Palawan's USB Stack is Now Known as Grainuum The USB stack from project Palawan has grown beyond its original scope. The bootloader contains a completely separate copy, and it has been ported to at least one other platform. It is confusing to refer to both the hardware platform and the USB stack as “Palawan”. To help alleviate confusion and help the the projects stand on their own, the USB stack will be broken out into its own project and renamed Grainuum.