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Unit 1: (Input devcies: (Pointing Devices - Mouse and Trackerball,…
Unit 1:
Input devcies:
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TouchScreens - Tablets ,Watches and Mobile Phones
Manual Input devices - All input devices transfer data from the source in the outside world to the computer
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Cpu Components:
Control Unit
Part of Processor that coordinates the activity of all other components - Control signals are sent along the control bus between the control unit and the other components of the computer
Alu
Performs arithmetic , logical and shift operations on data
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Types of Processes:
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Harvard Architecture
An Alternative model Separates the data and instructions into separate memories using different buses
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Uses:
Used for Specialist embedded systems and digital signal processing where speed takes priority over the complexities of the design
Storage Devices
Types of Memory
Ram
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Can contain OS , Software currently in use and Data which software is currently using
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Rom
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Data needs permanently held in memory , even when a computer has no power