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

Python - Dictionary, A dictionary is variable and is one more container typ...

A dictionary is variable and is one more container type that can store any number of Python objects, counting other container types. Dictionaries consist of pairs (identified items

Data structure, #question.a tree has 0 off springs at each node. if it had ...

#question.a tree has 0 off springs at each node. if it had a label L, what will be the maximum number of nodes that the tree can have. only an expression involving the number of no

Telecommunications network, Telecommunications network: "A telecommuni...

Telecommunications network: "A telecommunications network, at its simplest, may be regarded as comprising a transmission network, an arrangement of transmission paths and swit

Explain Modern architecture of microprocessor, There are many other techniq...

There are many other techniques in which companies who manufacture microprocessors have attempted to get better the performance of their CPUs. Cache memory this is a small quantit

Software Exploration, I need to review 2 different softwares one is windows...

I need to review 2 different softwares one is windows based and the other is Linux Based. Please Ask for further details

Search in problem solving-artificial intelligence, Search in Problem Solvin...

Search in Problem Solving: If Artificial intelligence I may inform the other sciences about anything, it is about problem solving and, in specific, how to find solutions to pro

Assignment, write an essay explaining the following: 1.Storage aspects a. D...

write an essay explaining the following: 1.Storage aspects a. Disk formatting, b.Disk boot block ,c.Bad block removal, d.Compensation.

The skill of Assembly Language, The skill of Assembly Language Programming ...

The skill of Assembly Language Programming (AoA), Randy Hyde''s acclaimed text on assembly language programming, is the most-frequently recommended book on 80x86 assembly language

Flowchart, create a flowchart showing average score for the 3 quizzes assum...

create a flowchart showing average score for the 3 quizzes assume that there are 3 sections each having 5 students the only valid number to be entered is 1-100 for the quizzes shou

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