Short for Random Access Memory Digital-to-Analog Converter, a single chip on video adapter cards. The RAMDAC's role is to convert digitally encoded images into analog signals that can be displayed by a monitor. A RAMDAC actually consists of four different components - SRAM to store the color map and three digital-to-analog converters (DACs), one for each of the monitor's red, green, and blue electron guns.
Video Card Overview Provides an overview of RAMDAC as well as information about unaccelerated and accelerated video cards, the video chipset, video BIOS, and video memory.
Video Modes, Resolution and Color Describes the technical details of video modes and signals, as well as the major characteristics of the video image. This page is from "The PC Guide."