Computer Architecture

Overview

von Neumann architecture

1. An electronic digital computer with these components:

   • Processor unit: arithmetic unit and processor registers
   • control unit: instruction register(IR) and program counter(PC)
   • Memeory
   • External mass storage
   • Input and Output mechanisms

2. Instructions and data are stored in memory with equal status.

3. Instructions is composed of Opcode and ddress code, the address code is used to point Operand.

The term “von Neumann architecture” has evolved to refer to any stored-program computer in which an instruction fetch and a data operation cannot occur at the same time (since they share a common bus)