mikema: where ever you reference is from (give the link.........otherwise its plagerism of sorts) , im inclined not to believe it.

if you think about it logically the bios enables you to boot from where ever the memory addresses within it say so, be it a harddisk or a NIC.

NIC's have there own memory which can contain binarys to enable network booting, this eprom is more than useable as a storage location for any malicous code. sure its not on bios but I think the bios can contain spare memory (forgotten the location) so small code could easily be stored.

If been messing about with the bios on a computer for a bit and im just trying to reverse engineer the program flashcd, its an iso that puts itself into the boot sector of a CD, quite interesting.