Hardware

Hardware

1. CPU

   • ALU
     • Does the maths
   • Immediate access store
     • Register
   • Control unit
     • receives instructions from RAM and directs
   • fetch,decode,execute cycle
     • fetch instructions/data from RAM
     • Work out what to do
     • process it
   • number of cores
     • not twice as fast
     • does improve speed
     • dual/quad
   • Clock speed
     • Measured in ghz
       • 1000 million per second
   • Cache
     • High-speed memory
       • more is faster

2. Binary logic

   • allows use of logic gate
     • AND
     • OR
     • NOT
   • Computer components use 0 and 1(on and off)
   • High tolarence
     • stops mistakes

3. Secondary storage

   • Solid-state
     • Like USB
   • optical
     • CD/DVD
   • magnetic
     • HDL

4. Memory

   • Flask
     • USB
   • Cashe
   • Virtual
   • RAM
     • Volatile
   • ROM
     • Boot sequence

5. Users with special needs

   • Speech recognition
   • Eye typer
   • Braille keyboard