The Essentials of Computer Organization and Architecture
4th Edition
ISBN: 9781284045611
Author: Linda Null, Julia Lobur
Publisher: Jones & Bartlett Learning
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Chapter 7, Problem 14E
a.
Program Plan Intro
- In programmed I/O, the CPU continuously checking (polling) the hardware items that were associated with each I/O port.
- Programmed I/O is very easy to understand but it is very slow and inefficient.
- Usage: Programmed I/O is commonly used in sensors because they are good for controlling applications.
b.
Program Plan Intro
Programmed I/O:
- In programmed I/O, the CPU continuously checking (polling) the hardware items that were associated with each I/O port.
- Programmed I/O is very easy to understand but it is very slow and inefficient.
- Usage: Programmed I/O is commonly used in sensors because they are good for controlling applications.
c.
Program Plan Intro
DMA:
- It is called as direct memory access. The CPU transfers to and from the I/O devices with the help of programmed I/O and interrupt-driven I/O.
- That is, DMA allows certain hardware-systems in order to access the main system memory, independent of the CPU.
- During I/O the CPU runs some commands that are simple enough to be programmed.
- Usage: DMA are good for small and medium sized systems.
d.
Program Plan Intro
Interrupt-driven I/O:
- In interrupt-driven I/O the device intimates the CPU about the available input.
- It is very fast and efficient.
- Usage: Interrupt driven I/O are commonly used in personal systems.
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Chapter 7 Solutions
The Essentials of Computer Organization and Architecture
Ch. 7.7A - Prob. 1ECh. 7.7A - Prob. 2ECh. 7.7A - Prob. 3ECh. 7.7A - Prob. 5ECh. 7.7A - Prob. 6ECh. 7.7A - Prob. 8ECh. 7.7A - Prob. 9ECh. 7.7A - Prob. 10ECh. 7 - Prob. 1RETCCh. 7 - Prob. 2RETC
Ch. 7 - Prob. 3RETCCh. 7 - Prob. 4RETCCh. 7 - Prob. 5RETCCh. 7 - Prob. 6RETCCh. 7 - Prob. 7RETCCh. 7 - Prob. 8RETCCh. 7 - Prob. 9RETCCh. 7 - Prob. 10RETCCh. 7 - Prob. 11RETCCh. 7 - Prob. 12RETCCh. 7 - Prob. 13RETCCh. 7 - Prob. 14RETCCh. 7 - Prob. 15RETCCh. 7 - Prob. 16RETCCh. 7 - Prob. 17RETCCh. 7 - Prob. 18RETCCh. 7 - Prob. 19RETCCh. 7 - Prob. 20RETCCh. 7 - Prob. 21RETCCh. 7 - Prob. 22RETCCh. 7 - Prob. 23RETCCh. 7 - Prob. 24RETCCh. 7 - Prob. 25RETCCh. 7 - Prob. 26RETCCh. 7 - Prob. 27RETCCh. 7 - Prob. 28RETCCh. 7 - Prob. 29RETCCh. 7 - Prob. 30RETCCh. 7 - Prob. 31RETCCh. 7 - Prob. 32RETCCh. 7 - Prob. 33RETCCh. 7 - Prob. 34RETCCh. 7 - Prob. 35RETCCh. 7 - Prob. 36RETCCh. 7 - Prob. 37RETCCh. 7 - Prob. 38RETCCh. 7 - Prob. 39RETCCh. 7 - Prob. 40RETCCh. 7 - Prob. 41RETCCh. 7 - Prob. 42RETCCh. 7 - Prob. 43RETCCh. 7 - Prob. 44RETCCh. 7 - Prob. 45RETCCh. 7 - Prob. 46RETCCh. 7 - Prob. 47RETCCh. 7 - Prob. 48RETCCh. 7 - Prob. 49RETCCh. 7 - Prob. 1ECh. 7 - Prob. 2ECh. 7 - Prob. 3ECh. 7 - Prob. 4ECh. 7 - Prob. 5ECh. 7 - Prob. 6ECh. 7 - Prob. 7ECh. 7 - Prob. 8ECh. 7 - Prob. 9ECh. 7 - Prob. 10ECh. 7 - Prob. 11ECh. 7 - Prob. 12ECh. 7 - Prob. 13ECh. 7 - Prob. 14ECh. 7 - Prob. 15ECh. 7 - Prob. 16ECh. 7 - Prob. 17ECh. 7 - Prob. 18ECh. 7 - Prob. 19ECh. 7 - Prob. 20ECh. 7 - Prob. 21ECh. 7 - Prob. 22ECh. 7 - Prob. 23ECh. 7 - Prob. 24ECh. 7 - Prob. 25ECh. 7 - Prob. 26ECh. 7 - Prob. 27ECh. 7 - Prob. 28ECh. 7 - Prob. 29ECh. 7 - Prob. 30ECh. 7 - Prob. 31ECh. 7 - Prob. 32ECh. 7 - Prob. 33ECh. 7 - Prob. 34ECh. 7 - Prob. 35ECh. 7 - Prob. 36ECh. 7 - Prob. 37ECh. 7 - Prob. 38ECh. 7 - Prob. 39ECh. 7 - Prob. 40ECh. 7 - Prob. 41ECh. 7 - Prob. 42ECh. 7 - Prob. 43ECh. 7 - Prob. 44ECh. 7 - Prob. 45ECh. 7 - Prob. 46ECh. 7 - Prob. 47ECh. 7 - Prob. 48ECh. 7 - Prob. 49E
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