Superfast Mandelbrot generator v9 and v10

It is based on an algorithm published on pouet in 2021. One its implementation (v9) uses 16 color mode and another (v10) uses 4 color mode and textures to simulate 8 colors. Generated pictures are 128x256 and 256x256 raster images respectively. It is very likely that this algoritm implementation is the fastest known Mandelbrot set computation routine for the Z80.

A zipped dsk-image is here: RUN"M4 or RUN"M16 to get 4 (8) or 16 colors.

You can also try RUN"M16OS to get a 16 color overscan variant (176x256, v7). The next image is generated by this program.

The largest image can be gotten by RUN"M16OSX. It gives you another 16 color overscan variant (192x280). The next image is generated by this program. This image requires a color display, it may be shown incorrectly on a green display.

Sources are available on github.