However, The ID software team that later made Duke Nukem found a way around the hardware limitations. They used a technique called double buffering, they were aware that the VGA graphics controller keeps two copies of the screen so they programmed the game to draw the graphics changes of the hidden copy of the screen then switch the panes around when the rendering is complete at the end of each frame cycle. They also programmed the game to only render the parts of the screen that had changed, like a brick was that was half way off the screen.
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