PROCESSING METHOD AT DATA STATUS CHANGE IN MULTI-TASK SYSTEM

摘要

PURPOSE:To prevent increase of a CPU load by allowing a status change data processing section to process the newest input data in the order of occurrence of status change even when status changes take place frequently in the data status change processing. CONSTITUTION:The state of an input data is monitored by a data input section 1 and when a status change takes place, the status data is inputted to a queue state monitor section 4, which checks whether or not the same packet as the packet of the status change data exists in plural queues A-N is checked and when the same packet exists in the plural queues A-N, the status change data is replaced from the status change data of the plural queues A-N in the unit of words. Thus, the data processing in a data transmission section 3 is executed by using the newest status change data in the order of occurrence. Thus, the increase of the load of a central processing unit is prevented.