| 摘要 |
PURPOSE:To increase the data processing efficiency, by executing the existence of a sector which is newly used with the hardware and furthermore adding and detecting a preference level. CONSTITUTION:A data holding circuit 2 displays that plural sectors are used. A level selecting circuit 5 gives a level to the data through the circuit 2 and readouts a reference data. An address generating means AG produces an address to readout the circuit 2. In case a sector which can be newly used in a main memory is searched, the circuit 2 is readout based on the means AG. Then the level is selected for the readout data to decide a sector that is newly used. |
