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11753734
1.1-System Architecture
Descripción
GCSE Computing Mapa Mental sobre 1.1-System Architecture, creado por Shauna Smith el 13/12/2017.
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computing
gcse
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Shauna Smith
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Shauna Smith
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Resumen del Recurso
1.1-System Architecture
PROCESSOR
Has clock speed
number of cycles per second
measured in hertz
MHz-GHz
Brains of the computer system
Executes/carries out instructions
Has cores in which instructions are executed
Dual Core-Quad Core-8 Core
MAIN MEMORY
RAM-Random Access Memory
Holds data and instructions that are currently in use by the processor
Located on the motherboard
Directly accessible by the processor
All data/instructions are lost once power is turned off.
ROM-Read Only Memory
Instructions are permanently etched onto a ROM chip.
When power is turned off-instructions still remain on the ROM chip.
Bootstrap loader is held in ROM- gives the instructions to start up an operating system
SYSTEM BUSSES
A bus is set of parallel wires connecting two or more independent components of a computer system in order to pass signals between them.
The system is separated into 3 different busses
The data bus
The address bus
The control bus
Control signals are sent along the control bus
E.g. Memory Read, Memory Write
This instructs which data will be travelling to/from memory
Carries addresses from the processor to the main memory
It is one direction
The processor generates an address
All data/instructions are returned on the data bus
Carries data/instructions from the main memory to the processor.
Bi-Directional
Data can be read or written
SECONDARY STORAGE
Hard Disk Drive
Solid State Drive
Flash Memory
DVD-R
Blue-ray
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