Applesoft: High-Res Collision Counter

Applesoft's High-Res collision counter is a byte that is incremented whenever an object drawn crosses a non-black dot on the screen. Applesoft does not initialize or use this byte.
The collision counter could be used in a game: such as, to detect when a lunar lander hits a mountain. Set the counter to zero, draw the lander, then check for non-zero values indicating the collision. It is up to the you to initialize and check this byte.
Published Date: Feb 18, 2012