there was a bug in realemu causing vesa graphics initialization
to fail on newer versions of virtual box >= 4.2.
a new iso is available:
http://r-36.net/9front/9front-2075.77a1d3a7080e.iso.bz2.torrent
http://r-36.net/9front/9front-2075.77a1d3a7080e.iso.bz2
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cinap