1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
navik [9.2K]
3 years ago
15

Why I/O modules is needed between system busand I/O devices?​

Computers and Technology
1 answer:
beks73 [17]3 years ago
5 0

Answer:

1. Processor communication -- this involves the following tasks:

<em>a. exchange of data between processor and I/O module</em>

<em>b. command decoding - I/O module accepts commands sent from the processor. E.g., the I/O module for a disk drive may accept the following commands from the processor: READ SECTOR, WRITE SECTOR, SEEK track, etc. </em>

<em>c. status reporting – The device must be able to report its status to the processor, e.g., disk drive busy, ready etc. Status reporting may also involve reporting various errors. </em>

<em>d. Address recognition – Each I/O device has a unique address and the I/O module must recognize this address. </em>

<em />

2. Device communication – The I/O module must be able to perform device communication such as status reporting.

3. Control & timing – The I/O module must be able to co-ordinate the flow of data between the internal resources (such as processor, memory) and external devices.

4. Data buffering – This is necessary as there is a speed mismatch between speed of data transfer between processor and memory and external devices. Data coming from the main memory are sent to an I/O module in a rapid burst. The data is buffered in the I/O module and then sent to the peripheral device at its rate.

5. Error detection – The I/O module must also be able to detect errors and report them to the processor. These errors may be mechanical errors (such as paper jam in a printer), or changes in the bit pattern of transmitted data. A common way of detecting such errors is by using parity bits.

You might be interested in
There is the Iphone MAX, Iphone XR and Iphone XS. which iphone is the very NEWEST and which one do you recommend? explain.
Pavlova-9 [17]

Answer:me myself would go with the Iphone XR

Explanation:

Because its like a combined phone of those two phones together and its not as exspnsive as the other phones and overall its good cause i have had it since it came out and had no problems with it.

3 0
3 years ago
Read 2 more answers
Which of the following are picture adjustments that can be made to images?
Masteriza [31]

Answer:

D - All of the above

Explanation:

8 0
3 years ago
Read 2 more answers
Tuklasin<br>awain 2: Grapiko ng Pananagutan<br>Isulat sa graphic organizer pa​
mrs_skeptik [129]
What are you saying????
7 0
2 years ago
Hi weegy, what is the latest android os?
KatRina [158]
<span>The newest android os is:
Android 7.0 Nougat

</span>
7 0
3 years ago
Ruben is helping his team choose a leader. Of the people Ruben is considering, which one has qualities most related to being an
siniylev [52]

An effective team leader shows great skills in every area, shows great support and respect to his teammates and is very easy to get along with.

5 0
3 years ago
Read 2 more answers
Other questions:
  • A student is helping a friend with a home computer that can no longer access the Internet. Upon investigation, the student disco
    9·1 answer
  • Which of the following represents inbound logistics for a bookstore
    13·1 answer
  • on average, someone with a bachelor’s degree is estimated to earn _______ times more than someone with a high school diploma
    13·1 answer
  • Sulfur content is measured in
    11·1 answer
  • Which one of the following items is an example of software?
    12·2 answers
  • If you are trying to improve your budget and spending, which option would save you the most money?
    13·2 answers
  • A customer has a computer for a home business, but wants to have another computer as a web server. What would be the best soluti
    11·2 answers
  • The getElementById DOM Method do?
    13·1 answer
  • How to scan a screenshot on Brainly?
    9·2 answers
  • "You have created a Word document named apple.docx using Microsoft Word. What type of a file is apple.docx ? Select all that app
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!