Video controller, Computer Graphics

Video controller: A Fixed area of the system memory controller for the frame buffer, and the video controller is given direct access to the frame – buffer memory, frame – buffer locations, and the corresponding screen positions are referenced in Cartesian coordinates for many graphic computer, monitors, the coordinates origin is defined at the lower left screen corner. Figure. The screen surface is then represented as the first quadrant of a two – dimensional system with positive x value, increasing to the right and positive y values increasing from bottom to top. on some personal computer, the coordinate origin is referred as the upper left corner of the screen, so the y values are invented. Scan line are then labeled from y max     at the top of the screen to 0 at the bottom. Along each scan line screen pixel positions are labeled from 0 to ax max, figure. The basic refresh operations of the video controller are shown in diagram. Two registers are used to store the coordinates of the screen pixels. Initially the x register is set to x and y register is set to y m frame buffer for this pixel position is then retrieved and used to set the intensity of the CRT beam. Since the screen must be referred at the rate of 60 frames per second, the simple procedure illustrated in figure cannot be accommodated by typical RAM chips. The cycle times is too slow. 

Posted Date: 7/1/2012 6:27:58 AM | Location : United States







Related Discussions:- Video controller, Assignment Help, Ask Question on Video controller, Get Answer, Expert's Help, Video controller Discussions

Write discussion on Video controller
Your posts are moderated
Related Questions
What is a Blobby object?  Some objects do not handle a fixed shape, but change their surface characteristics in sure motions or when in proximity to other objects. That is call

Methods of Animation - Computer Animation First method: in this, artist makes a succession of cartoon frames that are then combined in a film. Second method: in this,


Find Out Projection Matrix for Oblique Projection To find out projection matrix for oblique projection, we want to find out the direction vector d. Because vector PP' and vect

Explain window to view port transformation

BlackJack is a popular card game played in many casinos. The player plays against the dealer aiming to reach 21 points, or a score higher than the dealer without exceeding 21. The

What is fixed point scaling?  The location of a scaled object can be controlled by a position known as the fixed point that is to remain unchanged after the scaling transformat


I have an assignment to do & it''s due on Wednesday !

Raster and Random Scan Display Technologies For display or printing graphics objects, various technologies have been invented. Research and development is still on for getting