| 摘要 |
PURPOSE:To eliminate a transmission delay of information and to improve the system processing capacity by using a collation means which checks immediately the memory contents when characters, words, etc. are stored in a buffer memory from a fuffer register. CONSTITUTION:A buffer register 21 receives data from an information lead 40 to record it and at the same time delivers the data recorded to an information lead 41. A buffer memory 22 writes and stores the record data of the register 21 at a writing time point TW and at the same time delivers the data stored to an information lead 42 up to a reading time point TR. A collation means 50 draws in leads 41 and 42 and collates the bit code for each corresponding lead through a collation circuit 53. When coincidence is obtained at a check time point TC, the coincidence information is sent to the register 21 via an AND circuit 51. While the dissidence information is sent to the memory 22 via an AND circuit 52 when no coincidence is obtained. When receiving the coincidence information, the register 21 fetches the next transfer information. While the memory 22 erases the collated memory information when receiving the dissidence information. Then the memory 22 reads again the information out of the register 21 and stores it to perform the second collation. |
