| 摘要 |
PURPOSE:To improve the efficiency of processing of a channel device by providing two sets of buffer areas, using them alternately for a stack and making the stack of an interruption request and the processing of the interruption request in parallel. CONSTITUTION:On receiving the interruption request from a channel device 21, the channel connection section 15 of an input/output controlling device 16 starts an interruption controlling section 10 immediately. The interruption controlling section 10 reads the information of interruption request from a channel connection section 15, and stores in the area of a buffer designated by a pointer 13, and renews the pointer 13 to point a next storage area. Thereby, the channel connection section 15 releases a busy state and enables to accept a next interruption request. The interruption controlling section 10 starts an event analyzing section 14 to complete a processing. The event analyzing section 14 discriminates a buffer in the stack by the pointer 13, and switches the pointer 13 to other buffers 11 or 12 to process the interruption request of the buffer 11 or 12. Then, the stacked interruption request is taken out successively and processed.
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