I use a Norwegian keyboard, which is similliar to your keyboard.
To enter dungeons or go down, press
: and to get back up it is
;. The online help is
_.... hmm, what else....
( would be the random race decider when generating a new character...
What I would propose you do, is simply go nuts in DOSBox and type your brain out. You'll see which buttons are which, then. That was what I had to do. And don't worry, it's only a couple of keys you'll need to learn that way
Edit:
But I think there is also a keymapper installed in ADOM. Might wanna give that a try