2 ; http://www.retroprogramming.com/2014/03/plotting-mandelbrot-set-on-zx-spectrum.html
8 ld hl,-180 ; x-coordinate
15 ld hl,-96 ; y-coordinate
50 cp 46 ; 46 ? 2 x √ 2 << 4
56 db 254 ; trick to skip next instruction
65 FIXMUL: ; hl = hl x de >> 24
75 SCALE: ; bc = (hl + e) x zoom
80 MULT16BY16: ; hl:bc (signed 32 bit) = hl x de
116 MULT8BY16: ; returns a:hl (24 bit) = a x de
129 PLOT: ; plot d = x-axis, e = y-axis
161 ABSVAL: ; returns hl = |hl| and increments
162 bit 7,h ; a if the sign bit changed