computing may 2014

computing may 2014

1. storage devices

   • solid state storage
     • no moving parts
     • stored electronically
     • portable and durable
   • magnetic
     • moving parts
     • patterned magnetisiation
     • tape recorder, hard drive
   • optical
     • moving parts
     • uses a laser to read data
       • CD's and DVD's

2. memory storage

   • RAM
     • volitile
     • random access memory
   • ROM
     • volatile memory
     • Read only memory
   • CACHE
     • volitile
     • fastest volatile memory
   • virtual memory
     • hard drve splits off to make RAM because the actual RAM is full
     • temporary

3. FDE

   • Fetch
     • cpu collects some data instructions using the address bus and It travels down the data bus
       • Decode
         • makes sense of instructions
           • execute
             • executes comand

4. outputs

   • printer
   • voice synthesiser
   • screen reader

5. inputs

   • web cam
   • voice input
   • foot mouse