Abstract

This chapter reviews graphics techniques that produce pictures of the highest resolution and best color shading of which one's IBM PC clone is capable. Despite efforts by the Video Electronics Standards Association to standardize Super VGA modes, there are still a lot of Super VGA cards that use nonstandardized video modes. The chapter discusses functions that are used without delving into the internal workings and registers of the VGA card. The graphics area is one of the least standardized and most rapidly changing facets of PC computing and is severely constrained by the basic design of the IBM PC. The chapter discusses how to generate one's own graphics functions for setting the display mode and plotting a pixel to the screen. For all of the standard VGA display modes, setting up a display mode involves a simple call to the display interrupt with the registers properly set.

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