URI: 

RESERV OPL4 (YMF278B).pdf
       ________________________________________________________________
       "The idea that I can be presented with a problem, set out to
        logically solve it with the tools at hand, and wind up with a
        program that could not be legally used because someone else
        followed the same logical steps some years ago and filed for a
        patent on it is horrifying."                 -- John Carmack