data is not usually noticeable, since this occurs in the overscan area where it is not ordinarily visible. However, if these false Playfield pixels intersect Player/Missile pixels a collision will be flagged. The solution for Players/Missiles that have moved into the overscan area is to reset their positions to zero to remove them from the display and so prevent false collisions. See also CTIA/GTIA Horizontal blank interrupt Vertical blank interrupt References External links De Re Atari published by the Atari Program Exchange Mapping the Atari, Revised Edition by Ian Chadwick ANTIC chip data sheet scanned to PDF. Atari 8-bit family Graphics chips Integrated circuits Computer display standards