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We ran a Unix-like OS Xv6 on our home-built CPU with a home-built C compiler (2020)

news.ycombinator.com Likes Web 2026-03-25 06:20:08

How we ran a Unix-like OS (Xv6) on our home-built CPU with our home-built C compiler [Thanks for many comments and votes on Hacker News! ] It’s been two years since I started working as a software engineer. I sometimes tell my colleagues about a student project I did in my junior year of university, and it’s so well-received that I’m writing this post. Now, let me ask you a question. Have you ever designed your own ISA, built a processor of that ISA on FPGA, and built a compiler for it? Furth

Topics: cpu experiment group os xv6

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Paleontologists Find Skeleton That Weirdly Looks Exactly Like Barney the Purple Dinosaur

futurism.com Unknown 2026-03-25 16:30:31

We're a happy fa-m-ily! Funky Dino Deep in the heart of Texas, a goofy-looking dinosaur skeleton has been unearthed — and it's got a funny head that makes it look like a dead wringer for Barney, the purple lizard of 90s television fame with the annoyingly cheery voice. As the Houston Chronicle reports, the dinosaur in question — called Eryops megacephalus — has a wide, grinning smile on a large flat skull that sits on four squat legs. Paleontologist Andre LuJan told the newspaper that he foun

Topics: dinosaur dinosaurs lujan skull texas

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Tesla shows off its first fully autonomous delivery to convince us its self-driving cars work well

engadget.com Unknown 2026-03-25 15:38:05

Tesla's robotaxi service may have had some early hitches, but the company said it just successfully delivered a car autonomously. Using the same robotaxi technology, Tesla showed the delivery process of a Model Y from its Gigafactory Texas in Austin to a customer with a roughly 30-minute journey as seen in a video posted on X. Unlike the robotaxi service launch last week, the automated delivery had no safety monitor, nor anyone behind the wheel. Tesla's CEO, Elon Musk, also posted on X that the

Topics: delivery posted robotaxi service tesla

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Show HN: Vet – A tool for safely running remote shell scripts

news.ycombinator.com Unknown 2026-03-25 18:56:52

vet Don't just run it — vet it. Stop blindly piping to bash. vet lets you inspect remote scripts for changes, run them through a linter, and require your explicit approval before they can execute. The Problem We've all seen this pattern for installing software: curl -sSL https://example.com/install.sh | bash This is dangerous. The script could be malicious, the server could be compromised, or a transient network error could result in executing a partial script. The Solution vet wraps thi

Topics: approval explicit run script vet

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Are TikTok Age Tests Legit? Orthopedists Explains How to Measure Biological Age

cnet.com See Full Bio 2026-03-25 11:00:00

If you’ve scrolled through TikTok or Instagram, you’ve probably seen fitness challenges based on your biological age. In some cases, it’s funny to see people attempting feats that seem impossible for their age or impressive that they can do them. You’ve probably felt inspired to try out some of these challenges and even questioned their legitimacy. “Most of these challenges, like completing 11 consecutive push-ups (for women), doing pull-ups or performing a kneeling-to-squat jump, are quick scr

Topics: age biological exercise fitness said

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Amazon Is Building a Gigantic Computing Facility to Match the Human Brain

futurism.com Unknown 2026-03-25 17:45:20

But to what end? Fields of Data Indiana's newest cash crop isn't soybeans or corn; it's AI data centers — lots and lots of AI data centers. The New York Times reports that Amazon is building a vast complex of AI infrastructure facilities on top of 1,200 acres of former cropland, all meant for startup Anthropic's project to build an AI model that is as powerful, complex — and, just possibly, as intelligent — as the human brain. To that end, Amazon has constructed seven data centers on site, w

Topics: ai amazon complex data water

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I’ve tested countless fitness trackers and this is the best one you can get for under $50

androidauthority.com Unknown 2026-03-25 15:30:49

Xiaomi Smart Band 10 The Xiaomi Smart Band 10 doesn’t reinvent the wheel, but it makes meaningful upgrades where it counts, including added training tools and a slightly larger display. For budget-conscious buyers who want reliable tracking, a polished aesthetic, and up to 21 days of battery life, it's a no-brainer. I’ve long tipped my hat to Xiaomi’s Smart Band line (a.k.a. Mi Band in some regions), which nearly always punches above its weight. The latest device, the Xiaomi Smart Band 10, cont

Topics: 10 band smart tracking xiaomi

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If only this Android camera powerhouse was easy to buy, I’d recommend it in a heartbeat

androidauthority.com Unknown 2026-03-25 16:30:20

OPPO Find X8 Ultra The OPPO Find X8 Ultra is one of the best Android phones for photography and videography, but it's ultra difficult for most of us to find and purchase due to its regional exclusivity. I’ve been waiting a long time for this, but finally, I spent some time with the OPPO Find X8 Ultra. I was a big fan of the Find X8 Pro that preceded it, especially its camera capabilities, and the Ultra builds on that, so I was eager to give it a spin. Unfortunately, this is the Chinese model s

Topics: android camera oppo ultra x8

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Puzzle platformers, desktop aquariums and other new indie games worth checking out

engadget.com Unknown 2026-03-25 15:00:29

Welcome to the latest edition of our indie game roundup. We’ve got quite a bit on deck this week, starting with a few nuggets of news. In case you missed it, the Steam Summer Sale is upon us, which means there are bargains galore on the storefront (we’ve rounded up some of the tastier deals). If you're anything like me, you'll end up buying a bunch of games that you'll never end up playing but hope to get to some day. In any case, good luck with your deal hunting! I read an interesting story o

Topics: game games ll steam xbox

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Tesla shows off its first fully autonomous delivery to convince us its self-driving cars work

engadget.com Unknown 2026-03-25 20:38:05

Tesla's robotaxi service may have had some early hitches, but the company said it just successfully delivered a car autonomously. Using the same robotaxi technology, Tesla showed the delivery process of a Model Y from its Gigafactory Texas in Austin to a customer with a roughly 30-minute journey as seen in a video posted on X. Unlike the robotaxi service launch last week, the automated delivery had no safety monitor, nor anyone behind the wheel. Tesla's CEO, Elon Musk, also posted on X that the

Topics: delivery posted robotaxi service tesla

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ZeQLplus: Terminal SQLite Database Browser

news.ycombinator.com Unknown 2026-03-25 16:32:02

ZeQL+ : Terminal SQLite Database Browser Features Open any SQLite database file Very fast Runs in a Terminal / CMD window Tiny executable with no dependencies List all tables in the database to browse Paginated view of table rows Run custom SQL queries and view the results Cross platform: macOS, Linux, Windows Open source Install Pre-built binaries for macOS, Linux, Windows 10+ are available as zip files in the releases page. Just extract and run directly with no need to install. Ho

Topics: database linux macos sqlite zeql

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We ran a Unix-like OS Xv6 on our home-built CPU with a home-built C compiler

news.ycombinator.com Likes Web 2026-03-25 16:20:08

How we ran a Unix-like OS (Xv6) on our home-built CPU with our home-built C compiler [Thanks for many comments and votes on Hacker News! ] It’s been two years since I started working as a software engineer. I sometimes tell my colleagues about a student project I did in my junior year of university, and it’s so well-received that I’m writing this post. Now, let me ask you a question. Have you ever designed your own ISA, built a processor of that ISA on FPGA, and built a compiler for it? Furth

Topics: cpu experiment group os xv6

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Meta’s Xbox-Branded Quest 3S Just Sold Out for All the Wrong Reasons

gizmodo.com James Pero 2026-03-25 17:00:47

Everyone loves limited-edition stuff. There’s Sony’s 30th anniversary PS5, or Analogue’s many limited edition Pocket handhelds, or— I don’t know—the Shamrock f***ing Shake. But there’s one type of person who loves limited-edition stuff more than your average consumer, and it’s a scalper. For proof of that, see Meta’s recently released Xbox-branded Quest 3S. See Meta Quest Xbox Edition at Best Buy In case you missed it, Meta’s new limited-edition Quest 3S bundle just recently sold out, which on

Topics: edition just meta xbox xr

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This New Li-Fi Bridge System Promises To Be Big for Broadband

cnet.com See Full Bio 2026-03-25 16:00:00

At the 2025 Mobile World Congress in Barcelona in March of this year, pureLiFi and Solace Power announced a new and innovative product: the Bridge XC. The goal of the Bridge XC is to enable fixed wireless access providers -- including 5G home internet, other cellular broadband providers and satellite internet -- to more quickly and easily deploy broadband service to customers. Just recently, pureLiFi partnered with digital service provider, du Telecom, to improve deployment for 5G and fixed wir

Topics: bridge fi li technology xc

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The New Prescription Gummy That May Help With Hair Loss

cnet.com See Full Bio 2026-03-25 18:00:03

You've tried the serums, the vitamins and the topical solutions. But have you tried a prescription gummy for hair loss? Hers, a telehealth company that provides online healthcare services and products for women, announced the launch of its Biotin plus Minoxidil Gummy, the first-of-its-kind prescription gummy formulated to support hair regrowth. Available through forhers.com, this gummy combines prescription-strength minoxidil, the only FDA-approved ingredient for female hair loss, with biotin, a

Topics: gummy hair minoxidil prescription women

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Breville Luxe Brewer Review (2025): Good Drip, Real Cold Brew

wired.com Matthew Korfhage 2026-03-25 15:38:00

The new Breville Luxe Brewer is designed for hot coffee. It makes excellent, subtle, hot drip coffee. But it also does something that almost no other fancy coffee maker on the market achieves. It makes real cold brew coffee—the sweet and gentle stuff, the cool elixir of smooth summers and milky heaven. The Luxe is part of a new generation of drip coffee makers that has helped transform drip coffee from bitter office fuel into a subject for connoisseurship. The Luxe's predecessor, the Precision

Topics: brew coffee cold drip luxe

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Staples Union & Scale FlexFit Desk Converter Review: Reliable Riser

wired.com Julian Chokkattu 2026-03-25 17:03:00

The included keyboard rest is optional to install, though the whole thing is designed to work together. It's a little annoying. I wish you could roll the tray into the riser to hide it, which would go a long way in making the FlexFit look a little more elegant, and could also help with storage. You also can't adjust the height of the tray, so while I didn't have issues typing on a keyboard, I found my wrist cramping up a little when using my Apple Magic Trackpad because it was a little too low.

Topics: desk flexfit height little riser

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The Supreme Court just upended internet law, and I have questions

theverge.com Adi Robertson 2026-03-25 20:00:00

is a senior tech and policy editor focused on VR, online platforms, and free expression. Adi has covered video games, biohacking, and more for The Verge since 2011. Age verification is perhaps the hottest battleground for online speech, and the Supreme Court just settled a pivotal question: does using it to gate adult content violate the First Amendment in the US? For roughly the past 20 years the answer has been “yes” — now, as of Friday, it’s an unambiguous “no.” Justice Clarence Thomas’ opi

Topics: age sites states texas verification

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I finally found the ultimate USB-C charger for traveling

zdnet.com Adrian Kingsley-Hughes 2026-03-25 16:00:19

ZDNET's key takeaways Perfect way to share 100W of power between three devices. This cable does exactly what it says it will on the box - something that a lot of cables can't claim. Some might find the 65W limit a bit restrictive for charging laptops. View now at Amazon View now at Futurizta more buying choices Over the past couple of years, I've tested a handful of multi-connector USB-C charging cables. You've probably seen them for sale on big-name e-commerce websites, and maybe on social m

Topics: box cable cables charging power

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Xbox Game Pass Ultimate Review: The Best Content Deal in Gaming

cnet.com See Full Bio 2026-03-25 20:00:05

CNET’s expert staff reviews and rates dozens of new products and services each month, building on more than a quarter century of expertise. 8.2 / 10 SCORE Game Pass Ultimate Buy at Amazon $60 at HP Pricing $10 a month (Console Core) $12 a month (PC) $15 a month (Console Standard) $20 a month (Ultimate - PC and Console) Pros Unique breadth of features Great for both console and PC gaming Catalog of hundreds of games Cons Available games change frequently PC integration headaches Cloud gamin

Topics: game games month pass xbox

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Gear News This Week: The Repairable Fairphone 6 Arrives and Samsung's Galaxy Unpacked Is Up Next

wired.com Julian Chokkattu 2026-03-25 20:00:00

The sixth generation of Fairphone arrived this week, featuring a modular design built to last from ethically sourced components in a climate-conscious way. It has been a couple of years since its predecessor, the Fairphone 5, and the Fairphone 6 is refreshingly smaller and lighter. It boasts a 6.3-inch OLED screen with a 120-Hz adaptive refresh rate, a Qualcomm Snapdragon 7s Gen 3 processor, and a 4,415 mAh battery that Fairphone says is good for up to two days. You also get a 50-megapixel main

Topics: dell fairphone new premium xps

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Use Xfinity Mobile on a Pixel phone? You may be getting a Wi-Fi Speed Boost (APK teardown)

androidauthority.com Unknown 2026-03-25 15:29:48

Edgar Cervantes / Android Authority TL;DR Xfinity Mobile’s WiFi PowerBoost lets your phone access Wi-Fi speeds in excess of the internet plan you’re paying for. So far it’s supported iPhones and Samsung Galaxy flagships and mid-rangers, but not Android phones at large. New settings for “Xfinity Speed Boost” in Google’s Adaptive Connectivity Service app suggest availability could be improving. Going online with your smartphone over a Wi-Fi connection can offer a lot of advantages compared to

Topics: app authority phones service xfinity

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Spark AI (YC W24) is hiring a full-stack engineer in SF (founding team)

news.ycombinator.com Unknown 2026-03-26 07:01:03

About Us ⚡️ Join us to accelerate the energy transition with technology. At Spark, we’re building the AI engine behind the next generation of renewable energy infrastructure. Our mission is simple yet ambitious: To help renewable energy developers build solar farms, battery storage plants, and related projects more efficiently. If you’re excited to see your products directly accelerate the energy transition, read on. We’re already powering decision-making for industry leaders like Colliers En

Topics: ai building energy excited experience

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Use Xfinity Mobile on a Pixel phone? You may be getting a Wi-Fi Speed Boost

androidauthority.com Unknown 2026-03-26 11:29:48

Edgar Cervantes / Android Authority TL;DR Xfinity Mobile’s WiFi PowerBoost lets your phone access Wi-Fi speeds in excess of the internet plan you’re paying for. So far it’s supported iPhones and Samsung Galaxy flagships and mid-rangers, but not Android phones at large. New settings for “Xfinity Speed Boost” in Google’s Adaptive Connectivity Service app suggest availability could be improving. Going online with your smartphone over a Wi-Fi connection can offer a lot of advantages compared to

Topics: fi phones service wi xfinity

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New Process Uses Microbes to Create Valuable Materials from Urine

news.ycombinator.com Unknown 2026-03-26 09:43:41

Researchers from the Lawrence Berkeley National Laboratory (Berkeley Lab), UC Irvine, and the University of Illinois Urbana-Champaign (UIUC), have used biology to convert human urine into a valuable product. The team genetically modified yeast to take the elements present in urine and create hydroxyapatite – a calcium and phosphorus-based mineral naturally produced by humans and other animals to build bones and teeth. Commercially manufactured hydroxyapatite is used in surgery and dentistry to

Topics: hydroxyapatite make urine used yeast

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I tested a bunch of gaming laptops and these are the best

theverge.com Antonio G. Di Benedetto 2026-03-26 11:05:13

is a reviewer covering laptops and the occasional gadget. He spent over 15 years in the photography industry before joining The Verge as a deals writer in 2021. Gaming laptops come in various shapes and sizes, though many of the heavy hitters remain thick and beefy machines that maximize cooling to get the most out of their powerful chips. Most are awash in RGB lighting and edgy designs geared towards capital-G Gamers, but there are also thinner, lighter options that are more portable and less

Topics: gaming gpu laptop laptops rtx

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Only 2 exhibitor tables up for grabs at TechCrunch All Stage — claim by June 29

techcrunch.com Techcrunch Events 2026-03-26 11:15:00

This is not a drill. If your startup exists to power the growth of other startups or is the kind of innovation tech leaders need to see firsthand, your moment is now. TechCrunch All Stage hits Boston’s SoWa Power Station on July 15 — and just 2 exhibitor tables remain. Yes, only two, and only until June 29. Tables for TC All Stage have been flying, and this is truly your last chance to claim your place in front of founders and investors across all stages. Ways that exhibiting amplifies your br

Topics: brand exhibitor stage table tc

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Coinbase is the best-performing stock in the S&P 500 in June, and may have even more room to run

cnbc.com Tanaya Macheel 2026-03-26 16:38:21

People watch as the logo for Coinbase, the biggest U.S. cryptocurrency exchange, is displayed on the Nasdaq MarketSite jumbotron at Times Square in New York on April 14, 2021. Coinbase is the top performer in the S&P 500 in June, boosted by positive regulatory updates, product launches and, of course, its very inclusion in the benchmark stock index at the end of May. The crypto exchange's outperformance in the S&P 500 extends back to the April 8 market low, just after President Donald Trump's

Topics: 500 circle coinbase exchange stock

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Trump ends trade talks with Canada over a digital services tax

engadget.com Unknown 2026-03-26 16:23:22

President Donald Trump said the US is ending trade talks with Canada, effective immediately, over a tax on digital services that will impact American tech companies. He also pledged to announce further tariffs on Canada within the next week, adding in a Truth Social post that "they will be paying to do business with the United States of America." Canada's digital services tax (DST) is set to take effect on June 30, though it will be applied retroactively. According to The New York Times , US co

Topics: canada dst tax trade trump

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A New Threads Feature Saves You From Seeing and Posting Spoilers: Here's How It Works

cnet.com See Full Bio 2026-03-26 16:18:18

Social media can accidentally spoil a streaming movie or show for those who haven't yet watched it. Threads, the popular social media platform from Meta, now has a new feature that could save you from spoiling your next watch. The new feature allows users to mark media and text posts as spoilers. If it's a photo, the spoiler will then appear blurred in feeds, and text will be grayed out. Clicking on both types makes the spoiler visible. Netflix and Marvel are the first major studios to use the

Topics: feature posts spoiler text threads

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Latest Tech News

We ran a Unix-like OS Xv6 on our home-built CPU with a home-built C compiler (2020)

Paleontologists Find Skeleton That Weirdly Looks Exactly Like Barney the Purple Dinosaur

Tesla shows off its first fully autonomous delivery to convince us its self-driving cars work well

Show HN: Vet – A tool for safely running remote shell scripts

Are TikTok Age Tests Legit? Orthopedists Explains How to Measure Biological Age

Amazon Is Building a Gigantic Computing Facility to Match the Human Brain

I’ve tested countless fitness trackers and this is the best one you can get for under $50

If only this Android camera powerhouse was easy to buy, I’d recommend it in a heartbeat

Puzzle platformers, desktop aquariums and other new indie games worth checking out

Tesla shows off its first fully autonomous delivery to convince us its self-driving cars work

ZeQLplus: Terminal SQLite Database Browser

We ran a Unix-like OS Xv6 on our home-built CPU with a home-built C compiler

Meta’s Xbox-Branded Quest 3S Just Sold Out for All the Wrong Reasons

This New Li-Fi Bridge System Promises To Be Big for Broadband

The New Prescription Gummy That May Help With Hair Loss

Breville Luxe Brewer Review (2025): Good Drip, Real Cold Brew

Staples Union & Scale FlexFit Desk Converter Review: Reliable Riser

The Supreme Court just upended internet law, and I have questions

I finally found the ultimate USB-C charger for traveling

Xbox Game Pass Ultimate Review: The Best Content Deal in Gaming

Gear News This Week: The Repairable Fairphone 6 Arrives and Samsung's Galaxy Unpacked Is Up Next

Use Xfinity Mobile on a Pixel phone? You may be getting a Wi-Fi Speed Boost (APK teardown)

Spark AI (YC W24) is hiring a full-stack engineer in SF (founding team)

Use Xfinity Mobile on a Pixel phone? You may be getting a Wi-Fi Speed Boost

New Process Uses Microbes to Create Valuable Materials from Urine

I tested a bunch of gaming laptops and these are the best

Only 2 exhibitor tables up for grabs at TechCrunch All Stage — claim by June 29

Coinbase is the best-performing stock in the S&P 500 in June, and may have even more room to run

Trump ends trade talks with Canada over a digital services tax

A New Threads Feature Saves You From Seeing and Posting Spoilers: Here's How It Works

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