Computer Registers and Common Bus System
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Questions and Answers

How is the increment operation achieved in a common bus system?

  • By enabling the count input of the counter (correct)
  • By using an address bus
  • By applying the content of any register onto the bus
  • By transferring the content of the bus into the designated destination register

    • What purpose does a single register for the address serve in a common bus system?

  • Eliminates the need for an address bus (correct)
  • Transfers content to AC
  • Enables the increment operation
  • Provides additional storage space

    • Where do the 16 inputs of AC come from in a common bus system?

  • Address bus
  • Destination register
  • Adder and logic circuit (correct)
  • Counter

    • During which clock cycle event does the content of the bus transfer to the destination register?

    <p>Clock transition at the end of the cycle</p> Signup and view all the answers

    What is the significance of the bit in position 15 of the instruction code when the operation code is 111?

    <p>It designates a mode bit.</p> Signup and view all the answers

    How many instruction code formats does a Basic Computer have?

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

    How many bits are used to specify an operation in register-reference instructions?

    <p>16 bits</p> Signup and view all the answers

    What does the leftmost four bits in register-reference instructions always represent?

    <p>Binary equivalent of 7</p> Signup and view all the answers

    What is not needed when using a single register for the address in a common bus system?

    <p>Additional storage registers</p> Signup and view all the answers

    Which category of instructions includes operations like CMA, INC, and shift instructions?

    <p>Arithmetic operations</p> Signup and view all the answers

    What do the last four bits represent in input-output instructions?

    <p>Binary equivalent of F</p> Signup and view all the answers

    Which instruction is used for moving information to and from memory and processor register AC?

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

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