| 摘要 |
PURPOSE:To attain parallel operation of microprocessors at the reading of common memories by forming a common memory in each microprocessor. CONSTITUTION:The microprocessors (MPs) 1, 2 include common memories 3, 4 respectively. When the MP 1 is to execute a writing request in the common memory, information on a local bus signal line 102 is controlled by a common memory control device 20 and a waiting signal is sent to the MP 1. Then, a signal on a control signal line 110 is started to open a base gate circuit 12, a signal line 102 of the MP 1 is connected to a write-only bus signal line 105 and bus selecting circuits 10, 11 are switched to the signal line 105 to connect main storages 3, 4 to the signal line 102 of the MP 1. Then, a write command is sent to write data in all the common memories simultaneously. |
