Practice Basic Requirements For I/o Operations (25.1.3)

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6 sample questions

Question 1.
What is meant by programmed I/O?
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Think about how devices and CPU communicate.
Question 2.
Define memory-mapped I/O?
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Consider the relationship between memory and device addresses.
3Question 3.
What does I/O stand for?
- Input/Output
- Inside/Outside
- Integrated/Organized
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Think about what the CPU works with.
4Question 4.
Is polling an efficient way to check device status?
- True
- False
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Consider how the CPU manages its resources.
Question 5.
Explain a system where using memory-mapped I/O could be more advantageous than isolated I/O. What factors would influence this choice?
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Consider complexity versus simplicity.
Question 6.
If a CPU needs to interface with 100 dedicated devices using isolated I/O, calculate the minimum address space required for the devices if using 16-bit addressing.
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Think about binary addressing in terms of distinct addresses.

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