Practice Functionality Of Isolated I/o (25.4.2) - Programmed I/O Overview

Practice: Functionality of Isolated I/O

Lesson 25.4.2Programmed I/O Overview

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8 questions

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6 sample questions

Question 1.
What is polling in the context of I/O operations?
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Think about the CPU's repetitive checking.
Question 2.
What are control commands?
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Recall the commands you would use to start a process.
3Question 3.
What is the primary function of an I/O module?
- Directly connects devices to CPU
- Manages data transfer between CPU and I/O
- Performs arithmetic operations
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Consider the role of management in data processes.
4Question 4.
True or False: Polling is an efficient method for CPU communication with I/O devices.
- True
- False
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Reflect on how resources are used during repeated checks.
Question 5.
You have a CPU with a 16-bit address bus and need to incorporate 128 I/O devices. Calculate the memory and I/O space allocation needed if you choose isolated I/O.
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Calculate the total addressing capacity available and how much is needed for devices.
Question 6.
Discuss how the choice of polling versus interrupts might affect the design of a real-time system.
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Consider the timeliness of responses for critical systems.

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