questions on addressing modes


  • What problem do addressing modes solve?

    An addressing mode specifies how to calculate the effective memory address of an operand by using information held in registers and/or constants contained within a machine instruction or elsewhere.
  • What are the most useful addressing modes?

    11–1 Register addressing mode is the most efficient addressing mode because the operands are in the processor itself (there is no need to access memory). 11–2 Immediate addressing mode can be used to specify constants; thus, it cannot be used to specify the destination operand of an instruction.
  • Which addressing mode is most suitable to change?

    Explanation: The relative addressing mode is used for this since it directly updates the PC.
  • The addressing modes help us specify the way in which an operand's effective address is represented in any given instruction. Some addressing modes allow referring to a large range of areas efficiently, like some linear array of addresses along with a list of addresses.
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