[fishanz]

Doesn't have the pascal source?

[agumonkey]

I just remembered it was mostly inline asm, like http://sh1.webring.com/people/gu/um_3792/demos.html

ps: here is the description in pseudo code (4 lines near bottom) http://pascal.sources.ru/demo/otfire.htm

tl;dr: it's a very approximative diffusion process.

[ca98am79]

found it! It had a different filename:

https://github.com/ca98am79/my-first-programs/blob/master/ps...

[ca98am79]

yes, sorry I don't think the source survived. I will keep looking