The x86_64 DOS hole

oooooooooooohhhhhhhhhhhhhh!!!!!!!!!!!! It all clicks into place now, I was thinking it was some issue to do with the initial 16bit mode that the system boots up into before switching over to 32/64bit and read the article effectively as a seperate entity to the title as it's obviously nothing to do with that *lol* I hadn't even conscously realised I'd done it but yeah... makes sense now even if I didn't realise it wasn't making sense before. Gotta love how brains work.