From the lyrics:
Give me alchemy,
give me wizardry,
Give me sorcery, thermatology
Electricity, Magic if you please,
Master all of these, Bring him to his knees
http://www.azlyrics.com/lyrics/megadeth/fivemagics.html I really hope it's Wizardry 1-5, because combined with the song title "5" magics it would be a really waste of an perfect hint for it ;-) Btw, Matt Barton did an interview with Robert Sirotek a while ago. He said that he has the rights for Wizardry 1-5, so I guess a release is possible.
DCT: If it does turn out to be Wizardry 1-5. For the love of all that is holy and unholy please GOG team set the Dosbox configs to CGA mode(machine=CGA) so the games don't display that god awful shades of purple(setting it to CGA mode forces Wizardry 1-5 to use a alternate set of CGA colours)..
Wow, that's amazing. Will need to check this with other old cga-games.