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

Php, Which of the following is NOT a type of SQL constraint?

Which of the following is NOT a type of SQL constraint?

Explain process creation and process termination, Question 1 Explain diffe...

Question 1 Explain different functions of an operating system. Explain the evolution of operating systems Question 2 Explain process creation and process termination Ques

Debugging, Debugging Once a program has been written, it has to ...

Debugging Once a program has been written, it has to be tested first to ensure that it is free of errors. It is very normal that any program written will contain mistake

Application programming, Do you offer application programming? Please sugge...

Do you offer application programming? Please suggest?

Multiple queues, I need to create mulitple queues assignment that run concu...

I need to create mulitple queues assignment that run concurrently. It is like a queue simulation with  number of checkouts with a random probability of clients, joining any one

What is structure, Problem 1 Write a recursive function to find sum of ...

Problem 1 Write a recursive function to find sum of even numbers from 2 to 50 Writing function and explanation Problem 2 What is structure? Explain how structu

Data input , Data Input : There are several aspects of data input that nee...

Data Input : There are several aspects of data input that need careful consideration. We shall assume that in a laboratory environment you are mainly concerned with entering data

Software engineering, 158.254 Software Development Lifecycle Management Ass...

158.254 Software Development Lifecycle Management Assignment 1 This assignment focuses on requirements engineering. The context to this assignment is the development of a system

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