| 摘要 |
PURPOSE:To prevent the deterioration in processing performance by constituting a titled system so that the following read request is awaited so that a store request of the inside of a store buffer is reflected on the following read request, and a chance for processing of the store request is given only at a necessary time. CONSTITUTION:In case when a read request is sent out of an operation processor 1, an address of a read request passes through the first selector 6 and is inputted to an address register 7. Whether a store request of the same block or the same address exists in a store buffer address part 31 or not by an output of the address register 7 is checked by a coincidence detecting circuit 5 of a block and an address, and both said conditions do not coincide, read request processing is executed. In case when no coincidence information is detected, a read address is sent out to a main storage device 2 through a comparator 10 from the address register 7, and written on a word indicated by the read address of the address register 7.
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