Computer science hardware

Computer science hardware

1. CPU

   • Fetch
     • Decode
       • Execute
     • the instructions from memory
   • It tells the computer to process a specific piece of data

2. Binary Logic

   • A series of 0 and 1 indicating if something is true or false.
   • Logic Gates
     • It produces the opposite output to what was input.
     • The operation acts upon two inputs, were both have to be true to otherwise it is false.
     • The operation needs at least two inputs to produce a single output.

3. Memory

   • Hard drive (Storage) 40 GB - On Average
     • Okay when off.
     • Virtual memory
     • Contains all downloaded
   • RAM (Random Access Memory) 256 MB Per stick of RAM
     • Internet Browser
     • Music Software
     • Music File
     • Operating System
   • Rom (Read only Memory) 2MB
     • Volatile
     • Can't be took out of the computer
     • BIOS - (Basic Input Output System) Boot Program
       • Instructs the computer to turn on
       • Finds and loads the operating system

4. secondary storage

   • Solid state
     • External hard drive
     • USB
     • SD Card
   • magnetic
     • Floppy Disk
     • Magnetic Tape
   • Optical
     • CD
     • DVD

5. Specialist Devices

   • Brail Keyboard
   • Infrared eye motion sensor
   • Foot mouse
   • Speakers

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