[9fans] plan9 won't install on my system

[elot]

hey,i have an intel core 2 duo CPU E7300 with an ASUS motherboard and
an nvidia 8500GT/PCI/SSE2 graphic card.i tried to install plan9 but it
stops at a part that says irq 3 routing and wont even bring up the
boot options.i looked at the list of supported hardware and i've been
on the freenodes but no luck.what could be wrong?