info-vax (06/09/82)
>From sdcsvax!philabs!jgc@Berkeley Tue Jun 8 21:33:17 1982
Has anyone had any experiences with the following
hardware fault on an 11/780.
We run 4.1bsd on an 11/780 with 2 meg,
2 RP06's, 2 Able DH/DM's, 2 DEC DZ11's.
problem:
cpu halts console spews :
?INT-STK INVALID
HALTED AT 8000xxxx
\ \
-------- random address
Problems is independent of system load, occurs
only with UNIX. DEC diagnostics find nothing.
Page 40 of VAX hardware manual mentions error under
"serious system failures."
jim constantine
philips labsinfo-vax (06/09/82)
>From Hedberg@SUMEX-AIM Wed Jun 9 12:10:26 1982
I had exactly the same problem. It occurred in spurts, say 4 times in
one day then nothing for several weeks. Diagnostics found nothing.
I called my friendly DEC service manager and got the following instructions
from him to get more info for field service:
Run with auto-restart OFF, when it dies type this on the console:
EX SP (Examine the Stack Pointer)
EX/V @/N:100 (And 100 locations on the stack(?))
EX 20003000/N:3 (Then the memory controller regs.)
EX 18 (The SBI Silo)
EX 1B (And SBI Fault)
Luckily for me, it crashed one day while I was in the machine room.
I slapped in "MICRO DIAG #1" as fast as I could and it found a bad
board (M8227). It was replaced and I haven't seen the problem since
(that was May 11, keep your fingers crossed). I never used the above
instructions so I cannot vouch for them.
If you want to talk more you can mail to me at ucbvax!Shasta!hedberg
or call (415)497-5294.
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