Addressing modes determine the method used within the program to access data either from the CPU or the main memory. Here are some of the most common addressing modes:

1. Immediate Addressing Mode: In this mode, the operand is specified in the instruction itself. For example, in the instruction 'MOV A, 05', '05' is the immediate operand.

2. Direct Addressing Mode: In this mode, the address of the operand is given directly in the instruction. For example, in the instruction 'MOV A, 2000', '2000' is the direct address of the operand.

3. Indirect Addressing Mode: In this mode, the instruction specifies a memory location which contains the address of the operand. For example, in the instruction 'MOV A, [2000]', '2000' is the memory location that holds the address of the operand.

4. Register Addressing Mode: In this mode, the operand is the contents of a processor register. The name of the register is given in the instruction. For example, in the instruction 'MOV A, B', 'B' is the register containing the operand.

5. Register Indirect Addressing Mode: In this mode, the instruction specifies a register which contains the address of the operand. For example, in the instruction 'MOV A, [B]', 'B' is the register that holds the address of the operand.

6. Indexed Addressing Mode: In this mode, the final address of the operand is computed by adding the contents of the index register to the address part of the instruction. For example, in the instruction 'MOV A, 2000(X)', '2000' is the base address and 'X' is the index register.

7. Base Register Addressing Mode: In this mode, the address of the operand is obtained by adding the contents of the base register to the address part of the instruction. For example, in the instruction 'MOV A, 2000(B)', '2000' is the base address and 'B' is the base register.

8. Relative Addressing Mode: In this mode, the effective address of the operand is generated by adding the address part of the instruction to the contents of a program counter. For example, in the instruction 'JMP 200', '200' is the relative address.

Each of these addressing modes has its own advantages and disadvantages, and the choice of which to use depends on the specific requirements of the program.

Question

Addressing modes determine the method used within the program to access data either from the CPU or the main memory. Here are some of the most common addressing modes:

1. Immediate Addressing Mode: In this mode, the operand is specified in the instruction itself. For example, in the instruction 'MOV A, 05', '05' is the immediate operand.

2. Direct Addressing Mode: In this mode, the address of the operand is given directly in the instruction. For example, in the instruction 'MOV A, 2000', '2000' is the direct address of the operand.

3. Indirect Addressing Mode: In this mode, the instruction specifies a memory location which contains the address of the operand. For example, in the instruction 'MOV A, [2000]', '2000' is the memory location that holds the address of the operand.

4. Register Addressing Mode: In this mode, the operand is the contents of a processor register. The name of the register is given in the instruction. For example, in the instruction 'MOV A, B', 'B' is the register containing the operand.

5. Register Indirect Addressing Mode: In this mode, the instruction specifies a register which contains the address of the operand. For example, in the instruction 'MOV A, [B]', 'B' is the register that holds the address of the operand.

6. Indexed Addressing Mode: In this mode, the final address of the operand is computed by adding the contents of the index register to the address part of the instruction. For example, in the instruction 'MOV A, 2000(X)', '2000' is the base address and 'X' is the index register.

7. Base Register Addressing Mode: In this mode, the address of the operand is obtained by adding the contents of the base register to the address part of the instruction. For example, in the instruction 'MOV A, 2000(B)', '2000' is the base address and 'B' is the base register.

8. Relative Addressing Mode: In this mode, the effective address of the operand is generated by adding the address part of the instruction to the contents of a program counter. For example, in the instruction 'JMP 200', '200' is the relative address.

Each of these addressing modes has its own advantages and disadvantages, and the choice of which to use depends on the specific requirements of the program.

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