| 摘要 |
PURPOSE:To enable two processor systems to share one of both dual port memories with no limit of distance by providing these two memories between both systems and writing the same contents on both memories. CONSTITUTION:When transmission is carried out to a processor of a system B from that of a system A, data are written on a dual port memory 1a by means of a system bus 2a. Then the information on addresses and data are transferred to a data reception control part 3b via a transmission line 5b. The part 3b performs a writing action on a dural port memory 1b based on those information on the addresses and data. Then the processor of the system B fetches data from the memory 1b. As a result, the content of one dural port memory shared by two processor systems is equivalent to the result of unshared system even though a data bus is distance since the same contents are written both memories regardless of the system that accesses from any system. |
