A z80 kernel and a collection of programs, tools and documentation that allows you to assemble an OS that can:

• Run on minimal and improvised machines.
• Interface through improvised means (serial, keyboard, display).
• Edit text files.
• Compile assembler source files for a wide range of MCUs and CPUs.
• Read and write from a wide range of storage devices.
• Replicate itself.

Additionally, the goal of this project is to be as self-contained as possible. With a copy of this project, a capable and creative person should be able to manage to build and install Collapse OS without external resources (i.e. internet) on a machine of her design, built from scavenged parts with low-tech tools.

Github: https://github.com/hsoft/collapseos