| 摘要 |
PURPOSE:To realize the continuation of processing despite an error equal to a fixed fault by registering again data read out of a main memory in a cache memory whose constitution is changed by a constitution changing means and restarting the processing. CONSTITUTION:When the error of information read out of a cache memory 3 is detected by a read data error detecting circuit 12, the information is read out of a main memory 2 by an address held by an error address holding circuit 10. Then a switch control circuit 11 controls a write data selecting circuit 6 and a read data selecting circuit 7 and separates a bit part where an error is detected. Then the constitution of the memory 3 is changed by means of a redundant bit part added previously to the memory 3 and the information given from the memory 2 is registered again for restart of the processing. Thus the relevant processing can be continued despite an error equal to a fixed fault and therefore the reliability of a cache memory controller is improved. |
