Emacs-riscv
A RISC-V emulator written in Emacs Lisp
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Hi HN,This is a small RISC-V emulator I’ve been hacking on in Emacs Lisp as a fun weekend project.It started mostly as a way to better understand the RISC-V spec by implementing things myself, and also as an excuse to write more non-trivial Emacs Lisp. It currently focuses on RV32I and related basics, and is very much not optimized or production-ready.If you’re into RISC-V, emulators, or just enjoy seeing unusual things built in Emacs Lisp, feedback and comments are welcomeHappy hacking!
HN · launched Jan 5, 2026 · 10 upvotes (top 50%) · 0 views
Niche: software and system emulators · 114 launches, 3 in the last 7 days ▼ -70% · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 114 launches in software and system emulators →
Could you build this?
Yes An RV32I RISC-V CPU emulator is a well-documented instruction-decode-and-execute loop that AI code generators can readily write in Emacs Lisp.
Discussion
No comments on this launch.
Competitors
Other products that read as similar to this one : 70 launches clear the similarity bar, closest 8 shown.
Attention rank: #40 of 71 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 67 days after the earliest competitor.
- nix-riscv · github · 2026-09-14 · 17 upvotes · similarity 0.49
- Elecxzy · hn · 2026-02-21 · 22 upvotes · similarity 0.48
- Porting xv6 to HiFive Unmatched board · hn · 2026-01-10 · 26 upvotes · similarity 0.46
- I wrote a technical history book on Lisp · hn · 2026-02-17 · 252 upvotes · similarity 0.46
- I forced Claude to play Tetris in Emacs · hn · 2026-04-11 · 13 upvotes · similarity 0.43
- I built a RISC-V emulator that runs DOOM · hn · 2026-05-03 · 50 upvotes · similarity 0.40
- Metaspec: The DpANS3R Common Lisp Spec in S-Expr and HTML Format · hn · 2026-06-24 · 17 upvotes · similarity 0.40
- RISCY-V02: A 16-bit 2-cycle RISC-V-ish CPU in the 6502 footprint · hn · 2026-03-06 · 7 upvotes · similarity 0.40
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