Von Neumann

Von Neumann

1. Control Unit (CU)

   • Controls the flow of data between the CPU and the rest of the computer

2. Registers

   • Program counter
     • Stores the address of the next instruction to be run.
   • Accumulator
     • Stores the intermediate results of a calculation.
   • Current instruction register
     • Stores the instruction currently being executed
   • Memory address register (MAR)
     • Stores the memory address where the data or instruction will be fetched/written.
   • Memory data register
     • Stores the data or instruction which is being fetched/written from/to memory.

3. Arithmetic and logic unit

   • The ALU performs all the calculations for the CPU

4. Cache

   • Stores frequently used instructions for the CPU.