1.1 System Architecture

1.1 System Architecture

1. Parts of a computer

   • Cpu
     • The brain of the computer. Executes instructions
   • Memory (RAM & ROM)
     • RAM stores programs you are using now and is volatile meaning if power is lost so is the data
     • ROM stores the computers operating system and is non-volatile so it can't get lost
   • GPU
     • Makes Graphics appear on the screen
   • Network Card
     • Allows your computer to connect to networks
   • Motherboard
     • Connects all the other components of a computer together

2. Vonn Neumann Architecture

   • Control Unit
     • Executes functions and operations
   • Arithmetic & Logic Unit
     • Logic Unit compares results and decides true or false
     • Arithmetic calculates operations
   • Accumulator
     • Remembers the answer to the last calculation
   • MDR & MAR
     • MDR stores data in the CPU
     • MAR stores the addresses where the data comes from

3. Embedded systems

   • These are machines with computers programmed to do a specific task
     • Ticket machine
     • Microwave
     • Cars

4. CPU & Fetch, Decode, Execute cycle