| 摘要 |
PURPOSE:To raise the processing efficiency, by making each data possess two kinds of retrieving information whose retrieving sequence is different from each other, using selectively these retrieving information and executing the retrieval. CONSTITUTION:In case when a retrieving part 6 of a central processing unit 4 executes successively the retrieval in new and old order of delivery information (n), a gate 7 and a gate 8 are set to a conducting state and an obstructed state, respectively. On the other hand, in case when said part executes successively the retrieval in old and new order of the delivery information (n), the gate 7 and the gate 8 are set to an obstructed state and a conducting state, respectively. Thereafter, the stored contents of a header part 2 are first read out and are accumulated in a register 5. The retrieving part 6 gives access to an address 31 indicated by the retrieving information concerned a2 a storage device 1, and a data d1 is read out and is accumulated in the register 5. Also, the retrieving information a2=35 is extracted from the accumulated contents of the register 5, and thereafter, a data d5 is read out and is accumulated in the register 5. |
