This program shows how to draw two Bezier curves that are continuous in the first derivative: the three control points around the "meeting point" should be on the same straight line.
This algorithm draws Arcs (partial circles) in the GRAPH PICTure, using an approximative "circumference length" code. The result can sometimes be wrong by one pixel. Written in assembly language so it is very fast.
A small program which simply draws random dots on the stack display and exits when you press the drop key, demonstrating a "fog" in the LCD. Also includes some nice documentation on assembly language programming. For the S series only.
Vertically or diagonally flips a grob. Also rotates grobs. Written in assembly language for speed; includes source code. Rotates the 131x64 standard grob 90 degrees in about 0.2 seconds on a 48G.
Fills the display with a full-screen grob by "raining" it down one line at a time, very quickly. Written in assembly language for both the S and G series.