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

What is software and hardware interrupt, What is Software and hardware inte...

What is Software and hardware interrupt The software interrupts are program instructions. These instructions are inserted at desired location in a program. A program formed int

Define colspan and rowspan, Q. Define Colspan and Rowspan? Now let's se...

Q. Define Colspan and Rowspan? Now let's see how to work with COLSPAN (Column Span) and ROWSPAN (Row Span). If we want cell containing Ajay in Figure to be extended to the next

Define miss penalty, Define miss penalty? The extra time required to br...

Define miss penalty? The extra time required to bring the desired information into the cache is known as miss penalty.

What is pattern, What is pattern? A pattern is a proven solution to a g...

What is pattern? A pattern is a proven solution to a general problem. Lots of patterns are used. There are patterns for analysis, architecture, design and execution. Patterns c

#title.sequential circuit, design modulo 12 up synchronous counter using t ...

design modulo 12 up synchronous counter using t flip flop

Research methods, Building on their knowledge of research methods and their...

Building on their knowledge of research methods and their interest in a particular aspect of information technology this assessment enables students to put this knowledge into prac

What is processor time of a program, What is processor time of a program? ...

What is processor time of a program? The periods during which the processor is active is known as processor time of a program it depends on the hardware included in the executi

Explain about communication displays and matrix, Q. What is communication D...

Q. What is communication Displays and Matrix? Communication Displays Communication displays offer support in concluding frequency of communication whether congestion in me

What is input - output commands, Q. What is Input - Output commands? Th...

Q. What is Input - Output commands? There are four kinds of I/O commands which an I/O interface can receive when it's addressed by a processor: Control : This type of c

Illustrate the cache memory operation, Q. Illustrate the Cache Memory Opera...

Q. Illustrate the Cache Memory Operation? It comprises a copy of a part of main memory contents. When a program is running and CPU tries to read a word of memory (instruction o

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