Fn+esc and Fn+F1 Produce the same scancode

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http://www.linuxquestions.org – My bios seems to produce the exact same scancodes. This it true for both Windows and Linux of course, It's an compaq presario CQ60-300eo and HP have drivers for those special fn-keys (for windows...). Now I wonder what alternative for using scancodes could HP be using? Another variable in bios/windows-drivers must be available because, I tried out those drivers in windows. (Fn+esc) calls a program created by hp that displays some hardware information. (Fn+F1) calls the "windows help manual program" and there is a (?)sign on the F1 button. How could this be? and how could I make linux (HowTos)