| 摘要 |
PURPOSE:To sample effective history information by stopping a history operation in a queue state, by setting an idle loop flag when a state enters an idle state, and stopping the write of information on a history memory transiently. CONSTITUTION:The idle loop flag 3 is set at the time of executing an idle processing 2, and is reset by idle loop flag resets 3-1-3-3 when a processing other than the processing 2 is executed. When the flag 3 is set, the write of history information on the history memory 1 is stopped transiently. Meanwhile, when the processing other than the processing 2 is executed, the flag 3 is reset, and the write of the history information on the memory 1 is started. In such a way, it is possible to sample the effective history information without rewriting the history information obtained at a preceding processing by writing level change in the idle state, etc., on the memory 1 repeatedly.
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