| 摘要 |
PURPOSE:To reflect a memory access request on a main storage by invalidating a flag for displaying the validity of a main storage physical address to be separated in a conversion table after the end of the execution of cache discharging operation. CONSTITUTION:At the separation of the main memory, V bits are reset by a V-bit reset means 15 after the execution of cache discharging operation. When a memory access request accompanied with a memory address for indexing a conversion table 8 in which a main memory physical address to be separated is registered is generated during a series of operation for cash discharging, the memory request can be reflected on the main memory if a directory memory 9 in which the memory address of the memory access request is registered is not invalidated. The address of a storing request generated after invalidating the memory 9 is stored and the cache discharging operation is continued, so that stored data can be reflected on the main storage.
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