0xB9 brightnessup # does nothing in BIOS
0xBA brightnessdown # does nothing in BIOS
0xF1 camera # BIOS toggles camera power
-0xf2 unknown # trackpad enable/disable (does nothing in BIOS)
+0xf2 f21 # touchpad toggle (key alternately emits f2 and f3)
+0xf3 f21