Introduction to Modern Computer Architecture Modern computer architecture is the foundation that powers our digital world. It encompasses the integrated components, design principles, and underlying technologies that enable the seamless operation of computers and computing devices.
Components of a Computer System Processor The central processing unit (CPU) is the brain of the computer, responsible for executing instructions and performing calculations. Memory Computer memory, including RAM and storage, provides temporary and permanent data storage for the system. Input/Output Devices like keyboards, mice, and displays allow users to interact with the computer and exchange information.
Von Neumann Architecture 1 Fetch The processor fetches instructions from memory. 2 Decode The processor decodes the instructions to determine what operations to perform. 3 Execute The processor executes the instructions, performing calculations and manipulating data.
Processor and Memory Organization CPU Registers Processor registers store data and addresses for rapid access by the CPU. Cache Memory Cache memory acts as a high-speed buffer between the processor and main memory, reducing access times. Main Memory RAM provides the primary storage for programs and data that the CPU can directly access. Secondary Storage Hard drives, SSDs, and other storage devices provide long-term, non-volatile storage for files and data.
Input/Output Devices and Interfaces Keyboard The primary input device for text entry and command input. Mouse The standard pointing device for navigating and interacting with the graphical user interface. Display The main output device for visual information, ranging from traditional monitors to modern displays. Printer Output device that creates physical copies of digital documents and images.