This is a small basic program for rendering beautiful Mandelbrot and Julia fractals. It can render images in PMode 3 (both palettes) or PMode 4 (both palettes or NTSC artifacting), and save them to tape or disk.
Right now, being completely written in Basic, it takes a long time to generate images, but future versions will include several optimizations and probably will have the image generation remade in assembler code for speed.
The program is provided as plain .ASC file, .CAS file and .VDK file for convenience. Newer versions will be made available here.