[9204] in Athena Bugs
RT machine check with wedge, without reboot.
daemon@ATHENA.MIT.EDU (Mark W. Eichin)
Mon Apr 13 22:04:56 1992
Date: Mon, 13 Apr 92 22:04:44 -0400
From: "Mark W. Eichin" <eichin@Athena.MIT.EDU>
To: bugs@Athena.MIT.EDU
I was just starting to log in on portnoy; the console window was still
up. Suddenly, I saw the following message in the console:
machine check in user mode...
machine check: mcs_pcs=0x800300<MACHINE-CHECK, IO-TRAP, USER>,
info=0x0, iar=0x703e, ics_cs=0xe870018<CHKSTOP-MASK, XLATE,
USER, STG-PROT>
csr=220000ff
R0...R3: 0000 0073 1fff 9148 1fff 917c 0000 03f7
R4...R7: 1000 374c 1001 2013 007f ffb0 0000 0000
R8...Rb: 1000 f788 0000 0002 1fff a1f0 1fff 917c
Rc...Rf: 000b 5182 1fff 99b8 1fff 9185 0000 07ed
SER=408 <PAGE-FAULT, CORRECTABLE-ECC>
SEAR=6be044 TRAR=7cd800 TCR=107f<TLIPT> HAT/IPT=7f
msreset: coldn't set resolution
keyboard init done.
psp init done.
Then the LED's went to "94", the system stopped responding to mouse
and keyboard, and stopped responding to ping as well.
The above data is copied by hand; although it appeared in the console
window, I can't find any evidence of it on disk... the reboot happened
around 2103 13April1992, if that helps you find it on wslogger.
[The reason I'm sending this to bugs is that I remember changes being
made that changed the way the RT responded to a machine check (ie.
just log it, don't panic, if the machine is in user mode) and that
this seems to be a case where the machine still wedged...]
_Mark_ <eichin@athena.mit.edu>
MIT Student Information Processing Board
