| 摘要 |
PURPOSE:To improve the using efficiency of the 2nd buffer memory by securing a certain type of correlation between both replacement actions of the 1st and 2nd buffer memories. CONSTITUTION:A buffer memory LBS of a high speed and small capacity is provided together with a buffer memory MBS of a medium speed and large capacity. When a certain block is replaced for the memory LBS, the address information on a subject block is transmitted to the memory MBS. Here a comparator 38' is set to the memory MBS to detect whether a certain one of blocks to be replaced in the memory MBS includes a transmitted address or not. Then a block to be replaced is decided in the memory MBS. In this case, the block sent from the memory LBS is replaced if it is detected by the comparator 38'. While a block to be replaced is decided by an LRU memory 35 when no block sent from the memory LBS is detected.
|
