This is a self-hosting, from scratch x86 operating system I am writing in my free time. It was hand-bootstrapped, and has never been assembled or compiled with existing tools. I am maintaining a "genesis chain" so the current master branch can always be built (indirectly) by my hand-assembled binaries.

I use a ThinkPad T30 to develop the operating system. It's an old machine but it has several useful features like a 4:3 display, a floppy disk drive, and a real serial port.