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Instruction Cycle 1

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Question

An instruction is stored in memory at address 300, with it's address field at address 301. The address field contains value 400. If the instruction is a branch instruction, which uses PC- relative mode for target address. Then the decimal value of target address is _________ . (All numbers are in decimal)

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Solution

option (b)

Given scenario

While calculating target address (effective address) for current instruction, value of program counter (PC) = 302

In PC-relative mode,

Target address = PC- value + address field value of instruction

= 302 + 400

= 702

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