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Ask HN: Have you ever created a custom RISC-V ISA extension?

10•extensilica•2d ago
Curious about the real pain points, not the spec writing, but what came after: toolchain patches, simulator forks, getting someone else to reproduce your work.

Building a registry for reproducible extension packages: www.extensilica.com/wizard

Domain expertise has always been the real moat

https://www.brethorsting.com/blog/2026/05/domain-expertise-has-always-been-the-real-moat/
425•aaronbrethorst•9h ago•258 comments

A Gentle Introduction to Lattice-Based Cryptography [pdf]

https://cryptography101.ca/wp-content/uploads/lattice-based-cryptography.pdf
40•jayhoon•2d ago•0 comments

Ahoy, DECmate II the little PDP-8 that could

http://oldvcr.blogspot.com/2026/05/ahoy-decmate-ii-little-pdp-8-that-could.html
14•TMWNN•1h ago•0 comments

Shantell Sans (2023)

https://shantellsans.com/process
174•aleda145•7h ago•16 comments

Racket v9.2 is now available

https://blog.racket-lang.org/2026/05/racket-v9-2.html
79•spdegabrielle•2d ago•11 comments

Microsoft Office 2019 and 2021 for Mac view-only conversion

https://consumerrights.wiki/w/Microsoft_Office_2019_and_2021_for_Mac_view-only_conversion_(2026)
751•antipurist•6h ago•251 comments

I found a seashell in the middle of the desert

https://github.com/Hawzen/I-found-a-seashell-in-the-middle-of-the-desert
281•Hawzen•2d ago•72 comments

Accenture to acquire Ookla

https://newsroom.accenture.com/news/2026/accenture-to-acquire-ookla-to-strengthen-network-intelli...
266•Garbage•13h ago•132 comments

The AV2 Video Standard Has Released (Final v1.0 Specification)

https://av2.aomedia.org
109•ksec•8h ago•19 comments

Building a LangGraph pipeline for production data engineering

https://labyrinthanalyticsconsulting.com/blog/building-first-langgraph-pipeline
9•labyrinthAC•1h ago•0 comments

Voxel Space (2017)

https://s-macke.github.io/VoxelSpace/
269•davikr•15h ago•58 comments

Jef Raskin, the Visionary Behind the Mac (2013)

https://lowendmac.com/2013/jef-raskin-the-visionary-behind-the-mac/
94•tylerdane•10h ago•41 comments

wolfSSL releases a new product; wolfCOSE a zero alloc C embbedded COSE stack

https://github.com/wolfSSL/wolfCOSE
79•aidangarske•9h ago•14 comments

Zig ELF Linker Improvements Devlog

https://ziglang.org/devlog/2026/#2026-05-30
189•kristoff_it•12h ago•55 comments

Cheese Paper: a text editor specifically designed for writing

https://brie.gay/cheese-paper/
84•sohkamyung•7h ago•16 comments

Openrsync: An implementation of rsync, by the OpenBSD team

https://github.com/kristapsdz/openrsync
356•sph•19h ago•148 comments

Parallel Reconstruction of Lawful TLS Wiretapping

https://remyhax.xyz/posts/reproducing-lawful-tls-wiretapping/
79•jerrythegerbil•10h ago•38 comments

OpenRouter raises $113M Series B

https://openrouter.ai/announcements/series-b
395•freeCandy•12h ago•194 comments

Associative learning turns DEET from aversive to appetitive in Aedes aegypti

https://journals.biologists.com/jeb/article/229/10/jeb251935/371741/Associative-learning-switches...
3•croes•2d ago•0 comments

Gustav Klimt and Egon Schiele in Conversation (2018)

https://www.theparisreview.org/blog/2018/01/31/the-drawings-of-klimt-and-schiele/
33•rballpug•2d ago•4 comments

Pandoc Templates

https://pandoc-templates.org/
381•ankitg12•20h ago•50 comments

Show HN: 500 years of Joseon court omens as an observability dashboard

https://ajin.im/is/building/omen.ops/
100•poppypetalmask•10h ago•17 comments

Microcode inside the Intel 8087 floating-point chip: register exchange

https://www.righto.com/2026/05/microcode-inside-intel-8087-floating.html
102•pwg•12h ago•18 comments

Mechanical Pencin: A website about the hidden engineering in everyday objects

https://mechanical-pencil.com/
29•Muhammad523•5h ago•5 comments

Dusklight – GC Twilight Princess Decompiled

https://twilitrealm.dev/
87•shepherdjerred•9h ago•11 comments

Design Engineering Magazine

https://interfaces.dev/
77•hnhsh•9h ago•8 comments

Zig: Build System Reworked

https://ziglang.org/devlog/2026/#2026-05-26
338•tosh•21h ago•221 comments

90% of the T Distribution

https://entropicthoughts.com/ninety-percent-of-the-t-distribution
44•ibobev•3d ago•12 comments

Navier-Stokes fluid simulation explained with Godot game engine

https://myzopotamia.dev/navier-stokes-fluid-simulation-explained-with-godot
213•myzek•4d ago•25 comments

Leo's first encyclical attacks technological messianism

https://www.economist.com/europe/2026/05/28/leos-first-encyclical-attacks-technological-messianism
203•1vuio0pswjnm7•19h ago•243 comments