keycode 0x76 = Num_Lock
keycode 0x77 = KP_Divide
keycode 0x7E = KP_Multiply
keycode 0x84 = KP_Subtract
keycode 0x7C = KP_Add 
keycode 0x57 = Linefeed
keycode 0x37 = F7
keycode 0x3F = F8
keycode 0x67 = Insert
keycode 0x64 = Delete
keycode 0x6E = Home
keycode 0x65 = End
keycode 0x6D = Next
keycode 0x6F = Prior
keycode 0x66 = BackSpace
keycode 0x47 = F9
keycode 0x4F = F10
keycode 0x56 = F11
keycode 0x5E = F12
keycode 0x2F = F6
