Method and apparatus for treating interrupt requests and process calls in a combined interrupt and sequence controlled system in data processing systems working at least partially in real time

摘要

By using the single interrupt and process levels (PZE) of individually assigned queues (WS-ME to WS-U.BAT) of the same priority in at least one of the process levels in which in each case only program-controlled work calls of processes of the associated processing level are entered in series, ordering and administration problems for the queues arising from the different priority classification of the individual work calls are eliminated. The entry of work calls in the queues and the setting of the associated request display occurs in each case by means of the ongoing process whilst the monitoring and evaluation of integrated interrupt events (ihx or ipx) occurs independently of the processes and a change-over to operating programs (BP) occurs only in the event of a necessary process interrupt (message INT) or on the release of the common processing unit (message RLC) for the purpose of calling the respective highest priority process without the operating program (BP) controlling the call of the processes being loaded with process-internal administration operations. As a result, all in all a better matching of the system to the conditions of real time requirements is possible. IMAGE