8-bit fractals

[8-bit fractals @8bitfractals]

Julia sets for f(z) = z² + c
where c = -1;
-0.11 + 0.66i;
-0.8 + 0.16i;
i

Sinclair ZX81 (Z80, 1981)

[8-bit fractals @8bitfractals]

Leave running overnight. It could be sped up a bit by using single-precision floats; but it's never going to be a very fast program

[8-bit fractals @8bitfractals]

Burning Ship fractal

IBM Personal Computer (8088 ‼️16-bit‼️, 1981)

[BBC Micro Bot @bbcmicrobot]

BBC BASIC code tweet
Author: @8bitfractals 🏆 &0091
Source: https://t.co/uOc9C2iRIf

[juan rodríguez @juanvarp]

@8bitfractals con un par de cambios ,por fin he conseguido meter la hoja completa en la pantalla

[juan rodríguez @juanvarp]

@8bitfractals reconozco que me ha costado entenderbel código original del BBC MICRO (imagen con fondo negro),pero al final creo que lo he podido adaptar al AMSTRAD CPC,muy contento con el resultado.ESPECTACULAR!

[juan rodríguez @juanvarp]

Publicado por @8bitfractals para Oric-1
Este adaptado a AMSTRAD CPC

[juan rodríguez @juanvarp]

@8bitfractals Pues en el Atari XE ,también se pueden meter los fractales...jaj

[8-bit fractals @8bitfractals]

Call with (julia -1.27 0.04) — in principle the program will work with other complex constants, but it's optimized for long & narrow Julia sets (to suit the screen aspect ratio). Press BRK to exit once it's finished plotting

[8-bit fractals @8bitfractals]

Julia set for f(z) = z² + c
where c = -1.27 + 0.04i

Casio AI-1000 (HD61700, 1989)

[8-bit fractals @8bitfractals]

Listing concludes in the next tweet (it's not a very large program but it's quite a small screen)

[juan rodríguez @juanvarp]

Impresionante cómo lo va dibujando,lo he adaptado al AMSTRAD CPC

[8-bit fractals @8bitfractals]

A restricted chaos game

BBC Microcomputer (6502, 1981)

[8-bit fractals @8bitfractals]

Finally: a stripped-down version that works on the unexpanded (3k RAM) machine. Ignore SETUP, TILE, and ZZZ and use these replacement definitions of SET-PARAMS, MANDELBROT, and VIEWFINDER. Screenshots show
-.9 .25 4. 150 MANDELBROT
-.5 .58 20. 200 MANDELBROT

[8-bit fractals @8bitfractals]

Mandelbrot set

Jupiter ACE (Z80, 1982)

[8-bit fractals @8bitfractals]

Run time depends on parameters, but expect c. 2 hours at 100 iterations or 6 hours + at 300 iterations. It would be frustrating to find out after that you weren't quite looking in the right place, so you can use VIEWFINDER for a quick ultra-low-resolution glimpse

[8-bit fractals @8bitfractals]

Leave running overnight (preferably a night when you can sleep late in the morning)

[8-bit fractals @8bitfractals]

Julia set for f(z) = z² + c
where c = 0.405 + 0.215i

BBC Microcomputer (6502, 1981)