4-56. To keep track of time intervals, which of the
following types of timing circuitry can be used?
1. Monitor clock only
2. Programmable internal timer only
3. Monitor clock and programmable internal
timer
4. Real-time clock (RTC)
A. Accumulator
B. Index register
C. Instruction register
D. Program counter
E. Status indicating register
Figure 4A.—Memory type circuits.
4-57. To keep track of real time, which of the following
timing circuits can be used?
1.
2.
3.
4.
RTC only
Monitor clock only
RTC and monitor clock
RTC and programmable interval timer
4-58. Which of the following timing circuits are
4-59.
4-60.
4-61.
software/machine instruction controlled?
1. RTC only
2. Monitor clock only
3. Programmable interval timer only
4. RTC, monitor clock, and programmable
interval timer
To channel data inside the computer, what type of
circuits are primarily used with registers for
instruction and control operations?
1. Analog conversion
2. Data routing circuits
3. Code converter circuits
4. Interface circuits
A general-purpose register is also known by what
name?
1. Instruction
2. Accumulator
3. Program counter
4. Status indicating
General-purpose registers are generally the same
size as the computer’s memory word.
1. True
2. False
IN ANSWERING QUESTIONS 4-62 THROUGH 4-68,
SELECT FROM FIGURE 4A THE MEMORY TYPE
CIRCUIT THAT APPLIES TO THE FUNCTION
DESCRIBED IN EACH QUESTION.
4-62. Used for address modification and counting.
1. A
2. B
3. C
4. D
4-63. Holds the address of the next instruction to be
executed.
1. B
2. C
3. D
4. E
4-64. Can be used to indicate the status of operations in
the computer.
1. B
2. C
3. D
4. E
4-65. Outputs of this register are translated into
commands for CPU execution.
1. B
2. C
3. D
4. E
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