I would like to create a keyboard-layout for dosbox running on the OpenPandora-handheld (http://www.open-pandora.org/), which runs an ARM-Linux. The layout looks like this: http://pandorawiki.org/File:Pandkey.png
As you can see on that URL, there are several characters, which have to be typed by using a different key-combination than on a normal PC-keyboard. For example the exclamation-mark should appear when pressing Fn+t and not by pressing shift+1.

I tried to find information on how to create such a keyboard-map myself, but I got stuck somewhere on the way. As far as I understood I have to set a keymap like described here: http://www.dosbox.com/DOSBoxManual.html#KeyboardLayout, after either implementing my own layout into the dosbox-source-code or by using the keyb.exe-command after setting up one of the mentioned external files. I just didn't find instructions how to achieve this. Did I get it right that I don't need a new codepage (as i do not want to add new symbols), but just need a new layout-file? Could someone help me with a rather detailed instructions? I'm not much into coding or software-hacking, but fiddled around with Linux-OSes for several years by now.