Explain keyboard input and video output, Computer Engineering

Assignment Help:

Q. Explain Keyboard Input and Video output ?

A Keystroke read from keyboard is termed as a console input and a character displayed on the video screen is known as a console output. In assembly language reading and displaying character is most tiresome to program. Though these tasks were greatly simplified by convenient architecture of 8086/8088. Thatarchitecture offers for a pack of software interrupt vectors starting at address 0000:0000.

The benefits of this type of call is that it appears static to a programmer however flexible to a system design engineer. For illustration INT 00H is a special system level vector which points to the 'recovery from division by zero' subroutine. If new designer come and want to move interrupt location in memory it adjusts entry in the IVT vector of interrupt 00H to a new location. So from the system programmer point of view it's relatively easy to change vectors under program control.


Related Discussions:- Explain keyboard input and video output

Determine a sample rate required for telephone conversation, A sample rate ...

A sample rate of            is required for a good quality representation of telephone conversation. A sample rate of 50 times/second /mile of distance travelled are needed fo

Explain what is a macro and why is it important, Question 1: Spreadshee...

Question 1: Spreadsheet packages are widely used in Business. a) Explain why spreadsheets are so useful. b) Spreadsheet files are sometimes saved for use by other software p

Determine about the security- accidental damage, Determine about the securi...

Determine about the security- accidental damage accidental damage is best guarded against by keeping back up files or use Grandfather-Father-Son (GFS) method; also use of passw

Vector-scalar instructions- vector processing, Vector-Scalar Instructions :...

Vector-Scalar Instructions : In this type, when the combination of vector and scalar are fetched and saved in vector register. These instructions are denoted with the many function

What is debate - architecture, What is Debate Debate took place in the ...

What is Debate Debate took place in the 1980s and first half of the 1990s. It was resolved as RISC the winner since it allows more efficient pipelining, results in simpler hard

How non- textual information is contained in a web page, How non- textual i...

How non- textual information is contained in a web page? Non-textual information as digitized photo and a graphics image is not inserted directly into a HTML document. In place

State the advantages of CMOS, State the advantages of CMOS. Ans. Su...

State the advantages of CMOS. Ans. Subsequent are the advantages of CMOS: Both n-channel and p-channel devices are fabricated on similar substrate. Low power di

Explain data mining, Data Mining is an analytic method designed to explore...

Data Mining is an analytic method designed to explore data and then to validate the findings by applying the detected patterns to latest subsets of data.  The ultimate goal of dat

How to changing the directory in dos, Q. How to Changing the Directory in D...

Q. How to Changing the Directory in DOS? You can change the directory. After changing the directory, the new directory becomes the default directory. For example, you change th

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