Updating motherboard BIOS without MS Windows

Hello all,

Maybe not the best mailing to ask it but...

How do you update BIOS without Windows since most brands only have bios
software to windows?

I'm about to buy a new pc without windows license and I'm looking for
brands that have bios-cli that work in FreeBSD.

Thanks,

-- 
Nuno Teixeira
FreeBSD Committer (ports)