MULTIPROCESSOR DEVICE

PURPOSE: To effectively use the memory area of a shared memory by dividing the address space of each of processors constructing a multiprocessor into plural memory areas, assigning an access mode to each of divided memory areas, and setting these memory areas so as to have accesses to the same memory space of the shared memory. CONSTITUTION: A multiprocessor device consists of a memory/bus control means 101 which controls a shared memory 102 and also controls the bus of an arbiter, etc., of a common bus 103, the bus control means 104 which connects the processors 105 with the bus 103, the local memories 106 of the processors 105, and the interface signal lines 109 to 112 set between the processors 105 and the means 104. When the bus right grant is given from the means 101, a read access is applied to the memory 102, then, the output of data on the access address of the memory 102 is received, and the data are transferred to the processors 105 to complete the access.