5.3 cd installation panic

[Cyril Tikhomiroff]

Hello,

When i boot a minimal 5.3 installation CD on my Ultra 30 station, i got
a kernel panic:

Sun Ultra 30 UPA/PCI (UltraSPARC-II 296MHz), No Keyboard
OpenBoot 3.11, 512 MB memory installed, Serial #10115596.
Ethernet address 8:0:20:9a:5a:c, Host ID: 809a5a0c.

ok
ok boot cdrom
Boot device: /pci at 1f,4000/scsi at 3/disk at 6,0:f  File and args:

>> FreeBSD/sparc64 boot block
   Boot path:   /pci at 1f,4000/scsi at 3/disk at 6,0:f
   Boot loader: /boot/loader
Console: Open Firmware console
Boot path set to /pci at 1f,4000/scsi at 3/disk at 6,0:a

FreeBSD/sparc64 bootstrap loader, Revision 1.0
(root at bobbi.cse.buffalo.edu, Fri Nov  5 02:16:10 UTC 2004)
bootpath="/pci at 1f,4000/scsi at 3/disk at 6,0:a"
Loading /boot/defaults/loader.conf
/boot/kernel/kernel data=0x3b5f08+0x49e28 syms=[0x8+0x4ef60+0x8+0x43746]
|
Hit [Enter] to boot immediately, or any other key for command prompt.
Booting [/boot/kernel/kernel]...
nothing to autoload yet.
jumping to kernel entry at 0xc0040000.
stray vector interrupt 2029
Copyright (c) 1992-2004 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
FreeBSD 5.3-RELEASE #0: Fri Nov  5 19:30:40 UTC 2004
    root at bobbi.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC
Timecounter "tick" frequency 296001375 Hz quality 1000
real memory  = 536870912 (512 MB)
avail memory = 482910208 (460 MB)
cpu0: Sun Microsystems UltraSparc-II Processor (296.00 MHz CPU)
nexus0: <Open Firmware Nexus device>
pcib0: <U2P UPA-PCI bridge> on nexus0
pcib0: Psycho, impl 0, version 4, ign 0x7c0, bus B
pcib0: [FAST]
pcib0: [GIANT-LOCKED]
pcib0: [FAST]
pcib0: [GIANT-LOCKED]
pcib0: [FAST]
initializing counter-timer
Timecounter "counter-timer" frequency 1000000 Hz quality 100
pcib0 dvma: DVMA map: 0xfc000000 to 0xffffffff
pci0: <OFW PCI bus> on pcib0
panic: ofw_pci_attach: OF_getprop failed
cpuid = 0
Uptime: 1s
Automatic reboot in 15 seconds - press a key on the console to abort

I have a PCI sun network card in the box.

What can i do to boot the installation CD ?

Do I have to upgrade the Openboot firmware ?

Cyril Tikhomiroff