Cashe memory arrangement comprising a cashe buffer in combination with a pair of cache memories

摘要

In a cache memory arrangement used between a control processor (21) and a main memory (22) and comprising operand and instruction cache memories (31, 32), a cache buffer circuit (40) is responsive to storage requests from the central processor to individually memorize the accompanying storage data and store address data and to produce the memorized storage data and store address data as buffer output data and buffer output address data together with a buffer store request. Responsive to the buffer store request, first and second cache control circuits (36, 37) transfer for accompanying buffer output address data to the operand and the instruction cache memories, if each of the operand and the instruction cache memories is not supplied with any readout requests. Preferably, first and second coincidence circuits (51, 52) are coupled to the cache buffer circuit and responsive to the readout requests to compare all of the memorized store address data with the accompanying readout address data and to make the first and the second cache control circuits preferentially process the buffer store request prior to each of the readout requests. The buffer circuit may comprise two pairs of buffers (41, 42; 63, 64), each pair being for memorizing each of the store address data and the storage data. An address converter (70) may be attached to the arrangement to convert a logical address represented by each address data into a physical address.