Path: utzoo!utgpu!water!watmath!clyde!bellcore!faline!thumper!ulysses!andante!princeton!udel!gatech!sbmsg1!scbhq!jmk
From: jmk@scbhq.UUCP
Newsgroups: comp.sys.dec
Subject: Re: What does this message mean?
Summary: possible memory problem
Keywords: machine check, MicroVAX
Message-ID: <641@scbhq.UUCP>
Date: 12 May 88 19:05:39 GMT
References: <780@acornrc.UUCP>
Organization: South Central Bell, Birmingham, AL
Lines: 24
Posted: Thu May 12 15:05:39 1988

In article <780@acornrc.UUCP>, bob@acornrc.UUCP (Bob Weissman) writes:
> Can someone help decipher this message from a MicroVAX II running
> 4.3 BSD?
> 
> May  8 21:33:53 acornrc vmunix: machine check 80: vap 7fffe594 istate 10001 pc 30d5 psl 3c00000
> May  8 21:33:53 acornrc vmunix: mser=0x2c1 page=11872
> 
> Bob Weissman

Bob - When one of the two cpu parity bits <6-5> is set (bit 6 is), the
memory cd bits <9-8> are loaded with a 2-bit code which indicates the
source of the parity error:
	00 - Q22 bus mem or device
	01 - KA630 on board memory
	10 - MEM expansion module #1
	11 - MEM expansion module #2

bit 9 of your mser is set (8 is not) therefore, I suspect memory expansion
module #1 is where your problem is.

Good luck!!

Mike Kitchen
South Central Bell