Programmed input - output technique for computers, Computer Engineering

Assignment Help:

Q. Programmed input - output technique for computers?

Programmed input/output is a useful I/O technique for computers where hardware costs need to be minimised. Input or output operation in these cases may involve:

a)  Transfer of data from I/O device to processor registers.

b)  Transfer of data from processor registers to memory.

With programmed I/O method responsibility of processor is to constantly check status of I/O device to check whether it's free or it has completed inputting data. So this method is quite time consuming where processor wastes so much time in checking and verifying status of an I/O device. Figure (a) gives an illustration of use of programmed I/O to read in a block of data from a peripheral device into memory.


Related Discussions:- Programmed input - output technique for computers

Move a layout cell, If you need to line up the cells next to each other you...

If you need to line up the cells next to each other you can resize and move layout cells as you need. You can change size of a layout cell by using one of its resize handles. Yo

Software engineering, What are coupling and cohesion and why are they impor...

What are coupling and cohesion and why are they important concepts in software design?

why doesn''t c have nested functions, It's not trivial to execute nested f...

It's not trivial to execute nested functions such that they have the proper access to local variables in the having function(s), so they were deliberately left out of C as a simpli

Explain about butterfly permutation, Q. Explain about Butterfly permutation...

Q. Explain about Butterfly permutation? Butterfly permutation:  This kind of permutation is attained by interchanging the most significant bit in address with least significant

Difference between search and search all, SEARCH is a sequential search fro...

SEARCH is a sequential search from the starting of the table. SEARCH ALL is a binary search, continually dividing the table in two halves until a match is found. SEARCH ALL is more

Explain what is high debugging?, It is helped to recure the bugs. A program...

It is helped to recure the bugs. A program has problem that time this debugging is helped to solve the bugs is simply, this is the method of the recure bugs in the programming lang

Message passing programming, Message passing is possible the most widely us...

Message passing is possible the most widely used parallel programming paradigm these days. It is the most portable, natural and efficient scheme for distributed memory systems. It

What do you call an event and when do you call an assertion, What do you ca...

What do you call an event and when do you call an assertion? Assertion based Verification Tools, checks whether a statement holds a explained  property or not, while, Event bas

Give brief description about arithmetic processing unit, Give brief descrip...

Give brief description about arithmetic processing unit To execute the arithmetic operations there is a separate section known as arithmetic processing unit in CPU. The arithme

What is winchester technology, What is Winchester technology? The disk ...

What is Winchester technology? The disk and the read/write heads are placed in a sealed air-filtered enclosure known as Winchester technology.

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