help about boot code

[fretre]

1. I try to learn something about boot code with
   version 3.0. I wander whether I can begin with
   biosboot?(/usr/src/sys/i386/boot/biosboot)
2. The intialized data will be loaded into memory
   after kernel text during boot stage, and where
   is the file that the initialized data is defined
   in? and
3. What's the file name?

                        Thanks a lot from Fre Tre
                        <fre...@163.net>