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

SG Fuel power supply, Where can I find power supply HIPRO HP-W460GC33 for S...

Where can I find power supply HIPRO HP-W460GC33 for Silicon Graphics Fuel computer

Excel, how to use excel..

how to use excel..

Write a long note on computer languages, Question 1 Explain the importan...

Question 1 Explain the importance of graphics in multimedia. What are few of the tips to keep in mind while using graphics for the web? Question 2 Write a long note on co

Neural Network, The following data set describes whether a given coordinate...

The following data set describes whether a given coordinate is on land owned by XX government. (x,y) | Class ------------------------ (1.5,6) | owned (2,5) | owned (3,4) | owned (

Artificial interlligence, 7. Name and explain the action in Conceptual Depe...

7. Name and explain the action in Conceptual Dependency which refers to a transfer of possession.

Explanation of components of excel work book, Problem 1 Briefly explain...

Problem 1 Briefly explain Components of Excel Work book Explanation of Components of Excel Work book Problem 2 How do you insert a watermark in the Word docume

Some CPUs provide multiple modes of operation, even though most systems onl...

even though most systems only distinguish among user and kernel modes, some CPUs provide multiple modes. Multiple modes could be used to provide a finer-grained security strategy.

Cp, I NEED FLOW CHART ANT DRAWINGS OF BASIC OPERATIONS OF COMPUTER

I NEED FLOW CHART ANT DRAWINGS OF BASIC OPERATIONS OF COMPUTER

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