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What is indirect addressing with example?

What is indirect addressing with example?

Indirect addressing is a scheme in which the address specifies which memory word or register contains not the operand but the address of the operand. For example: 1) LOAD R1, @100 Load the content of memory address stored at memory address 100 to the register R1.

What are direct and indirect addressing?

Basic Concept. The direct addressing mode contains the concerned operand in the instruction code’s address field. In the case of an indirect addressing mode, the operand’s address stays in the address field of any instruction. Total number of Memory References. It requires no memory references for accessing the data.

Why is indirect addressing used?

Indirect addressing may be used for code or data. It can make implementation of pointers, references, or handles much easier, and can also make it easier to call subroutines which are not otherwise addressable. Indirect addressing does carry a performance penalty due to the extra memory access involved.

What is direct and indirect addressing?

The direct addressing mode contains the concerned operand in the instruction code’s address field. In the case of an indirect addressing mode, the operand’s address stays in the address field of any instruction. Total number of Memory References. It requires no memory references for accessing the data.

What is the limitation of register indirect addressing mode?

The R0 and R1 are the only registers that can be used for pointers in register indirect addressing mode. R0 and R1 are 8 bits wide only. The limitations to accessing any information in the internal RAM memory of 30H to 7FH or special function registers only.

What is the purpose of indirect addressing?

indirect addressing A method of addressing in which the contents of the address specified in the instruction (which may itself be an effective address) are themselves an address to be used to provide the desired memory reference. Two memory references are thus needed to obtain the data.

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