Computer Science Illuminated
Computer Science Illuminated
7th Edition
ISBN: 9781284155617
Author: Nell Dale, John Lewis
Publisher: Jones & Bartlett Learning
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Chapter 6, Problem 29E

Explanation of Solution

Difference between an Instruction Register (IR) and Program Counter (PC):

Instruction Register (IR)

Program Counter (PC)
The IR refers to a special register that is used in Central Processing Units (CPUs) control unit.The PC refers to a special register that is used in Central Processing Units (CPUs) control unit.
It holds the copy of the instruction which is currently being executed.It consists of the address of the next instruction which has to be executed.
It is a temporary memory register that is used to simply store the instruction while executionAfter executing the instruction in the IR, the control will be moved to execute the instruction in the Program Counter...

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