ECE 250 Quiz #11 A Simple Computer

Copyright © Dean Johnson 1995 (johnson@wmich.edu)
The following questions are designed to test your knowledge of the Mark III computer, which is constructed from components found in the ECE 250 lab. There are only 5 questions. These quiz questions are similar in nature to the types of questions you will find on the final exam concerning this material. This is the last quiz of the semester. (Go back to homepage.)

  1. The accumulator is normally associated with which of the following computer system blocks?

    1. MEMORY
    2. CONTROL UNIT
    3. ARITHMETIC UNIT
    4. INPUT/OUTPUT

  2. Which one of the following statements concerning the Mark III computer is FALSE?

    1. The Memory Address Register (MAR), during the Execution cycle, contains the contents of Program Counter.
    2. The Accumulator is a shift register.
    3. The Program Counter (PC), during the Fetch cycle, contains the address of the next instruction to be executed.
    4. The contents of the Instruction Register can not be loaded into the Accumulator.
    5. The Pulse-Time Distributor has 16 states.

  3. 11111 is a binary coded representation of the Mark III instruction:

    1. LDA 3
    2. STA 3
    3. STA 7
    4. Halt
    5. ADA 7

  4. If (A) = 00011 and (R6) = 00010, executing the Mark III instruction LDA 6 yields which of the following results?

    1. (A) = 00110, (R6) = 00010
    2. (A) = 00010, (R6) = 00010
    3. (A) = 00011, (R6) = 00011
    4. (A) = 00110, (R6) = 00000
    5. (A) = 00010, (R6) = 00110

  5. During the Fetch cycle, the Mark III computer:

    1. Loads the Accumulator
    2. Enables the Adder
    3. Stores data into a memory register
    4. Loads the Instruction Register.
    5. Increments the Program Counter