Index register in a digital computer is used for

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Question

Index register in a digital computer is used for

Vivek Kumar · Accepted Answer

address modification. Explanation: In computer architecture, an Index Register is a processor register used specifically for modifying operand addresses during the execution of a program. Address Modification: The primary function of an index register is to hold a numerical value that is added to (or subtracted from) the address part of an instruction to determine the effective address of the operand. This is known as Indexed Addressing . Effective Address Calculation: The formula used is typically . Common Usage: It is extensively used for accessing elements within arrays or tables. By changing the value in the index register, the same instruction can access different memory locations in a sequence.

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