I Can't find any good manual/reference about BTX bootloader integrated into FreeBSD. Especially I would like to know:
- if it's functionality resembles GRUB 2. For example, if it can boot OS other than FreeBSD
- how to edit it's boot menu, what options are available
- how to use it's command line ( I know there is help in command line, but it's very base )
- how to 'troubleshoot'
Do you know any good resources ?