Systems architecture

Systems architecture

Von Neumann architecture: with the very computers it was not possible to store programs. Von Neumann developed the concept of the stored program computer:

• the program is stored in main memory and instructions are fetched and executed sequentially
• there is a single memory (and bus system) for accessing both data and programs

Components of the CPU (the Central Processing Unit is the brains of the computer that processes program instructions)

Control Unit

• fetches, decodes and executes instructions
• issues control signals that control hardware
• moves data around the system
• regulates and controls processor timing 

Arithmetic Logic Unit (ALU)

• performs arithmetic and logical…