crashed alpha, strange error message

hi,

my UP1000 recently crashed, or to be more exact it stopped answering SSH
and SMTP requests while still responding to HTTP and ping. unable to
access the machine, i rebooted it, but it didn't come back up again.

now i've tried various boot options to get something running, booting (SRM
and aboot) off floppy as well as disk, but the kernel doesn't seem to
start up at all. all i get is, when booting from disk, this message on
the console (serial, no graphics card on this machine):

TU PCI Bus Error :CSR5: ffffffff

repeated ad infinitum.

any ideas what might have happened? the only pci hardware on the machine
is the tulip nic and Adaptec scsi-controller, which have both been
flawless in the past.

thanks in advance for any help or ideas,

/m

ps running SuSE 7.3