Xous security focused open source on 22nm custom silicon

A $9 security board drops—trust nerds swoon, speed skeptics snark

TLDR: Xous unveiled a $9 board on a custom chip built for secure, open devices, even letting you visually inspect the package. Comments split between trust and transparency fans vs speed skeptics, while makers celebrate open programmable IO and friendly tools that make tinkering easy and affordable.

After two quiet years, the Xous team just pulled a rabbit out of a chip: a custom, security‑minded processor (Baochip‑1x) and a $9 “Dabao” board built to run it. The community is buzzing less about specs and more about trust. The chip’s package is polished so you can literally peek inside using IRIS‑style inspection—think “don’t just trust, verify.” Fans cheered the move away from pricey hardware (Precursor was ~$600), and the release notes scream “no drama” for existing users, but the comment section said otherwise.

One user discovered the concept of a warrant canary—a public “we have not been gagged” signal—and shared baochip.com and the Wikipedia page, fueling a whole mini‑lesson in privacy. Another commenter dropped a beginner’s guide: Baochip is an open RISC‑V (an open chip design) with a memory manager, “hitchhiked” on another company’s system‑on‑chip, with extra parts disabled—plus Xous is the OS and Precursor was the earlier, DIY‑friendly gadget. A linked YouTube talk kept the nerds fed. Then the drama: skeptics dunked on 22nm manufacturing and modest cores, asking “is this slow?” while defenders shot back that speed isn’t the point—security and transparency are. Meanwhile, makers are hyped about the open “BIO” programmable IO (like Raspberry Pi’s PIO, but open) and a VS Code plugin (“baochip”) that screams “plug in and play.” Jokes flew: “my toaster has more nanometers,” “can I pay in canaries?” and “$9? Take my money.”

Key Points

  • Xous adds a custom TSMC 22 nm chip, Baochip-1x, built specifically to run the OS, with a $9 “Dabao” evaluation board pre-order campaign.
  • Baochip-1x uses WLCSP packaging with a polished back-side to enable IRIS-style inspection, improving hardware transparency.
  • The release finalizes boot0/boot1 artifacts for Baochip-1x; Precursor users should see no changes and can skip the update.
  • Developer updates include rkyv 0.8 (one-page serialization limit) and xous-ipc 0.10 (breaking changes, key regeneration, deprecations).
  • Refactors slim the OS and improve performance; a new Bao-1x target with 350MHz Vexriscv, 2 MiB RAM, 4 MiB FLASH, plus a VSCode plugin, aids onboarding.

Hottest takes

"I didn’t know the concept of ‘Warrant Canary’." — skywal_l
"Two cores and 22nm doesn’t scream performance…" — DeathArrow
"…BIO programmable IO system (similar to RPi’s PIO but open)" — IshKebab
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