RISC-V core written in 600 lines of C89
32-bit RISC-V CPU in ~800 lines of C89. Contribute to mnurzia/rv development by creating an account on GitHub.
RISC-V core written in 600 lines of C89 launched on June 10, 2023 with 190 votes, #182 of 4,655 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 3 years on.
In plain words
This is a minimal RISC-V processor core implemented in just 600 lines of C89 code. It's designed for developers and hobbyists interested in understanding how processor architecture works or experimenting with RISC-V systems. The project stands out for its simplicity and compact implementation, making it accessible for learning purposes without the complexity of full-featured cores.
written from the facts on this page · September 2026
Does a similar job
all alternatives →- ARA RISC-V core in Racket2021 · guillaume.baierouge.fr · ▲122
A pipelined RISC-V processor written in VHDL2015 · github.com · ▲65A pipelined RISCV implementation in VHDL. Contribute to inforichland/freezing-spice development by creating an account on GitHub.
Minimax – A Compressed-First, Microcoded RISC-V CPU2022 · github.com · ▲171RISC-V's compressed instruction (RVC) extension is intended as an add-on to the regular, 32-bit instruction set, not a replacement or competitor. Its designers intended RVC instructions to be expanded into regular 32-bit RV32I equivalents via a pre-decoder. What happens if we explicitly architect a RISC-V CPU to execute RVC instructions, and "mop up" any RV32I instructions that aren't convenient via a microcode layer? What architectural optimizations are unlocked as a result? "Minimax" is an experimental RISC-V implementation intended to establish if an RVC-optimized CPU is, in practice, any…
RISC-V disassembler in 200 lines of C2020 · github.com · ▲29A minimal RISC-V RV32I disassembler. Contribute to andportnoy/riscv-disassembler development by creating an account on GitHub.
I wrote an OS in 1000 lines of Zig2025 · github.com · ▲151A minimal RISC-V 32-bit OS written in Zig. Contribute to botirkhaltaev/pico-os development by creating an account on GitHub.
IDE for Learning RISC-V2019 · github.com · ▲105RARS -- RISC-V Assembler and Runtime Simulator. Contribute to TheThirdOne/rars development by creating an account on GitHub.
More dev tools this month
the category →
Contribute to oosexgang/hackios-xnu-kernel development by creating an account on GitHub.
Dev tools · 1d ago · github.com


open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.
Dev tools · 29d ago · github.com

Contribute to reladraw/reladraw development by creating an account on GitHub.
Dev tools · 27d ago · github.com
OpenBot▲362Grok Bot alternative: free, local, open-source, multiplayer
Dev tools · 25d ago · openbot.run
Talanoa▲346Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…
Dev tools · 22d ago · talanoa.email
Source: Show HN post ↗
Launched alongside, June 2023
the whole month →
Heya HN, I've been working on a reddit-like platform as my primary side project for the last few years. Doing a (very) soft launch today, mainly because I want to use it to encourage discussion of alternatives. How non.io works: 1. Free to browse, paid to interact. 2. Minimum subscription is $2 (though you can choose more). I take $1 to run the servers, everything left gets split evenly between everything you upvote that month. It's a simple model, but I hope it's a better one than the freemium model we've been relying on for the last few years. Fundamentally I feel like any ad-supported…
Commerce · 2023 · non.io

Typefully 2.0▲931Effortlessly publish on Twitter and LinkedIn, now with AI
Growth · 2023 · typefully.com

SlashPage▲755Create websites in seconds to build your first 1K community
Growth · 2023 · slashpage.com

Easy to use AI-powered, drag-and-drop website, SAAS landing, directory, and blog builder for startups, mobile apps, and SaaS. 100% no code, no design skills needed.
AI · 2023 · unicornplatform.com