chain-load is the mechanism for loading unsupported operating systems by loading another boot loader. It is typically used for loading DOS or Windows.
The NetBSD/i386 kernel is Multiboot-compliant, but lacks support for Multiboot modules.
Only CRC32 data integrity check is supported (xz default is CRC64 so one should use –check=crc32 option). LZMA BCJ filters are supported.
There are a few pathological cases where loading a very badly organized ELF kernel might take longer, but in practice this never happen.
The LInux LOader, a boot loader that everybody uses, but nobody likes.
El Torito is a specification for bootable CD using BIOS functions.
Currently a backslash-newline pair within a variable name is not handled properly, so use this feature with some care.
However, this behavior will be changed in the future version, in a user-invisible way.