CGA/EGA pinout. CGA/EGA uses a digital signal, referred to as TTL (Transistor-Transistor Logic), for the transmission of its video signal. TTL is a signal that operates in an on or off state only, thus limiting the amount of displayable colors. Intensity bits are used to expand available colors up to four times the original amount. Commonly used in low resolution computers. Free service manuals.

Connector pinout: CGA/EGA

CGA/EGA uses a digital signal, referred to as TTL (Transistor-Transistor Logic), for the transmission of its video signal. TTL is a signal that operates in an on or off state only, thus limiting the amount of displayable colors. Intensity bits are used to expand available colors up to four times the original amount. Commonly used in low resolution computers.

CGA/EGA

pin	name	direction	description	color
1	Gnd		Gnd
2	Gnd/Red Int		Gnd/Red Int
3	Red		Red
4	Green		Green
5	Blue		Blue
6	Green Int		Green Int
7	Blue Int		Blue Int
8	H. Sync		H. Sync
9	V. Sync		V. Sync