Re: Information about BIOS and the boot process

[Ivan Gustavo]

ron minnich wrote:
> On Fri, 28 Mar 2003, SONE Takeshi wrote:
> > CPU starts with last 16 byte of address space.
> > On a 386 or later it's FFFFFFF:0000??
>
> CPU starts out in "big real mode" at 0xffff0000,

Tanks :)

But, other ask... Ok , the CS point to the last accessible segment, and
IP to the  last addess less  16 bytes...
What I do not understand is, how the bios data go to there  (may be
funny to you, so I dont find nothing documentation about)...
I ask it because a common bios have 256k and the segment which the
processor point is  752Kbytes far...
... so I guess I am not imagining right.
> and most BIOSes (linuxbios too) do a jump cs:ip to 0xf000:0x0, which

pops the CPU into the
> old 8086 real mode.
>
> kron