At least I presume you are. For all I know there is some robogenius out there who programmed his own OS and is having this forum imprinted directly through hardward into his mind.
A guy in my Assembly class (Motto: "Fifth time's the charm!") found a link to an OS written completely in Assembly. It fits neatly on a floppy disk.
Menuet OS!
Of note is the fact that Dosbox got ported to it. To wit:
Apparently 3D Maze, SETUP and DENNIS were all ported.
If not for the fact that I don't actually have a floppy disk hooked up to my other PC (Motto: Help me I'm Stolen from Work!!!) I would give this a test drive and maybe actually play Manic Mansion, which I would have liked to have done for almot 20 years now.
Download the fun!