coreboot has ACPI while 2 others don't. *BSD need ACPI and have trouble without it. Don't even attempt to boot *BSD on multiboot or qemu targets. On coreboot boot all *BSD except 32-bit NetBSD which apparently does some early BIOS calls.
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'
Description
Languages
C
82.5%
Assembly
13.6%
M4
1.4%
Shell
1.3%
Makefile
0.5%
Other
0.5%