PaletteInScreenThirteen - What a color palette is and how it is applied in various screen modes.
PixelByPixelScrollingGeneral - What is pixel by/to pixel scrolling and how is it done?
DrawingCirclesLineGeneral(?) - How to plot a circle in any graphics mode with LINE.
DrawingCirclesPsetGeneral - How to plot a circle in any graphics mode with PSET.
DoubleBufferingGeneral - What is double buffering and how is it done?
VerticalRetraceGeneral - How to synchronize your games with the screen refresh rate.