Question

Define addressing modes? Explain various type of addressing modes in details

Answer 1

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➡ADDRESSING MODES

• Addressing modes are an aspect of the instruction set architecture in most central processing unit (CPU) designs.

• 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.

➡VARIOUS TYPES OF ADDRESSING MODES

1. IMMEDIATE

✍With immediate addressing mode, the actual data to be used as the operand is included in the instruction itself.

2. DIRECT ADDRESSING

✍When using direct addressing mode, the address of the operand is specified in the instruction. The processor will retrieve the data directly from the address specified in the instruction.

3. REGISTER ADDRESSSING

✍Register addressing mode indicates the operand data is stored in the register itself, so the instruction contains the address of the register. The data would be retrieved from the register.

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Answer 2

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ADDRESSING MODES

Addressing modes are an aspect of the instruction set architecture in most central processing unit (CPU) designs.

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.

➡VARIOUS TYPES OF ADDRESSING MODES

IMMEDIATE

✍With immediate addressing mode, the actual data to be used as the operand is included in the instruction itself.

2. DIRECT ADDRESSING

✍When using direct addressing mode, the address of the operand is specified in the instruction. The processor will retrieve the data directly from the address specified in the instruction.

3. REGISTER ADDRESSSING

✍Register addressing mode indicates the operand data is stored in the register itself, so the instruction contains the address of the register. The data would be retrieved from the register.