von neumann architecture

von neumann architecture

1. 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 (MDR)
     • Stores the data or instruction which is being fetched/written from/to memory.

2. control unit

   • It controls the flow of data between the CPU and other parts of the computer system.

3. Arithmetic logic unit

   • Stores frequently used instructions for the CPU.

4. Cache

   • Stores frequently used instructions for the CPU.