| 摘要 |
PURPOSE:To omit the procedure forming queue and to process the reception of transfer request and data transfer efficiently, by providing a table for managing the data transfer request. CONSTITUTION:Data reception sections P1-Pn store data received from a communication circuit 1 in buffers 2-4 temporarily, and when the buffers are occupied, request signals A1-An requesting the data transfer and level designation signals La-Le are given to a control section 7. When the control section 7 receives the signals, a flag is set to flag set sections a2, b1 and cn of a table 6 of a main storage section 5. The control section 7 has a means which sequentially scans the table 6 for retrieval in addition to a flag set means. Thus, as a result of scanning, since a flag is detected at the set sections a2, b1 and cn, the control section 7 picks up a data D2 of the buffer 3, a data D1 of the buffer 2 and a data Dn of the buffer 4 respectively and stored them in a buffer 9. |
