Input/output (i/o) unit, Basic Computer Science

Assignment Help:

Input/output (I/o) unit:

This unit provides the interface between the computer and the computer peripherals. A computer peripheral is any unit, which is attached to, but is not part of, the computer - e.g. visual display units, teleprinters, etc. A simple computing system may have only one input and one output. In such cases, an analogue-to-digital converter (ADC) may suffice for the input, and a digital-to-analogue converter (DAC) for the output. Alternatively, complex-computing systems can literally service thousands of peripherals.

Figure illustrates a simple I/O unit. The I/O unit can be described as a fan-out (and fan-in) device. The computer's 8-bit bi-directional data bus can be connected to port 1, 2 or 3. The port chosen is dependent upon the address, on the address bus. The system illustrated allows three peripherals to communicate with the computer. Only one peripheral at a time can send data to the computer, or receive data from the computer. However, this is not a problem, because the computer works very much faster than the peripheral, and hence, it appears that the computer services all three peripherals simultaneously.

 

542_input output unit.png


Related Discussions:- Input/output (i/o) unit

Spreadsheet development, Basic steps/tasks involved in spreadsheets develop...

Basic steps/tasks involved in spreadsheets development

Artificial intelligence agents, Artificial Intelligence Agents In the ea...

Artificial Intelligence Agents In the earlier teach, we discussed what we will be talking about in Artificial Intelligence and why those tasks are important. This lecture is all

Write a long note on the viewfinder of a camera, Question 1 What are the d...

Question 1 What are the different kinds of editing? Explain them in detail Question 2 Write a long note on the viewfinder of a camera Question 3 Describe the various typ

Which port does FTP uses, Why is it called out of band protocol? A1) FTP us...

Why is it called out of band protocol? A1) FTP uses port 20 and port 21; port 20 is used for data connection, whereas port 21 is used for control connection. FTP is known as out-of

System software, note on high level language and low level language

note on high level language and low level language

Discuss the anatomy of xml document, Question 1 What is web browser? List ...

Question 1 What is web browser? List and explain the most common used web server Question 2 Discuss the anatomy of XML document Question 3 Discuss the various attr

Chat, Chat: The word chat in English language means - casual conversat...

Chat: The word chat in English language means - casual conversation. On Internet it means the same, except that you need to use text and your keyboard skills are tested. Earli

Explain the working of bus connection, Question 1 Explain the working of B...

Question 1 Explain the working of Bus connection Question 2 Write a note on: Robotics and Voice Recognition Question 3 Describe the construction of CD-ROM Question 4

Explain need for model view controller(mvc), Question 1 What is HTTP? How ...

Question 1 What is HTTP? How does it work? Question 2 What are the various methods of HttpServletResponse interface? Question 3 What is Web server? What are the va

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd