The "btc9000a" key definition in /usr/X11R6/lib/X11/xkb/symbols/inet is wrong -
the keys really output different codes.  The bug is present both in
xorg-x11-6.8.2 and in the latest version at
http://cvs.freedesktop.org/xlibs/xkbdesc/symbols/inet?rev=1.11&view=markup .

This is the working definition (if a 2.6.x kernel is used, the atkbd.softraw=0
boot parameter is required, otherwise the Help, XF86Start and XF86Eject keys
don't work):

partial alphanumeric_keys
xkb_symbols "btc9000a" {
    name[Group1]= "BTC 9000A";

    key <I5E>   {       [ XF86PowerOff          ]       };
    key <I5F>   {       [ XF86Standby           ]       };
    key <I63>   {       [ XF86WakeUp            ]       };
    key <I25>	{	[ Help			]	};

    key <I66>   {       [ XF86Favorites         ]       };
    key <I32>   {       [ XF86WWW               ]       };
    key <I65>   {       [ XF86Search            ]       };
    key <I26>   {       [ XF86Start             ]       };

    key <I30>   {       [ XF86AudioRaiseVolume  ]       };
    key <I2E>   {       [ XF86AudioLowerVolume  ]       };
    key <I20>   {       [ XF86AudioMute         ]       };

    key <I22>   {       [ XF86AudioPlay, XF86AudioPause ] };
    key <I10>   {       [ XF86AudioPrev         ]       };
    key <I19>   {       [ XF86AudioNext         ]       };
    key <I24>   {       [ XF86AudioStop         ]       };
    key <I33>   {       [ XF86Eject             ]       };
};

BTW, the codes are the same as in the "btc5090" definition, except the Help key,
which is not present in btc5090.