作者: John M. Parchem , Robert T. Short , David N. Cutler
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摘要: A peripheral device interrupt controller maintains a count of pending events for up to preset limit and times delay interval from first event or last servicing before asserting an request. When the request is asserted, then can be serviced as group by central processing unit computer. The overhead separate each thus avoided. set under software control rate at which requests asserted device.