Apparatus for implementing stereoscopic images in computer system

1. Field of the Invention An apparatus for implementing stereoscopic images without control programs on a CRT monitor in a computer system includes a video adapter storing the information of stereoscopic images reading out the contents of the information, and outputting them as analog image signals of red, green and blue colors, vertical synchronizing signals and horizontal synchronizing signal, an analog scan line controller operating in response to external on/off control signals, and outputting the analog image signals including left eye image information and right eye image information to the monitor in response to the vertical synchronizing signals from the video adapter, and a shuttering device being operated by at least any one of the signals from the video adapter.