What was done - VM bringup Our user-friendly GREEN LED illuminated the way through initarm() and sub routines as we boot-strapped the VM system and mapped the physical memory spaces Apart from the kernel image and free space in RAM, essential register spaces such as the GPIO controller interrupt controller "SCOOP"s are mapped at fixed virtual addresses Because we call their drivers before the VM system is fully operational, e.g. to attach the serial driver com(4)