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4 cards from this section. Quick, good the night before a test.
What is programmed I/O?
Think about how the CPU interacts with devices.
What does polling mean in I/O operations?
Consider how the CPU finds out if a device is ready.
What is the primary function of a device service routine?
Think about what the routine does in relation to devices.
True or False: Memory-mapped I/O shares an address space with main memory.
Consider where devices are located in terms of address.
Design a device service routine for a temperature sensor that the CPU needs to read every minute. Describe its key functionalities and the steps it would take.
Consider how often you need to check the sensor and what commands you would use.
Explain how a conflict in the address space can occur when using memory-mapped I/O. Suggest a solution to avoid this issue.
Think about how you'd manage addresses to prevent two students having the same locker.
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