My own 32bit x86 OS development experiment, named SIMPL-UX because it's simple, loads from a single floppy drive (1.44MB) and kernel + shell/utils is about 256kB of storage and offers PMODE, paged memory management, user management and multi-user access to fights protected sessions and file system, vga and tty manipulations and a lot of POSIX1 compatibility out of the box, written 100% in assembly, compiled with NASM is dynamically approaching v0.5 milestone.
it's huge learning. I'm working now to expand the file system to HDD discovery and formatting, dynamic libraries and simple assembler that can build apps inside it. that with some nominal support to VESA backed graphics mode and direct access as dynamic library and device drivers and that will coin that version.
It's still just internal R&D to educate myself a bit of historic effort related to OS development, targeting tech stack from the end of 90s. offline, no networking stack available yet.
Internal R&D but tremendously fun!






