This is great. It somewhat reminded me of Steve Ciarcia's build of a Mandelbrot-generating supercomputer from around 1990. That was also made from microcontrollers (Intel 8052 in that case).

Do you have a link? As far as I can tell you're referring to a BYTE magazine article, but I can only find vague references to it, not anything specific enough that would allow me to locate it.

It was in Byte circa 1989-1991 & I've been trying to search for it with no luck so far.

FOUND IT! https://archive.org/details/1982-10-byte-magazine-october-1-...

https://archive.org/details/eu_BYTE-1988-11_OCR/page/n6/mode...

Page 399

This one as well. :)

Just cleaning up the links for future searchers and adding the first part:

Steve Ciarcia, CIARCIA’S CIRCUIT CELLAR

BYTE Octover 1988, A Supercomputer Part 1. Steve begins a supercomputer project by looking at multiprocessing basics.

https://archive.org/details/1982-10-byte-magazine-october-1-... (page 283 in the magazine, page 315 in the PDF)

BYTE November 1988, A Supercomputer Part 2. Steve continues the supercomputer project with a look at the Mandelbrot set.

https://archive.org/details/eu_BYTE-1988-11_OCR/page/n465/mo... (page 399 in the magazine, page 466 in the PDF)

BYTE December 1988, A Supercomputer Part 3. This final part looks at hardware nuts and bolts and also at the driver program.

https://archive.org/details/1982-10-byte-magazine-october-1-... (page 327 in the magazine and PDF)

The computer was animating a Julia set in one of the clips.