| 摘要 |
PURPOSE:To complete the data processing jobs of all priority levels within a fixed time by deciding again the data processing procedures for each time band in a normal state and based on a hardware interruption and a monitor program in an abnormal state respectively. CONSTITUTION:In a normal state of this data processing system, a timer interruption 70 is produced at a designated time point and an executing counter correction part 74 refers to a system normal state control table 75 to update the executing counter. This counter counts the start requests received for each time band with data 4, 5 and 6 of priorities RQ0, RQ1 and RQ2 respectively. Based on these count values, the value of the executing counter is obtained so that the data of all priorities are carried out effectively. In an abnormal mode of this system, a hardware interruption 71 and a monitor program interruption 72 are produced and the part 74 refers to an abnormal state control table 76 to update the executing counter. |
