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4 cards from this section. Quick, good the night before a test.
What does the CPU do when it needs to communicate with an I/O device?
Think about how the CPU checks for readiness.
What are the two main addressing schemes for I/O devices?
Consider how each scheme relates to memory.
What is the method called when the CPU continuously checks the device status?
Think of what the CPU does while waiting.
True or False: Memory-mapped I/O shares the same address space with memory.
Consider how devices might be accessed in programming.
Evaluate the efficiency of programmed I/O in a scenario with multiple I/O devices that require frequent interaction. Discuss improvements possible.
Consider how operations are prioritized and CPU workload.
Design a simple flowchart that outlines the steps involved in using programmed I/O with an emphasis on addressing I/O devices. Include all commands discussed.
Set clear steps and decisions in your flowchart.
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