CD boot fails (Decrementer exception)

[Ross Gohlke]

I am finally getting around to the Xserve installation I asked about
previously:
FreeBSD 7.0-RELEASE installer CD (burned on an iBook a month ago)
Xserve G4 Dual 1GHz
Following these instructions:
http://people.freebsd.org/~grehan/iso_install.txt

Boot holding down 'c' does not work.
Boot into Open Firmware (hold down Cmd-Opt-o-f) and issue:
0 > boot cd:,\boot\loader cd:0

OF finishes loading, then reports:
Decrementer exception at %SRR0: 0035fc04   %SRR1: 00002032
 ok
0 >

Any ideas how I can fix this? Thanks.

Ross Gohlke