Computer Architecture: Von Neumann Model
43 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary purpose of the read cycle in relation to the CPU and memory?

  • To carry data from memory to the CPU (correct)
  • To manage control signals in the bus
  • To initiate data retrieval from input devices
  • To send data from the CPU to memory
  • Which statement accurately describes asynchronous timing?

  • Data transmission happens in uninterrupted continuous cycles.
  • Events occur simultaneously without any dependency on previous events.
  • Events depend on the completion of previous events for synchronization. (correct)
  • The occurrence of events relies on a regular clock signal.
  • In the context of the PCI bus, what is the function of the bus arbiter?

  • To initiate read and write operations on the bus
  • To maintain the clock signal for synchronous operations
  • To perform error checking during data transmission
  • To manage and grant control of the bus to requesting devices (correct)
  • Which lines are necessary for the PCI to operate efficiently?

    <p>System lines, address and data lines, control interface, and error lines (C)</p> Signup and view all the answers

    During the write phase in asynchronous timing, what is sent to confirm successful data storage?

    <p>An acknowledgement signal (A)</p> Signup and view all the answers

    What is the first step in the instruction cycle?

    <p>Instruction Address Calculation (B)</p> Signup and view all the answers

    After the first instruction is executed, what does the PC contain?

    <p>301 (C)</p> Signup and view all the answers

    Which of the following is NOT a state in the instruction cycle?

    <p>Data Transfer (B)</p> Signup and view all the answers

    What is the primary purpose of the Memory Address Register (MAR)?

    <p>To store the address of the data to be used by the Memory Buffer Register (MBR) (D)</p> Signup and view all the answers

    Which of the following accurately describes the instruction cycle?

    <p>It includes both fetching and executing instructions. (C)</p> Signup and view all the answers

    What does the IR initially contain in the second step of the instruction cycle?

    <p>1940 (D)</p> Signup and view all the answers

    In the fetch cycle, what role does the Program Counter (PC) play?

    <p>It specifies the next instruction's location to be fetched. (D)</p> Signup and view all the answers

    Why are interrupts used in processors?

    <p>To prevent idle time during slow input/output operations. (D)</p> Signup and view all the answers

    What does the AC store after the fourth step of the instruction cycle?

    <p>The result of the most recent data operation. (D)</p> Signup and view all the answers

    What are the four categories of instructions executed by the processor?

    <p>Processor-memory, Processor-I/O, data processing, control (D)</p> Signup and view all the answers

    Which of these processes follows the Operand Fetch step?

    <p>Data Operation (B)</p> Signup and view all the answers

    How does the CPU interact with I/O devices according to the Von Neumann architecture?

    <p>By utilizing the I/O address and I/O buffer registers. (D)</p> Signup and view all the answers

    What is the effect of the processor setting the program counter to a new address during execution?

    <p>It begins fetching the next instruction from that new address. (B)</p> Signup and view all the answers

    What information does the PC have after the sixth step when the AC value is stored?

    <p>302 (D)</p> Signup and view all the answers

    What does the operand address calculation determine?

    <p>The address of the operands if needed. (C)</p> Signup and view all the answers

    What is the significance of storing data and instructions in a single memory according to the Von Neumann architecture?

    <p>It simplifies the hardware design and execution process. (B)</p> Signup and view all the answers

    In a program adding contents of addresses 940 and 941, where will the result be displayed?

    <p>In address 941 (C)</p> Signup and view all the answers

    Which component is primarily responsible for executing an instruction?

    <p>Arithmetic Logic Unit (B)</p> Signup and view all the answers

    What type of interrupt is caused by a failure?

    <p>Hardware failure interrupt (C)</p> Signup and view all the answers

    Which section is NOT part of an I/O program's structure?

    <p>Generating an interrupt request (A)</p> Signup and view all the answers

    What happens when an I/O command is executed?

    <p>Control returns to the user program only after I/O completion. (B)</p> Signup and view all the answers

    How can multiple interrupts be managed effectively?

    <p>By defining interrupt priorities. (A)</p> Signup and view all the answers

    Which of the following best describes a timer interrupt?

    <p>Triggered by the processor’s clock to manage time-related tasks. (D)</p> Signup and view all the answers

    What is the primary purpose of interrupts in a processor?

    <p>To manage multiple processing tasks simultaneously without delays. (D)</p> Signup and view all the answers

    What occurs at the end of an interrupt handling routine?

    <p>The processor continues the interrupted program. (D)</p> Signup and view all the answers

    What are the main components of a computer system?

    <p>Processor, memory, I/O (D)</p> Signup and view all the answers

    What occurs in the information cycle after executing instructions?

    <p>The processor checks for pending interrupts. (B)</p> Signup and view all the answers

    What does the processor do if an interrupt request signal is detected?

    <p>It suspends the current operation and handles the interrupt. (C)</p> Signup and view all the answers

    What is the primary function of data lines in a bus system?

    <p>To carry data among the system modules (D)</p> Signup and view all the answers

    How is memory capacity determined in a bus system?

    <p>By the width of the address bus (B)</p> Signup and view all the answers

    What characterizes a multiplexed bus?

    <p>It shares lines between data and address functions (C)</p> Signup and view all the answers

    What role does bus arbitration play in a bus system?

    <p>It determines which module gets control of the bus (C)</p> Signup and view all the answers

    Which type of timing uses clock signals for synchronization of events?

    <p>Synchronous timing (C)</p> Signup and view all the answers

    Which type of bus features both dedicated data and address lines?

    <p>Dedicated bus (C)</p> Signup and view all the answers

    What kind of devices does the I/O module control?

    <p>External devices with unique ports (D)</p> Signup and view all the answers

    What is a possible consequence of connecting many devices onto one bus?

    <p>Propagation delay (C)</p> Signup and view all the answers

    What is the main purpose of control lines in a bus system?

    <p>To manage control and timing of information (D)</p> Signup and view all the answers

    What describes a centralized arbitration system?

    <p>A single device governs which module gets access (D)</p> Signup and view all the answers

    Flashcards

    Von Neumann Architecture

    A computer architecture where data and instructions are stored in the same memory.

    Instruction Cycle

    The steps involved in processing a single instruction.

    Fetch Cycle

    The part of the instruction cycle where the instruction is retrieved from memory.

    MAR (Memory Address Register)

    A register that holds the memory address of the data being accessed.

    Signup and view all the flashcards

    MBR (Memory Buffer Register)

    A register that holds the data being read from or written to memory.

    Signup and view all the flashcards

    Processor-Memory

    Data transfer between CPU and primary memory.

    Signup and view all the flashcards

    Program Counter (PC)

    A register that holds the memory address of the next instruction to be executed.

    Signup and view all the flashcards

    Hexadecimal Notation

    A base-16 number system used to represent memory addresses and register contents.

    Signup and view all the flashcards

    Instruction Cycle States

    A series of steps a processor follows to execute an instruction, including calculating the address, fetching the instruction, decoding it, calculating operand addresses, fetching operands, performing the operation, and storing the result.

    Signup and view all the flashcards

    Instruction Address Calculation

    Determines the memory address of the next instruction to be executed.

    Signup and view all the flashcards

    Instruction Fetch

    Retrieving the instruction from memory.

    Signup and view all the flashcards

    Instruction Operation Decoding

    Analyzing the instruction to understand the operation and operands needed.

    Signup and view all the flashcards

    Operand Address Calculation

    Finding the memory addresses of the data (operands) used in an operation.

    Signup and view all the flashcards

    Operand Fetch

    Retrieving the operands from memory or I/O devices.

    Signup and view all the flashcards

    Data Operation

    Performing the actual calculation or operation specified by the instruction.

    Signup and view all the flashcards

    Operand Store

    Writing the result of an operation back into memory or to an I/O device.

    Signup and view all the flashcards

    Interrupts

    Mechanisms that allow other devices to temporarily pause the processor's normal execution for urgent tasks.

    Signup and view all the flashcards

    Interrupt Types

    Interrupts are categorized into Program, Timer, I/O, and Hardware Failure.

    Signup and view all the flashcards

    I/O Programs

    System utilities that manage Input/Output (I/O) operations.

    Signup and view all the flashcards

    Interrupt Handling

    The process of stopping a program and handling an interrupt.

    Signup and view all the flashcards

    Interrupt Priority

    A system for handling multiple interrupts by assigning different levels of importance.

    Signup and view all the flashcards

    Interrupt Cycle

    Processor checking for pending interrupts after each fetch and execute cycle.

    Signup and view all the flashcards

    Interrupt Handler

    A special routine that handles the interrupt.

    Signup and view all the flashcards

    Interrupt Processing (Disabling)

    Temporarily stopping other interrupts while processing an interrupt.

    Signup and view all the flashcards

    I/O Modules

    Devices that facilitate data exchange between the processor and external devices.

    Signup and view all the flashcards

    Computer Components

    The fundamental parts of a computer: processor, memory, I/O devices.

    Signup and view all the flashcards

    Interconnection Structure

    The pathways and connections that link components in a computer system.

    Signup and view all the flashcards

    Synchronous Timing

    Events happen at fixed intervals defined by a clock signal. Like a metronome, everything happens in step with the beat.

    Signup and view all the flashcards

    Asynchronous Timing

    Events are triggered by the completion of the previous event, not a clock signal. Events wait for each other to finish, like a relay race.

    Signup and view all the flashcards

    Read Cycle

    Data is transferred from memory to the CPU.

    Signup and view all the flashcards

    Write Cycle

    Data is transferred from the CPU to memory.

    Signup and view all the flashcards

    PCI Bus

    A high-speed bus connecting hardware devices within a computer. It's like a highway for information.

    Signup and view all the flashcards

    Memory Module

    A component that stores data and instructions. It's organized into words, each with a unique address. Data can be read from or written to the memory based on the address.

    Signup and view all the flashcards

    Processor

    The brain of the computer system. It executes instructions, processes data, controls system operations, and receives interrupt signals.

    Signup and view all the flashcards

    System Bus

    A communication pathway that connects the processor, memory, and I/O modules together. It carries data, addresses, and control signals.

    Signup and view all the flashcards

    Data Lines

    Lines on the bus that carry the actual data being transferred between devices. These lines form the data bus.

    Signup and view all the flashcards

    Address Lines

    Lines on the bus that specify the source and destination of the data. These lines form the address bus.

    Signup and view all the flashcards

    Control Lines

    Lines on the bus that control and synchronize data transfer. They include signals like read/write, interrupt requests, and clock signals.

    Signup and view all the flashcards

    Dedicated Bus

    A bus where data and address lines are separate. This offers higher performance but uses more lines.

    Signup and view all the flashcards

    Multiplexed Bus

    A bus where data and address lines share the same physical lines. This saves space but reduces performance.

    Signup and view all the flashcards

    Bus Arbitration

    The process that determines which device gets access to the bus at any given time.

    Signup and view all the flashcards

    Study Notes

    Von Neumann Architecture

    • Data and instructions are stored in a single read/write memory
    • Memory locations are addressed by their position
    • Executions occur sequentially
    • A program is a sequence of operations, each requiring distinct control signals

    CPU Components

    • Program Counter (PC): Holds the address of the next instruction
    • Instruction Register (IR): Holds the current instruction
    • Memory Address Register (MAR): Holds the address of the data to be accessed in memory
    • Memory Buffer Register (MBR): Holds the data to be written to or read from memory
    • Input/Output Address Register (I/O AR): Specifies a particular I/O device
    • Input/Output Buffer Register (I/O BR): Used for I/O module-CPU data transfer

    CPU-Memory Data Exchange

    • Uses MAR and MBR for data exchange.
    • MAR stores the address of data to be used by MBR
    • MBR stores data to be written to/read from memory.

    I/O Modules

    • Facilitates communication with external devices
    • Located at specific addresses in memory
    • Use I/O AR and I/O BR to transfer data with the CPU

    Memory Modules

    • Memory locations are numbered
    • Contains data at these locations.

    Instruction Cycle

    • Fetch cycle: fetches the next instruction from memory.
    • Execute cycle: executes the fetched instruction.

    Instruction Cycle Breakdown

    • Processor-memory: data transfer between the CPU and main memory
    • Processor-I/O: data transfer between the CPU and I/O modules
    • Data processing: performing arithmetic or logical operations on data
    • Control: altering the sequence of execution

    Interrupt Mechanism

    • Mechanism for external devices to interrupt CPU processing
    • Allows higher efficiency when external devices are slower
    • Types of interrupts:
      • Program: caused by an instruction execution
      • Timer: caused by processor timer
      • I/O: caused by an I/O controller
      • Hardware failure: caused by a hardware error

    I/O Programs

    • System utilities for I/O operations
    • Prepare, carry out, and complete operations
    • Contain sequences of instructions for each operation
    • Interrupts enable timely I/O operations

    Interrupts and Processing

    • Interrupts enable I/O or other tasks to occur while current task is on hold
    • Priorities can be managed during interrupt execution

    Bus Structure

    • Communication pathway for connecting multiple devices.
    • Data lines transfer data
    • Address lines specify memory locations or I/O devices
    • Control lines manage communication
    • Types of buses include dedicated and multiplexed lines
    • Timing: asynchronous or synchronous

    Bus Timing

    • Synchronous: Uses clock signals to coordinate events
    • Asynchronous: Timing is events-based; completion notifies next action

    PCI Bus

    • Peripheral component interconnect bus
    • Connects hardware devices to the computer system.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    Von Neumann Architecture PDF

    Description

    This quiz covers the fundamentals of the Von Neumann architecture, including CPU components like the Program Counter and Memory Buffer Register. It explores how the CPU interacts with memory and I/O modules for efficient data exchange. Test your knowledge of how data and instructions are managed within a computer system.

    More Like This

    Von-Neumann Model and CPU Components Quiz
    5 questions
    Von Neumann Architecture Overview
    11 questions
    Von Neumann Model and CPU Components
    16 questions
    Use Quizgecko on...
    Browser
    Browser