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

Determine the logic gate having input 0 and output 1, The output of a logic...

The output of a logic gate is 1 when all its inputs are at logic 0. The gate is either ? Ans. When all inputs of logic gate at logic 0 and output is 0. The gate is either a NOR

Logical representations, Logical Representations: If all human beings ...

Logical Representations: If all human beings spoke the same language, there would be a much more less misunderstanding in the world. The problem regarding with software engine

Legacy systems and current infrastructure, Legacy systems and current infra...

Legacy systems and current infrastructure - Information System This problem is most easily understood using the everyday example of the rail ways where the rail network infras

Floating-point processing and instruction encoding, write a program that e...

write a program that evaluate the following arithmetic expression: ((A+B) /C) * ((D-A)+E) assign test value to the variable and display the resulting value.

Prolog, Prolog: Still we can take our card game from the previous lect...

Prolog: Still we can take our card game from the previous lecture like a case study for the implementation of a logic-based expert system. So there the rules were: four cards

Asp.net mvc over asp.net webforms, What is the greatest benefit of using as...

What is the greatest benefit of using asp.net mvc over asp.net webforms? Ans) It is complex to unit test UI with webforms, where views in mvc can be very simply unit tested.

Accessing a cache - computer architecture, Accessing a Cache:  Direct ...

Accessing a Cache:  Direct mapping: (Block address) modulo (Number of cache block in the cache) The valid bit indicate whether an entry contain a valid address.

Explain the concept behind pre-compositing adobe, Question 1: (a) Expl...

Question 1: (a) Explain the concept behind Pre-Compositing Adobe After Effects. (b) Briefly describe the Wiggler function in Animation help in Adobe After Effects. (c)

Liquid crystal displays, LCDs are the screens of choice for lightweight scr...

LCDs are the screens of choice for lightweight screens andportable computers. They consume very little electricity and have advanced technically to quite good resolutions and colou

What is semaphores, What is semaphores?  A semaphore 'S' is a synchroni...

What is semaphores?  A semaphore 'S' is a synchronization tool which is an integer value that, apart from initialization, is accessed only by two standard atomic operations; wa

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