Hardware

Hardware

1. Binary logic

   • computer components use 0 and 1 (on and off)
   • high tolerance very difficult for errors to occur
   • AND OR NOT GATES LOGIC GATES

2. Memory

   • Cache memory can be accessed faster than ram memory.
   • virtual memory acts like extra memory by sending it to secondary memory
   • R.A.M Random Access Memory is volatile
     • R.O.M read only memory boot sequence
   • flash memory like a usb

3. number of cores

   • can be dual core quad core or oct core
   • more cores improves speed but the computer does not become twice as fast

4. fetch decode execute cycle

   • fetch gets instructions as data from the ram
   • decode works out what to do
     • execute process it

5. cpu

   • ALU: arithmetic logic unit
     • performs calculations
   • immediate access store
     • registers
   • control unit
     • receives instructions from RAM and directs it
   • clock speed
     • measured in GHZ
       • 1000 million per second
   • cache
     • high speed memory
   • secondary storage
     • solid state like usb
     • optical like a dvd cd
     • magnetic