| 摘要 |
PURPOSE:To achieve copying of a file even during a job is proceeding, by interrupting a transfer if an address to be renewed is a transferred area of a file and executing the transfer processing as to the data of this address. CONSTITUTION:When a processing renewing a file 11 of a file device 10 is produced, data are stored in a data section D of a buffer memory 1 and a write address a1 is set to an address section A. A processing section 5 transmits a control signal H and reads out the data in the file 11 and transfers the data to a file 13 to set a readout address a2 to a pointer B of a signal set section 4. A discriminating section 3 compares and discriminates the addresses a1 and a2. If the data in the address a1 is already transferred, the section 3 generates a control signal C and sets a flag in a flag set section F. When a control section 6 detects this flag set, after the transfer processing is interrupted, the data in the file 11 is renewed by a control signal E. This renewal data is read out from the file 11 and transfers it to the file 13 and restarts the transfer from the file 11. |
