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

When recursion functions are declared inline, Describe what happens when re...

Describe what happens when recursion functions are declared inline? Ans) Inline functions property says whenever it will call; it will copy the whole definition of that functi

Classification according to pipeline configuration, Classification accordin...

Classification according to pipeline configuration: According to the configuration of a pipeline, the following parts are recognized under this classification: Unifunct

What is pli, What is PLI Programming  Language  Interface  (PLI)  of  V...

What is PLI Programming  Language  Interface  (PLI)  of  Verilog  HDL  is  a  mechanism  to  interface  Verilog programs  with  programs  written  in  C  language.  It also pro

What are the variations in a fast adder, a. Design a fast adder. What are t...

a. Design a fast adder. What are the variations in a fast adder? b. Define how the virtual address is changed into real address in a paged virtual memory system. Give an example

Learn synchronization principles, Q. Learn synchronization principles? ...

Q. Learn synchronization principles? To learn synchronization subsequent dependencies are recognized:  i)  Data Dependency: These are RAW, WAW and WAR dependency.  ii) Co

Bi polar junction transistor, draw input and output charectoristics of BJT ...

draw input and output charectoristics of BJT and justify CE configuration provides large current amplification

Determine about the security policy, Determine about the Security Policy ...

Determine about the Security Policy In the United States, the government has a separate organisation looking after the security measures and providing guidelines to all departm

Explain about cathode ray tubes, Q. Explain about Cathode Ray Tubes? Ca...

Q. Explain about Cathode Ray Tubes? Cathode ray tube is the major technology on that televisions and monitors have been based.  CRT is a partially evacuated glass tube which is

Which header file is used for screen handling function, Which header file i...

Which header file is used for screen handling function:- The header files stdio.h having definitions of constants, macros and types, along with function declarations for stan

Discuss the advantages of expression tree, Discuss its advantages over the ...

Discuss its advantages over the other evaluation techniques. The expression tree is determined by using a post-order traversal of the expression tree as given here: 1. If such

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