Basic Computer Organization
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Questions and Answers

What does a byte consist of in terms of bits?

  • 32 bits
  • 16 bits
  • 4 bits
  • 8 bits (correct)
  • How many bits are in a word according to the given definitions?

  • 64 bits
  • 32 bits
  • 16 bits (correct)
  • 8 bits
  • What is the maximum number of address lines required for addressing memory if there are 16 data input lines?

  • 8 address lines (correct)
  • 16 address lines
  • 32 address lines
  • 4 address lines
  • What operation does the Read control line facilitate in memory?

    <p>Retrieving data from memory</p> Signup and view all the answers

    Which of the following best describes how memory references are specified?

    <p>By indexing memory references</p> Signup and view all the answers

    What does computer organization primarily describe?

    <p>The functions and design of digital computer units</p> Signup and view all the answers

    Which component of a computer is responsible for processing data?

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

    What does a bus in computer architecture do?

    <p>Transfers data between computer components</p> Signup and view all the answers

    How are simple digital systems created according to the text?

    <p>Using combinational and sequential circuits</p> Signup and view all the answers

    What role do buffer registers play in a bus structure?

    <p>Hold data temporarily during transfer</p> Signup and view all the answers

    What is a significant characteristic of large digital systems compared to smaller ones?

    <p>Their state tables can be excessively large</p> Signup and view all the answers

    What is the modular approach mentioned in the discussion of digital systems?

    <p>Designing each subsystem to perform a different task</p> Signup and view all the answers

    What is considered the low-level building block of a digital computer?

    <p>Combinational circuits</p> Signup and view all the answers

    What is a microoperation?

    <p>An elementary operation performed on data in registers</p> Signup and view all the answers

    Which of the following operations is NOT an example of a microoperation?

    <p>Calculate</p> Signup and view all the answers

    Which of the following best characterizes digital modules?

    <p>The Registers they contain and the operations they perform</p> Signup and view all the answers

    What happens to the result of a microoperation?

    <p>It may replace or transfer the binary information of a register</p> Signup and view all the answers

    Which instruction is used to clear the accumulator (AC)?

    <p>CLA</p> Signup and view all the answers

    In a typical microoperation, how is data processed?

    <p>In parallel during one clock pulse period</p> Signup and view all the answers

    What is the purpose of the STA instruction?

    <p>Store the contents of the accumulator into memory</p> Signup and view all the answers

    What operation is represented by the hex code 7200?

    <p>Complement AC</p> Signup and view all the answers

    Which type of operation is NOT executed on the registers?

    <p>Skip</p> Signup and view all the answers

    Which of the following statements about microoperations is true?

    <p>They involve manipulation of data in registers</p> Signup and view all the answers

    What does the instruction HLT do in the context of a computer's operation?

    <p>It halts the computer's operations.</p> Signup and view all the answers

    Which instruction is specifically associated with input operations?

    <p>INP</p> Signup and view all the answers

    What occurs during the Fetch Cycle in a computer's operation?

    <p>Instructions or data are requested from RAM or Cache.</p> Signup and view all the answers

    Which microoperation corresponds to transferring the contents of AC to memory?

    <p>STA</p> Signup and view all the answers

    What is the primary role of control signals in a digital system's organization?

    <p>To initiate the sequence of microoperations.</p> Signup and view all the answers

    In microoperations, what does the operation 'AC  AC + DR' represent?

    <p>Adding the contents of DR to AC.</p> Signup and view all the answers

    Which microoperation is commonly used to shift the contents of a register?

    <p>Shift</p> Signup and view all the answers

    What does the Decode Cycle accomplish in a computer's instruction execution?

    <p>It translates the instruction into a form understandable by the control unit.</p> Signup and view all the answers

    Which operation involves indirectly addressing data in a microoperation?

    <p>Indirect</p> Signup and view all the answers

    In the context of digital systems, what is the Register Transfer Language primarily concerned with?

    <p>The organization and operations of registers and microoperations.</p> Signup and view all the answers

    What does the Register Transfer Language primarily describe?

    <p>The sequence of microoperations in a computer</p> Signup and view all the answers

    Which of the following is typically NOT a common representation of registers?

    <p>As a flowchart</p> Signup and view all the answers

    What does the notation 'R2  R1' signify in Register Transfer Language?

    <p>Copying contents of R1 to R2</p> Signup and view all the answers

    How are registers designated in Register Transfer Language?

    <p>Using capital letters followed by numbers</p> Signup and view all the answers

    What is a key characteristic of a register transfer?

    <p>It copies all bits simultaneously during one clock pulse</p> Signup and view all the answers

    Which register is responsible for holding memory addresses?

    <p>Memory Address Register</p> Signup and view all the answers

    Which microoperation involves moving data without altering the source?

    <p>Register transfer</p> Signup and view all the answers

    What does the acronym 'PC' represent in register designations?

    <p>Program Counter</p> Signup and view all the answers

    What is the main purpose of using Register Transfer Language in digital system design?

    <p>To exhibit the functional relationship between registers</p> Signup and view all the answers

    Which of the following registers might typically contain intermediate data from operations?

    <p>Data Register</p> Signup and view all the answers

    Study Notes

    Basic Computer Organization

    • Computer organization describes the functions and design of different units within a computer.
    • It focuses on how these units store and process information, as well as how they interact with external sources.
    • Key components include:
      • CPU (Central Processing Unit)
      • ALU (Arithmetic Logic Unit)
      • Memory
      • Control Unit
      • I/O Devices

    Bus Structure

    • A bus is a subsystem that transfers data between computer components.
    • It can connect multiple components either inside or between computers.
    • Buffer registers temporarily hold data during transfers.

    Simple Digital Systems

    • Digital systems, like computers, are created by connecting digital hardware modules.
    • Modules consist of combinational and sequential circuits.
    • They are designed in a modular approach, dividing them into subsystems to perform specific tasks.
    • Examples of modules include Decoders, Counters, Arithmetic Logic Units.

    Microoperations

    • A Microoperation is a basic operation performed on data in registers.
    • It is typically executed in parallel during one clock pulse.
    • Examples of microoperations:
      • Shift
      • Count
      • Load
      • Add
      • Subtract
      • Increment
      • Decrement
      • Clear

    Von Neumann Architecture

    • This architecture integrates instructions and data in a single memory space.
    • This design is often used in modern computers.

    Registers in CPU

    • Registers are temporary storage locations inside the CPU.
    • They provide rapid access to frequently used data and program instructions.
    • Examples of CPU registers:
      • PC (Program Counter): holds the address of the next instruction to be executed.
      • IR (Instruction Register): holds the current instruction being processed.
      • AC (Accumulator): holds the results of arithmetic and logic operations.
      • MAR (Memory Address Register): holds the address of the memory location being accessed.
      • MDR (Memory Data Register): temporarily holds data being transferred to or from memory.

    Register Transfer Language

    • Register Transfer Language (RTL) is a symbolic language used to describe the functions of a digital system.
    • It focuses on:
      • Registers involved
      • Transformations performed on data
      • Data transfers between registers

    Register Transfer

    • Copying data from one register to another is known as a Register Transfer.
    • This transfer is non-destructive; the original data in the source register is preserved.

    Memory (RAM)

    • RAM (Random Access Memory) is used to store data and instructions.
    • It is volatile, meaning data is lost when power is turned off.
    • Data is organized in a sequential manner, with each location having a unique address.
    • Data is accessed by specifying the address.
    • Memory can be viewed at the register level as a device 'M'.
    • Memory transfer involves copying data between memory locations and registers.

    Complete Computer Description (Microoperations)

    • The complete description of a computer using RTL includes:
      • A set of registers and their functions.
      • A set of microoperations that the computer can perform.
      • Control signals that initiate the sequence of microoperations.

    Memory (RAM) (Random Access Memory)

    • Byte: 8 bits
    • Word: 2 bytes (16 bits)
    • Double Word: 4 bytes (32 bits)
    • Quad Word: 8 bytes (64 bits)

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    Description

    This quiz covers the fundamentals of computer organization, including the core components such as the CPU, ALU, memory, and I/O devices. It also explores bus structures and simple digital systems, emphasizing modular design. Test your understanding of these essential concepts in computer engineering.

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