Practice Memory And Instruction Size (31.2.1) - Introduction to Addressing Modes

Practice: Memory and Instruction Size

Lesson 31.2.1Introduction to Addressing Modes

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8 questions

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6 sample questions

Question 1.
What is an effective address?
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Think of it as the location related to an operand.
Question 2.
What does the opcode represent in an instruction?
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Look for what action is described in an instruction.
3Question 3.
What does an opcode do?
- Specifies a memory address
- Controls CPU execution
- Represents data
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Refer to the term that describes actions in instructions.
4Question 4.
True or False: Indirect addressing mode refers to an address which directly specifies the operand.
- True
- False
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Think about the difference between pointing and specifying.
Question 5.
Explain how instruction fetching varies based on instruction size and type, using an example of an instruction that requires multiple memory accesses.
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Consider how varying sizes affect processing flows.
Question 6.
Given an array and a reset register, calculate what values R5 would hold after accessing multiple elements using index addressing mode.
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Remember to increment R1 carefully for each new access.

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