It is based on an algorithm published on pouet in 2021. Its implementation uses 16 colors. Generated pictures are 128x256 raster images. It is very likely that this algoritm implementation is the fastest known Mandelbrot set computation routine for the 68000.
An archive with the executable file is here.
This archive also contains a program that gets 32 color fullscreen variant (320x256, v5). The next image is generated by the program.
Sources are available on github.