http://www.dostips.com/forum/viewtopic.php?f=3&t=6137
http://ss64.org/viewtopic.php?id=1950

http://ss64.com/nt/syntax-variables.html

Firmware_type is undocumented variable available form widnsows 8 and above.It describes how the bios is loaded.
Possible values: Legacy ,UEFI,Not implemented ,Unknown


