xianc78 @xianc78@gameliberty.club

For more details on how a carry-lookahead adder works, see my blog post: https://www.righto.com/2025/01/pentium-carry-lookahead-reverse-engineered.html

Another closeup of the adder. For this photo, I removed the top two metal layers and left the bottom metal layer. At the top, the partial sum circuit is repeated 8 times. At the bottom, XOR is repeated 8 times. In the middle, the carry lookahead circuitry is a jumble since each bit is different. 4/n

By tracing out the circuitry of the adder, I created a schematic. It takes a lot of logic gates to build a carry-lookahead adder, but it is faster than a regular adder. It figures out all the carries in parallel, using a tricky technique of merging "generate" and "propagate" signals. 3/n

Here's a closeup of the adder and associated circuitry. The 8-bit adder is marked in red. The circuitry below helps test the chip; the Pentium includes a lot of circuitry just for testing. In this photo, I removed all 3 metal layers, showing the polysilicon and doped silicon forming transistors. 2/n

Adding on a computer is trickier than you'd expect. The Pentium processor (1993) used a variety of circuits for addition. I reverse-engineered an adder in the floating point unit and found that it is a "Kogge-Stone carry-lookahead adder", using some tricks to make it faster. Let's look inside. 1/n

@mrsaturday @sun "why isn't the USA a tech hotbed anymore"

@sun I worry about the precedent it sets. Something else will replace Tiktok just like it replaced Vine, but saying "we'll ban your software if you don't let us backdoor you and twist your arm to censor on our behalf" is anti-free speech.

Just found out the soyboy who runs GamingOnLinux nuked my profile because I put a notice on it explaining politely, without going into detail, why I don't use the site anymore.

I am literally living rent free in this twat's head. Dude was checking me out months after I was gone.

For further damning context: the reason I left was because Liam silently censored a comment of mine criticizing the German government's leniency towards child abusers. When I asked why, he could not give me a solid answer and was dismissive.

The guy also shills Bluesky out the ass, unironically believes Trump is going to start a genocide, and is friends with the Lutris maintainer who is known to be a DeVault simp. (yes, guilt by association fallacy, weak argument. But I'm taking a shit here, not trying to be smart)

So basically GOL is run by retarded closet pedophile who doesn't believe in free speech, has no balls, and is all-in on the pink pill.

Sometimes, I dream about the sucker asking for an interview with us (canithesis) for his lame site like 10 years from now, seeing us push towards support for Linux gaming, only to get fucked off lmao. And I laugh every time

Someone should make a feature film out of the life of Stanley Meyer.

https://rumble.com/v6a5epg-california-sets-itself-on-fire-in-trump-protest-new-world-next-week.html

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https://rumble.com/v6apc4j-elon-unmusked-roundtable-discussion-2023.html

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FOSS RuneScape from 2009. You can run your own server and play single player, or play on community servers. It receives pretty regular updates as well!

https://2009scape.org/

#osrs #runescape

https://www.youtube.com/watch?v=308KoLSLlCc some nerd trying to rebuild the psion again

zip files are being renamed as chinese files, due to woke