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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the primary purpose of the 8255 PPI?
💡 Hint: Think about the connections between the CPU and other components.
Question 2
Easy
Name the three ports available in the 8255.
💡 Hint: Recall the acronym A-B-C.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does the control word configure in the 8255?
- Operating mode and direction
- Only output mode
- Only input direction
💡 Hint: Consider what the control word does within the device.
Question 2
True or False: The 8255 supports only input functions.
- True
- False
💡 Hint: Think about the capability of peripheral interfaces.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You need to configure Port A as output, Port B as input, and use Mode 2 for Port C. What would be the control word and describe the process?
💡 Hint: Break down the bits and their meanings carefully.
Question 2
Write an assembly code snippet that configures the 8255 in Mode 1, sets Port A as output, and reads from Port B. Explain each step.
💡 Hint: Focus on the sequence of control and data flow between the microprocessor and devices.
Challenge and get performance evaluation