+20120413:
+ Boot loader menu now has an option to boot into single user mode. To
+ get the menu option do:
+
+ # cp /usr/src/etc/boot.cfg.default /etc
+ # update_bootcfg
+
20120402:
an installed genassym is required to build the kernel:
# make -C usr.bin/genassym install
default=2
menu=Start MINIX 3:load_mods /boot/minix_default/mod*;multiboot /boot/minix_default/kernel rootdevname=$rootdevname
menu=Start latest MINIX 3:load_mods /boot/minix_latest/mod*;multiboot /boot/minix_latest/kernel rootdevname=$rootdevname
+menu=Start latest MINIX 3 in single user mode:load_mods /boot/minix_latest/mod*;multiboot /boot/minix_latest/kernel rootdevname=$rootdevname bootopts=-s
menu=Drop to boot prompt:prompt