Practice - Direct Addressing Mode Example
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Practice Questions
Test your understanding with targeted questions
What is the value in R1 if R1 + 1 accesses memory location 2 initially?
💡 Hint: Consider how registers are indexed starting from 1.
If R5 is initialized to 0, what will it be after adding the value at memory[2]?
💡 Hint: Think about what value was stored in memory[2].
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Interactive Quizzes
Quick quizzes to reinforce your learning
In direct addressing mode, how is memory accessed?
💡 Hint: Remember how registers directly point to memory locations.
True or False: The effective address is always calculated by subtracting register values.
💡 Hint: Review the examples of address calculation.
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Challenge Problems
Push your limits with advanced challenges
You have an array starting at memory location 100H with values 1, 3, 5, and 7. If R1 is 2, what value will be added to R5 when executed with R5 += array[R1 + 1]?
💡 Hint: Calculate the effective memory location first.
If a CPU operates with 8-bit data sizes, how many instructions could effectively fit in a 16-bit addressing space when split into two words?
💡 Hint: Count how many 8-bit segments fit into 16-bits.
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Reference links
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