| 摘要 |
PURPOSE:To avoid a double storage of a common data block for a data file control system, by fractionating the data to be stored in the file into plural data blocks. CONSTITUTION:A transfer key code is transferred to a register 6 from a transfer control part 4, and at the same time a start signal is transmitted to an address register 10. Thus the selection codes are delivered successively to a register 7 and a comparator 9 from an address conversion table 12. At the same time, the physical addresses of data blocks are delivered successively to a data file 13 and the data transfer part 4. Both the transfer key code of the register 6 and the selection code of the register 7 are calculated at an AND arithmetic part 8. Then the data blocks read out of the file 13, in case a coincidence is obtained at a comparator 9 between the result of operation and the selection code of the register 7, are set in good order to a transfer data receiving part 5 under the control of the part 4. |
