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Home » Dictionary » Video

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Numeric

Author: Gabriel Torres Last Updated: June 30, 2005
Category: Video

Color Graphics Adapter

Video standard released together with the PC XT and was the first graphic system with colors on the PC. In its highest resolution mode, CGA allowed a resolution of 640x200 pixels with only two simultaneous colors. Another popular CGA resolution was 320x200 pixels with four simultaneous colors.

click to enlarge
CGA video card.

After a while, video card manufacturers started to build ”dual“ video cards, which were, at the same time, MDA and CGA, selectable through a jumper, also allowing Hercules (HGC) mode. You can easily differentiate a standard CGA from a dual video card: by its size (compare pictures). Another detail is that dual and MDA cards also came with a parallel port, which wasn’t found on CGA cards. CGA, MDA and EGA cards used a 9-pin female D-shell connector.


Dual video card.

Notice that you must install a CGA video monitor to a CGA card in order to make the system work. CGA video cards don’t work with other types of video monitors like MDA, EGA, VGA, SuperVGA, etc.

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