This blog forms part of the http://performanceGuru.com website which focuses on performance tuning UNIX-like Operating Systems (including Linux).
Sun have released a new blueprint
detailing the x86 boot process. From the introduction:
This article explains the mechanics of the boot process on the Solaris Operating System for x86 platforms so that you understand what is needed to create a customized CD/DVD. It discusses both the hard disk and CD/DVD boot processes, and points out the differences between the two.
If your involved in creating builds, etc for Solaris x86 this is a worthwhile read.