Hardware

Hardware

1. Binary logic

   • High tolerence
     • Stops mistakes
   • Computer components
     • Use 0 & 1 (on & off)
   • Allows logic gates
     • And
     • Or
     • Not

2. Memory

   • Flash
     • USB
   • Cache
   • Virtual
   • RAM
     • Volatile
   • ROM
     • Boot system

3. Secondary storage

   • Solid state
     • USB
   • Optical
     • CD/DVD
   • Magnetic
     • HDL

4. CPU

   • Cache
     • High speed memory
   • Clock speed
     • Measured in GHXz
       • !000 million per second
   • ALU
     • Does math
   • IAS
     • Immediate access storage
       • Register
   • Control Unit
     • Receives instructions
       • From RAM & directs it
   • Fetch, decode, execute cycle
     • Fetches instructions from RAM
     • Works out what to do
     • Processes it
   • Cores
     • Dual/Quad core
       • Not twice as fast
     • Improves speed