ppc install problem

[Jason]

Hello,

I attempt to boot the ppc 7.2 install cd on a G4 Tower (Yikes!, I believe).
It gets past open firmware without problem.  It enters the normal boot
process for FreeBSD.  It starts loading drivers, and it fails on loading
bmac.  It says that it is failing to initialize the hardware.  Then, the
machine freezes.

Do you know what piece of hardware bmac is initing, and can you imagine what
the problem might be?  Has anyone else encountered this?

-Jason