| 摘要 |
PROBLEM TO BE SOLVED: To obtain a multiprocessor system, in which a plurality of central processing boards cannot rewrite stored information on a shared memory board one another in a system consisting of the plurality of the central processing boards and the shared memory board. SOLUTION: In this multiprocessor system, the central processing boards 10A to 10F are connected with the memory board 2 through a system bus 3, and the stored information in the memory board 2 is shared among the central processing boards and the information is exchanged. The multiprocessor system is provided with an address generating means for generating address data with which only an area where write is allowed, can be accessed in each central processing board. The address-generating means has a processor 40 for outputting the address data to an address line and also outputting a signal showing whether access is read access or write access, and an address converter 48 for converting a prescribed bit group in the address data on the address line into a specific value in a write operation mode. |
