Superfast Mandelbrot generator v5

It is based on an algorithm published on pouet in 2021. One its implementation uses 16 color mode and another 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 6502.

A zipped dsk-image is here: use *LOAD M4 or *LOAD M16 to get 4 (8 because of dithering) or 16 (8 + flashing) color programs respectively. Start any of them with CALL3584.

Sources are available on github.

This program starts from 0xE00 because it needs 11.5 KB RAM for a lookup table, 16 KB RAM for video and 1 KB for its code. So if you want to run it on the BBC Micro where PAGE is above 0xE00 you will need to use some trick.