| 摘要 |
PURPOSE:To improve the throughput of the whole system by providing an extra signal line between an arithmetic processor and an input/output processor and using its signal to operate a program which prevents a confliction between a data and an address path. CONSTITUTION:The input/output processor 4 checks an input/output part memory use signal 21 when entering a memory use period 201 and if a memory is being used by the arithmetic processor 5, the processor 4 holds itself until an arithmetic period 210 and then enters the memory use period 201. The arithmetic processor 5, on the other hand, checks a signal 20 when entering a memory use period 211 and if the input/output processor 4 is in the memory use period 201, the processor 5 holds itself until an input/output period 200 and then outputs the signal 21 to enter the memory use period 211. The program for said operation is generated previously and programs for the input/output processor and arithmetic processors are generated individually; and then the former program is only inserted into both the latter programs where there is a memory use instruction to perform efficient processing without any bus contention. |
