| 摘要 |
PURPOSE: To delete and reset a flag for each word by corresponding a first flag indicating whether valid data is stored or not to a second flag indicating whether coincidence is detected or not and holding or deleting a flag for each word. CONSTITUTION: In a state in which three selecting signal lines 61, 62, 63 are all '0', when '0' indicating that there is no coincidence in the past is stored in a second flag register 55, a signal line 58 is in a '0' state and '1' is outputted as an output of a selecting circuit 59. When a signal of '1' is applied to a vacant flag data line 66 in the state and a clock pulse is applied to an idle flag clock line 65, the idle flag is stored in a first flag register 51. That is, in this case, a memory word 11 corresponding to the second flag register 55 in which '0' indicating that there is no coincidence in the past is stored is changed en bloc to a vacant state. |
