Pear OS has had a bit of history. It started out as a Debian-based Linux distribution called Pear OS. Then, out of nowhere, it was renamed Comice OS. The rename gremlins struck again, and it was back ...
The old Linux kernel source version 0.11 and the integrated experiment environment. CS630 Qemu Lab is a related project, it is a friendly learning environment for the X86 assembly course: CS630.