The ADV478 and ADV471 monolithic triple video DACs—fit-, form- and function-compatible equivalents of the Bt478 and Bt471—are designed to act as the interface between computer graphics memory (such as in the VGA graphics of an IBM Personal System/2®) and the electron gun drivers of a color CRT. Both devices contain three DACs (for red, green, and blue primary colors), RAM for color lookup tables, separate memory for special color overlays, and output circuitry. Read full article