Show HN: X86CSS – An x86 CPU emulator written in CSS

Incredible achievement. Horrible development on CSS front.

CSS should NOT be becoming turing complete. Nor any other DSL.

> A hover-based clock, such as the one in Jane Ori's CPU Hack, is fast and stable, but requires you to hold your mouse on the screen, which some people claim does not count as turing complete for whatever reason, so I wanted this demo to be fully functional with zero user input.

That hover clock post is from 2023 and the "some people claim does not count" post is 2022. They were probably talking about the ones that make you check thousands of boxes to drive the logic forward.

Anyway, very cool advancement.

This is absolutely horrible... in a good way. Kinda like Doom in a PDF. Well done.

I think we can look forward to running this on more non-Chrome browsers once @function [0] gets wider support?

[0]: https://caniuse.com/wf-function

So is this x86 compatible, or 8086 compatible? Because those are different things

There is absolutely no reason for css to be turing complete. None. That being said, well done

Whoa!

Completely unrelated but somehow unsurprising:

Zero-day CSS: CVE-2026-2441 exists in the wild - https://news.ycombinator.com/item?id=47062748 - February 2026 (233 comments)

This feels like... just because you can, doesnt mean you should.

Only Chrome ..

this is incredible

Abomination! (Makes sign of cross)

Also: wow.

> Your browser is unable to run this demo. Please try with an up-to-date Chromium-based browser.

Sorry to see internet regressing to Internet Explorer days.

Edited to add: This is the message I get when using Firefox.

[flagged]

I realy hope an AI did this intead of human, such a waste of time (the css part, not the x86)