need interpretation of panic message?

[Webster Dove]

We have begun getting kernel bus errors at no consistant address.  Can
someone help us by interpreting the following?

Oct 22 11:07:07 peach vmunix: as: 
Oct 22 11:07:07 peach vmunix: trap address 0x8, pid 16156, pc = f07dc74, sr = 2004, stkfmt b, context 6
Oct 22 11:07:07 peach vmunix: Bus Error Reg 80<INVALID>
Oct 22 11:07:07 peach vmunix: data fault address a faultc 0 faultb 0 dfault 1 rw 1 size 0 fcode 5
Oct 22 11:07:07 peach vmunix: KERNEL MODE
Oct 22 11:07:07 peach vmunix: page map 0 pmgrp 8b
Oct 22 11:07:07 peach vmunix: D0-D7  0 0 5 0 436a8 1 0 2
Oct 22 11:07:07 peach vmunix: A0-A7  f0a3eec f2a0fae 2e 0 f0b8938 0 ffff9448 ffff9428
Oct 22 11:07:07 peach vmunix: Begin traceback...fp = ffff9448, sp = ffff9428