Practice - Program 1: Static Output to Port A
Practice Questions
Test your understanding with targeted questions
What is the purpose of the 8255 PPI?
💡 Hint: Think about how a CPU interacts with devices.
What does Mode 0 represent in the context of the 8255?
💡 Hint: Recall what handshaking means in data communication.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the hex value of the control word for configuring Port A as output?
💡 Hint: Refer back to your control word calculation.
True or False: The control word is only relevant for defining inputs.
💡 Hint: Recall the multifaceted role of the control word.
1 more question available
Challenge Problems
Push your limits with advanced challenges
How would you modify the assembly code to have Port A alternate its output between 0 and 55H for a given duration?
💡 Hint: Look at the previous examples of delays in assembly.
Create a detailed flowchart for initializing the 8255 and sending a static output to Port A.
💡 Hint: Use symbols for start/end, processes, and decisions to visually convey the flow.
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Reference links
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