From Fedora Project Wiki
There are several keycodes defined in /usr/include/linux.input.h whos meaning is unclear. Leading KEY_ is ommitted.
Help wanted
102ND # between shift and z on European keyboards produces < > and German keyboard AB # A/B - Change source on settop box/video recorder ALTERASE # e.g. Eraze-Eaze(TM) Key ANGLE # switch to other camera position/ video stream ARCHIVE CONNECT DIGITS MACRO # modifier for application macros ISO LIST # list TV channels POWER2 # on remote control, difference to POWER? QUESTION TEEN # 1- TWEN # 2- RED GREEN YELLOW BLUE # Video text navigation/ general purpose buttons