Or what is the definitive Blue Book on: 1. Bios in General? 3. Bios in particular? 3. How does one switch a 686 or 786 from native into real mode? i.e. 286 emulation? Thanks JW http://en.wikipedia.org/wiki/BIOS Google Search on Bios: http://www.google.com.au/search?hl=en&q=Bios&btnG=Google+Search&meta=