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Module 2: x86 Architecture, CPU Control, I/O, Memory System Design

20242m

__________________ Addressing mode directly specifies the operand within the instruction.
i. Direct addressing
ii. Indirect addressing
iii. Immediate addressing
iv. Indexed addressing

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Answer: iii. Immediate addressing

Explanation:

  • Immediate addressing: Operand value itself is encoded within instruction (e.g., MOV AX, 5, ADD #5,R1). No memory access needed.
  • Direct addressing: Instruction holds address of operand in memory.
  • Indirect addressing: Instruction holds address of address.
  • Indexed addressing: Address = base + index register.

Hence directly specifies operand = Immediate.

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