system architecture

system architecture

1. CPU

   • performance
     • cores
       • where data is processed
       • more instructions processed at the same time
     • cache
       • frequently used instructions
       • fast access in CPU
     • clockspeed
       • amount of cycles per second
       • faster clock speed more cycles completed
   • fetch, decode, execute instructions

2. ALU

   • arithmetic logic unit
     • responsible for calculations

3. CU

   • control unit
     • controls flow data

4. registers

   • MAR
     • memory address register
       • holds the address of the current instruction
   • MDR
     • memory data register
       • data fetched from memory
   • ACC
     • accumulator
       • result from ALU
   • Program counter
     • PC
       • holds address of next instruction to be processed
   • high speed memory in CPU

5. Von Neumann architecture

   • data and program instructions
     • stored in computers memory in same place