| 摘要 |
PURPOSE:To easily pick up the change from an initial value by displaying internal state data on a display device in order from data at the time of the change from the initial value. CONSTITUTION:When a data processor 1 is started, the value of a register where data displayed on a display device 3 is stored is stored in an initial value data storage part 22. When a data change detecting part 23 detects that required scan out data is different from data stored in the initial value data storage part 22, data is displayed on the screen of the display device in order from this time. Consequently, only scan out data at the time of the occurrence of abnormality and following scan out data are displayed. Thus, data for the occurrence of abnormality is easily picked up and the state after the occurrence of abnormality is recognized. |
