PonyDOS is a text pseudo-graphics based operating system for everypony. PonyDOS includes a bespoke 512 byte kernel, event-loop based multitasking, and – most important of all – a pony wallpaper out of the box
source code and ready-to-run floppy images are available at the release page
confused? check out PonyOS
You better keep this available until I can get an old dos rig in my hands again, I will so run this on it.
