Many the moves are different than the arcade version. Pretty well all of the moves can be used with the Sega-CD version of Dragon's Lair also. So here they are. I've tried to include as much timing references as possible. If the move doesn't seem to be working, try different timing.
Some moves have very exact timing.
Suddenly, the room starts to crumble and fall apart. Dirk will cover his eyes and start to sway towards the crevasse towards the left. Dirk will automatically jump forwards in the room. Dirk is in a room full of mist. A snake will almost get you.