start up with key combination

[barca1234]

Hey guys,

i have a question about bios and security. My cousin is a bit of a pc geek and has done all sorts of things to his bios, OS, etc. One thing that got my attention was the fact that his PC can only be turned on after a certain (set by him) key combination on the keyboard is entered, i.e. Enter + 1234 + Enter. He said that he did this through his BIOS. I wanted to do that to my pc as well, but when I entered my BIOS I couldn't find this kind of option, only passwords which would be required after the system is turned on.

I would like to know whether all PCs can do that, and if that is the case, how to do it.

thanks in advance