This section contains concepts that depend only on the CPU, but that cannot be tested on userland because they'd require ring 0.
Examples:
- real mode concepts. Userland cannot switch to real mode.
- segment registers.
This section does not include concepts that depend on hardware other than the CPU itself, e.g. BIOS.
Concepts that can be tested from userland will be tested at: https://github.com/cirosantilli/assembly-cheat