cpm operating-systems developer-tools open-source

CP/M-386 – CP/M for 386 protected mode, derived from CP/M‑68K

github.com

August 3, 2026

7 min read

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50/100

Summary

CP/M-386 is an early development project that implements CP/M for 386 protected mode, derived from CP/M-68K. It features a full 32-bit protected mode implementation, bootable via 3.5" 1.44MB floppy disk MBR or GRUB Multiboot kernel, and supports VGA.

Key Takeaways

CP/M-386 is a new operating system for 386 protected mode, derived from CP/M-68K, currently in early development stages.
The system supports 32-bit protected mode with a bootable floppy disk or GRUB Multiboot kernel and is compatible with 386 systems with 2MB or more memory.
CP/M-386 achieves full parity with CP/M-68K 1.3 and CP/M 2.2, with additional support for a majority of CP/M-Plus and DOS-Plus features.
Compilation of CP/M-386 requires specific dependencies including GNU GCC or LLVM Clang, and it is verified to build on current releases of NetBSD, FreeBSD, and various Linux distributions.

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Coverage & discussions

Hacker News · github.com

CP/M-386 – CP/M for 386 protected mode, derived from CP/M‑68K ↗

Community discussions

Hacker News discussion ↗

Historical count: 5 · 5 saved in sample · Historical sample

Analysis ready

Community Sentiment

Mixed

Positives

First project of this kind on here in a long while that isn't complete AI slop. Well done, really happy to see some people still doing this!
I was a bit shocked to run across the 'no AI generated code is in this code base yet', which makes it much more impressive.

Concerns