While specific steps vary by model, the process generally follows one of two paths.
In the late 90s, a small tech start-up called won a massive, quiet contract to build the firmware for a line of high-end, proprietary industrial controllers. Their code, simply titled Gordgelin_FW_v1.0 , was designed to be "self-healing"—software that could rewrite its own logic to bypass hardware failures. gordgelin firmware