polling - polling

English: Polling, Programmed I/O
Chinese: Polling, Programmable I/O
Introduction : == is a way for the CPU to decide how to provide peripheral equipment services == The concept of the inquiry method is: the CPU periodically sends out inquiries, == inquires whether each peripheral device needs its service in sequence, and then provides the service, and then asks the next peripheral after the service is completed, and then repeats the cycle. ==

The polling method is easy to implement, but inefficient.

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