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

Rdbms, what is physical data structure in internals of rdbms?

what is physical data structure in internals of rdbms?

How is a multidimensional array defined pointer, How is a multidimensional ...

How is a multidimensional array defined in terms of a pointer to a collection of contiguous arrays of lower dimensionality ? C does not have true multidimensional arrays. Howev

Show the noframes tag, Q. Show the Noframes Tag? tag can be used for t...

Q. Show the Noframes Tag? tag can be used for those browsers which aren't able to interpret tags. Even though most, if not all, of your visitors would

Instruction issue degree, Instruction Issue degree : The major concept in s...

Instruction Issue degree : The major concept in superscalar processing is how many instructions we can issue per cycle. If we issue k number of instructions per cycle in a supersca

What are the defining traits of an object-oriented language, The defining t...

The defining traits of an object-oriented language are: * Encapsulation * Inheritance * Polymorphism

How does computer know that overflow has happened, Q. How does computer kno...

Q. How does computer know that overflow has happened? Illustration: Add numbers 65 and 75 in 8 bit register in signed 2's complement notation.  Here expected result is

What is vector processing, What is vector processing?  There is ...

What is vector processing?  There is a class of computational problems that are beyond the capabilities of a conventional computer. These problems are characterized by t

Which one memory requires refreshing, Which of following requires refreshin...

Which of following requires refreshing SRAM., DRAM., ROM. or EPROM. ? Ans. DRAM. requires refreshing.

Explain the structure of a c program, Explain the Structure of a C Program?...

Explain the Structure of a C Program? Each C program consists of one or more functions one of the which must be main(). A function name is forever followed by a pair of parenth

Significance of having less memory references, Q. What is the significance ...

Q. What is the significance of having less memory references? As the time needed for memory reference is more than that of a register reference so increased number of memory r

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