You can get a comprehensive DADGAD chord chart pdf by pasting this into a google search box- benfarmer.co.uk › wp-content › uploads › 2012/07 › Dadgad.

I play Donal Og in Dropped-D after the Tony MacManus version. Tried it in DADGAD but couldn't make it work. The chords used are basically just D G Bm and A.