| 摘要 |
<p>PURPOSE:To provide a dual CPU system capable of realizing high system throughput by reducing the overhead of the data transfer of one local memory and the I/O device connected to another local bus without using an expensive dual port memory. CONSTITUTION:In a memory-shared dual CPU system, a bus conversion circuit 3 connecting the buses 8 and 9 of a bi-directional CPU system to each other is provided. The bus conversion circuit 3 is provided with a local bus mediation circuit permitting the access to the local memory 6 of the other CPU 4 from one CPU 1, a shared area setting register displaying the shared area within a local memory 6 and an address conversion circuit converting the memory address of the CPU 1 into the memory address within the shared area of the CPU 4.</p> |
