| 摘要 |
PURPOSE:To synchronize the whole multiplexing operation processing system, by providing an information exchange means between CPUs for executing the same specified operation, in a multiplexing operation processing system. CONSTITUTION:Among plural operation processing double devices D1-D3, an information exchange means E is provided on the device D1. At first, a CPU CA1 transmits a command signal C1 at every constant period. A CPU CB1 receives the signal C1 through the means E, sends back a response command signal R1 to the CPU CA1, and after that, executes a fetch processing of an external data. The CUP CA1 executes the external data fetch processing immediately after receiving the signal R1. Subsequently, the CPUs CA1 and CB1 execute processing of an inputted data, and execute occupy-processing of system buses A, B, respectively. When occupancy of the bus A is completed, the CPU CA1 transmits a command signal C2 to the CPU CB1 through the means E. The CPU CB1 transmits a response signal R2 to the CPU CA1 when the bus B has been occupied. Accordingly, a data which has taken an operating synchronization is sent to the buses A, B, and all the CPUs are capable of starting the operation simultaneously. |
