Flashcards
Central processing unit
Cards in this deck (4)
- 1What is the CPUThe CPU(central processing unit)is often referred to as the brain of the computer
its main role is to process programs and data it does this by repeatedly fetching an instruction from memory and executing it(fetch-execute cycle.) - 2What is the role of the Control Unit-Decides which instruction to carry out next
-Fetches it from memory
-Decodes the instruction and executes9or obeys) the instruction
-Repeats the process(fetch-execute cycle) - 3What is the role of the Arithmetic Logic Unit (ALU)-Carries out arithmetic calculations, e.g. addition, multiplication, subtraction, division
Preforms logical comparisons to assist
with decision-making by using the operators AND, OR and NOT - 4What is the role of the Immediate access store (IAS)-Stores all programs and data temporarily while they are in use
-During the fetch-execute cycle, instructions are fetched from their specific storage location in the IAS using an address
-Each memory location has a unique address assigned to it.
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- GCSE Computing (Computer Hardware) Flashcards on Central processing unit, created by Abbie Welch on 29/04/2019.
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- Abbie Welch
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