MEMORY SYSTEM OF MULTIPROCESSOR

摘要

PURPOSE:To attain high grade function of a system by storing a multiplex program and input/output information to a local memory to decrease the access frequency from a processor to a common memory. CONSTITUTION:When a control signal of a processor 4 and a DMA circuit 8 is outputted to a memory access control circuit 7, the memory access control circuit 7 discriminates an sccess destination whether it belongs to a common memory 1 or a local memory 5 based on the address information transmitted from the processor 4 or a DMA circuit 8. Then the address signal and the other memory control signal are transmitted to a memory of access destination. An address space specific to each processor is divided into the common memory 1 and the local memory 5 and the address space assigned to the common memory side is limited to a specific area storing a communication area between processors between the processor and the other processor and a specific area storing the system information.