Dozens of minimal operating systems to learn x86 system programming. Tested on Ubuntu 17.10 host in QEMU 2.10 and real hardware. Userland cheat at: https://github.com/cirosantilli/linux-kernel-module-cheat#userland-assembly ARM baremetal setup at: https://github.com/cirosantilli/linux-kernel-module-cheat#baremetal-setup