ASSIGNMENT 5
Textbook Assignment: “Central Processing Units and Buses,” chapter 5, pages 5-13 through 5-23.
5 - 1
5-2
5-3
5-4
The interrupt that occurs with the actual event that
caused the interrupt is (a) what type and (b) what
will be the status of the condition of the process or
program after the interrupt is processed?
1. (a) Asynchronous
(b) Different conditions will exist
2. (a) Asynchronous
(b) The exact same conditions will exist
3. (a) Synchronous
(b) Different conditions will exist
4. (a) Synchronous
(b) The exact same conditions will exist
What type of interrupt occurs (a) when there is an
error in a peripheral device and (b) when I/O
operations are terminated?
1. (a) External (b) internal
2. (a) External (b) external
3. (a) Internal (b) internal
4. (a) Internal (b) external
In a microcomputer, an interrupt from an internal
hard disk can be masked out by the computer.
1. True
2. False
In microcomputers, which of the following
methods can be used to direct the processor to the
address of the interrupt of a maskable interrupt?
1. An interrupt code only
2. A ROM lookup table only
3. A ROM/PROM lookup table only
4. An interrupt code and a ROM/PROM lookup
table
IN ANSWERING QUESTIONS 5-5 THROUGH 5-11,
SELECT FROM THE FOLLOWING LIST THE
INTERRUPT CLASS THAT MATCHES THE
CONDITION OR PRIORITY DESCRIBED IN EACH
QUESTION.
5-5.
5-6.
5-7.
5-8.
5-9.
5-10.
5-11.
5-12.
5-13.
1. Class I
2. Class II
3. Class III
4. Class IV
An RTC overflow has occurred.
An intercomputer timeout has occurred.
The highest priority interrupt that can occur in the
computer.
A power out of tolerance has occurred.
The computer will execute a power failure
processing routine.
An input chain interrupt has occurred,
An illegal op code has been executed in the CPU.
Lower level interrupts can be disarmed and/or
armed by software.
1. True
2. False
Which of the following interrupts can usually be
locked out by software?
1. Power fault
2. External interrupt
3. CPU instruction fault
4. IOC instruction fault interrupt
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