On Tue, Mar 29, 2005 at 09:29:06PM -0800, Justin Walsh wrote: > > Or what is the definitive Blue Book on: > 1. Bios in General? > 3. Bios in particular?
I'm not sure there is one. Traditionally BIOS code seem to have been a secret well-kept by mainboard/BIOS companies. > 3. How does one switch a 686 or 786 from native into real mode? > i.e. 286 emulation? x86 CPUs start up in a backwards-compatible 8086 real mode. Protected mode is entered by setting bit 0 in the cr0 register, but first some descriptor tables need to be set up. Switching back and forth basically is a matter of flipping the PE bit. //Peter _______________________________________________ LinuxBIOS mailing list [email protected] http://www.openbios.org/mailman/listinfo/linuxbios
