System Architecture

System Architecture

1. program counter

   • stores the location of the next instruction to be fetched
   • memory adress register
     • stores the location for data to be fetched or sent to memory
   • memory data register
     • stores data fetched from or waiting to be sent to memory
   • accumalator
     • stores the outcome of the calculation done by the alu
   • current instruction register
     • stores the data ready to be decoded by the ALU
   • arithmatic logical unit
     • control unit
       • control the data flow within the system
     • cache
       • small temporary memory stores frequently used instructions quicker for cpu to access amin memory
       • alu
         • part of cpu that carrys out calculations logic and arithmatic
         • cpu has a fetch dedcode execute cycle
     • ram
       • volatile memory stores data and applications currently in use
   • ram is volatile rom is non volatile
     • ram stores apps and gets deleted after shutoff
       • rom stores boot up instructions and is non volatile

2. virtual storage

   • cloud storage etc

3. upgrade cpu by upgrading cache and adding more cores