Advanced store-in system for a hierarchy memory device

摘要

A memory access control system for an information processing apparatus having a buffer memory and a main memory wherein when a store or access request is generated, in the case where the data block in the address to be accessed does not exist in the buffer memory, the store requested data from a data register is written into the buffer memory before the first data in the data block read out from the main memory is written into the buffer memory, and the data register is released to receive the next request.