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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the purpose of the Control Word in the 8255?
💡 Hint: Think about what setups you need for input and output.
Question 2
Easy
State the hexadecimal representation of the control word for Reading Switch Inputs.
💡 Hint: Convert the binary value to hex after understanding its bits.
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 9AH configure?
- Port A as Output
- Port B as Output
- Port B as Input
- Port C Lower as Output
- Port A as Input
- Port C Upper as Output
💡 Hint: Recall the binary representation of the control word.
Question 2
True or False: The accumulator holds data before issuing commands to output to peripheral devices.
- True
- False
💡 Hint: Reflect on the role of the accumulator in assembly programming.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
How would you modify the program to handle 8 switches instead of 4? Specify the required changes in the control word and code.
💡 Hint: Think about how to extend the current setup to accommodate the additional switches.
Question 2
What would happen if you connected more than 4 LEDs to Port C? Discuss how this could impact the readings and functionality.
💡 Hint: Consider the input and output structure and why it is pre-defined.
Challenge and get performance evaluation