"root" has come to mean "unrestricted access", e.g. "to root" = "to gain unrestricted access". In this case, it most likely refers to a network connected hardwa

"root" has come to mean "unrestricted access", e.g. "to root" = "to gain unrestricted access". In this case, it most likely refers to a network connected hardware subsystem that can pause the main CPU and access its state freely.