panic in boot loader

Help!

We had a power outage, and when I brought my system (Solaris 10 3/05)
up, it would come only boot in single user mode, suggesting that i
could (with some risks) use svcadmin to clear the boot archive (i
can't remember the exact command). I did, and now the kernel won't
even load. Now I get:

[probably some stuff that scrolls by too fast to read]
cannot read biosint
trap type 13 (0xd) err code 0x98b8 eip=0x0
[bunch of register and stack trace data]
panic: unexpected trap in boot loader
Press any key to reboot

any help would be greatly appreciated!

long time after the fact, but thought I would post the fix that worked best for me so others could find a solution...

1. boot into failsafe mode; #mounting the drive read/write as /a
2. cd /a/platform/i86pc ; mv boot_archive boot_archive_bad
3. cd /
4. bootadm update-archive -R /a
5. shutdown -i 6

basically, the ramdisk profile has somehow gotten munged, so you need to get a new one :)

many thanks to all the data on the web that was able to point me in the right direction... web sites that I found are listed below:

[url=http://www.sun.drydog.com/faq/7.html]7. Troubleshooting (Solaris x86 FAQ)[/url]
[url=http://flux.org.uk/howto/solaris/fix_boot_archive]Fixing a Solaris Boot Archive | Flux[/url]
[url=http://www.sun.com/bigadmin/features/articles/grub_boot_solaris.jsp]BigAdmin Feature Article: GRUB and the Solaris 10 1/06 OS: The New Bootloader for x86 Platforms[/url]

-swc