What is an EGA (enhanced graphics adapter)? Manufactured by IBM in 1984, the Enhanced Graphics Adaptor (EGA) is a digital video standard that falls between CGA and VGA in terms of color and space resolution. Operating with RGB digital TTL video input signal, EGA offered more color selections (16 distinct colors from a palette of 64) than the earlier CGA standards at video resolutions of up to 640×350 pixels.