiving buffer 39 according to the timing of counter value by a data transmitting means 41, and transmitted through a simulation buffer 34 to the bus 32.