Computer systems

Computer systems

1. Rom

   • Read Only memory
   • Cannot be written to
   • Primary memory
     • /main
   • Non volatile
   • Tells the Cpu
     • Test memory system
     • Boot up computer
     • Check the hardware
     • Copy operating system to RAM

2. RAM

   • Volatile
   • Rapid
     • Load faster
   • Random access memory
   • Stores to digital memory once full

3. Storage

   • Choices
     • Durability
     • Portability
     • Capacity
     • Reliability
     • Speed
   • Magnetic Hard Disk
     • Traditional storage
     • 5400 and 15000 revolutions per minute
     • HDD
   • Solid State Drive
     • Flash Memory
     • No moving parts
       • Silent
     • Faster
     • More expencive and less Storage
     • SSD
   • Optical Disk
     • CD-700MB
     • DVD 4.7GB
     • Blu Rays 25GB
   • Exsample sizes
     • 1 word page 100KB
     • Small photo 6MB