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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.
What is SEGMENT - Assembler directives SEGMENT: This directive defines to assembler the start of a segment with name segment-name. Segment name must be unique and follows the
What is bus arbitration? It is method by which the next device to become the bus master is selected and bus mastership is transferred to it. There are two ways for doing this:
Problem (a) Forensic methodology consists of three phases. Briefly explian these three phases. (b) Sometimes it's best not to perform hard-disk acquisition. Provide two
What are coupling and cohesion and why are they important concepts in software design?
A real time system is a computer system that updates the information at the similar rate it receives it. Real time system is of two types:- a) Hard real time system and
Directed-Test Methodology Building a directed verification environment with a comprehensive set of directed tests is very time-consuming and difficult. As directed tests only c
An AWT stands for Abstract Window Toolkit. AWT handles programmers to develop Java applications with GUI components, like windows, and buttons. The Java Virtual Machine (JVM) is re
UDP (User Diagram Protocol) is? It is both Connectionless and Message Oriented.
Bus arbitration: In single bus architecture when more than 1 device requests the bus, a controller known as bus arbiter decides who gets the bus; this is known as the bus arbi
Why are interrupt masks provided in any processor? Interrupt mask enable the higher priority devices comes first and there for lower priority devices comes last. The interrupt
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