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

Two services that are used to deal with communication, Explain about the tw...

Explain about the two services that are used to deal with communication. Message Service: Used by the application servers to change short internal messages, all system commu

Principles for developing successful system, Q. Principles for developing s...

Q. Principles for developing successful system? (1)  Both developers and customers must be involved for accuracy in the information. (2)  A problem solving approach must be

Short notes on model primitives in director mx 2004, Question: (a) Prep...

Question: (a) Prepare short notes on the model primitives in Director MX 2004. (b) Therefore using the box primitive write codes to prepare a new model resource of length 50

Stack operation and interrupts in microprocessor, Let us review the operati...

Let us review the operation of the stack within the 68HC11, the stack is a defined area of RAM which is last in first out register (LIFO) . Access to the stack is made via a stack

Calculate max distance so subscriber get speech reproduction, In a subscrib...

In a subscriber loop that contains a series resistance of 300 ohms to protect the batteries in the exchange, a normalized telephone draws 10 mA and its standard input d.c. resistan

Explain advantage of static storage class, Explain advantage of static stor...

Explain advantage of static storage class The second and more subtle use of 'static' is in connection with external declarations. With external constructs it provides a privacy

linq file extension, What is the LINQ file extension that interacts with C...

What is the LINQ file extension that interacts with Code Behinds objects? Ans) The extension of the file is .dbml

Find out the number of control lines for 32 to 1 multiplexer, The number of...

The number of control lines for 32 to 1 multiplexer is ? Ans. For 32 (2 5 ) the number of control lines and to select one i/p between them total 5 select lines are needed.

Constraint satisfaction problems, Constraint Satisfaction Problems: Fu...

Constraint Satisfaction Problems: Furthermore I was perhaps most proud of AI on a Sunday. However this particular Sunday, a friend of mine found an article in the Observer reg

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