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3 cards from this section. Quick, good the night before a test.
Define Polling in the context of I/O operations.
Remember, it's about constantly checking the device status.
What is the purpose of a status bit?
Think of it as a readiness signal.
What is programmed I/O?
Think about how the CPU interacts with devices.
True or False: In isolated I/O, both memory and I/O devices share the same address space.
Recall the definitions of both I/O addressing methods.
Describe how you would implement a loop in a device service routine to handle polling for a device's readiness.
What coding structure would you use for continuous checking until a condition is met?
Given a memory space of 1MB, explain how many I/O devices can be connected using both memory-mapped and isolated I/O methods.
What is the relation between address space and device capacity in each scheme?
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