login: nmi interrupt received
Stopped at      _Debugger+0x6:  unlk    a6
db> help
machine     print       examine     x           search      set         write
w           delete      d           break       dwatch      watch       step
s           continue    c           until       next        match       trace
call        ps          callout     show
db> machine halt

MEMORY ERROR!  Status D4, DVMA-BIT 0, Context 7,
  Vaddr: 58000, Paddr: 00238000, Type 0 at 0x0E08F2CC.
>

  I see. This used to happen now and then under SunOS. I never did
nail it down, or figure out if it really was a memory error or a
decoder error.

  Can anyone help? The machine passes the self test as well.