Computing (GCSE / AS LEVEL)

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CPU architecture
abdi12306
Flashcards by abdi12306, updated more than 1 year ago
abdi12306
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Question Answer
What is a CPU ? The CPU (Central Processing Unit) is the part of a computer system that is commonly referred to as the "brains" of a computer. The CPU is responsible for executing a sequence of stored instructions called a program. This program will take inputs from an input device, process the input in some way and output the results to an output device.
What does the CU (CONTROL UNIT) DO? The control unit deals with FETCHING data,DECODING & EXECUTING
WHAT DOES ALU DO? an arithmetic logic unit (ALU) is a digital circuit that performs arithmetic and logical operations.
what is RAM & ROM ROM is memory that cannot be changed by a program or user.RAM is a fast temporary type of memory in which programs, applications and data are stored.E.G. OS
What is MAR he MAR stores the physical memory address where the next piece of data will be written or the next instruction is located.
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