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2 cards from this section. Quick, good the night before a test.
What is polling in the context of I/O operations?
Think about how a teacher might check if students are ready before starting a class.
What are the three types of commands used in I/O operations?
Recall how each command serves a different purpose in managing devices.
What is the main downside of CPU polling for I/O device status?
Think about how a teacher's uninterrupted checking can hinder other classroom activities.
True or False: In memory-mapped I/O, the same address space is used for memory and devices.
Recall how both types of data storage use similar numbering schemes.
Analyze a scenario in a computer system where an I/O device fails to respond. What steps would you propose for the CPU to handle this situation effectively using programmed I/O and interrupts?
Consider how program flow changes when a device response fails and the potential need for a recovery method.
Design an instruction set for an isolated I/O model that incorporates a control command, a test command, and a read command for a hypothetical output device.
Break down each phase into parts and outline how the commands will interact based on functionality.
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