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CPU operates at speeds much faster than the fastest I / O device devices operate at different speeds Bursts of data Block data transfer required for some devices Coordination Several devices perform I / O simultaneously Unexpected input Various input formats Status information needed for each device Chapter 9 input / input modules Functions Recognizes messages from device(s) addressed to it and accepts commands from the CPU Provides a buffer where the data from memory can be held until it can be transferred
- Author
- Waqas Ahmed
- Language
- EN