| 摘要 |
PURPOSE:To use a fact that a certain signal has the expected value within an optional section of a certain action of an information processor to the trigger for history record, by setting the conditions showing said optional section. CONSTITUTION:When an information processor 1 performs a certain action, an action detecting circuit 2 produces an action detecting signal D. A comparator 7 compares the output G of a counter 5 obtained by the signal D with the 1st valye F, and a set signal L is outputted by a timing signal I. An FF9 sets a window signal P at 1 in response to the signal L. Then a coincidence detecting signal N, i.e., the output of an exclusive OR gate is set at 1 when a signal A to be monitored is coincident with the expected value K set previously by an expected value switch 6. At the same time, the signal P is also set at 1. Therefore, an AND gate 11 sets a history record control signal Q at 1. A history recording circuit 12 triggers the signal Q and starts or stops the record of a signal C to be history-recorded of the processor 1. |
