[sgt]

Correct me if I am wrong. Isn't it likely that you would create a quick bootloader in the 512 byte long boot-sector, and then load this Itsy-OS from storage (e.g. flash, ROM, etc). Ofcourse it would require the bootloader to be written...

[DrJokepu]

Normally you would be right but I think since we're talking about kernel code golf here, it's only fair to consider the bootloader (if there's any) as part of the kernel.