Date: Tue, 3 Mar 1998 08:39:32 -0600 (CST) From: The Good/John Scholvin <good@enteract.com> To: freebsd-hackers@FreeBSD.ORG Subject: Help: 2.2.5 crashing on boot after I add RAM Message-ID: <199803031439.IAA20074@enteract.com>
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Please accept my apologies if thie list is inappropriate for this question!
I tried comp.unix.bsd.freebsd.misc and didn't see anything.
I've got an old Compaq Contura 4/25 laptop which I'm trying to install 2.2.5
on, and I've got a problem I can't figure out. The machine boots the GENERIC
kernel fine when it has 8MB RAM installed. I've got an expansion RAM card
which, when installed, ups the total to 20MB. The GENERIC kernel no longer
boots; it never even gets to the probe stage. I figure, no problem, build a
new kernel with option "MAXMEM=(20*1024)" after the example I found in
LINT.
With this new kernel, I now get a message before the probing starts which
says
BIOS basemem (639K) != RTC basemem (640K), setting to BIOS value
BIOS extmem (15232K) != RTC extmem (15360K)
Then the probing occurs, apparently successfully, and after the npx0 probe,
I get this (typed in by hand, but I think I copied it correctly):
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x2c
fault code = supervisor read, page not present
instruction pointer = 0x8:0xf01a48b3
stack pointer = 0x10:0xefbffef8
frame pointer = 0x10:0xefbfff04
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 0 (swapper)
interrupt mask =
panic: page fault
syncing disks... done
Any ideas? Obviously, it's idea of how much extended memory I have is
confused. Is 20MB a valid option? Does that number need to be an even power
of 2, or is there something else going on here?
Also, I have another question since I originally posted. The laptop that's
crashing is bare bones; I build the kernel on my desktop and ftp it over. If
I config the crashing kernel -g and I want to analyze the crash dump from it
on the other machine, can I do this? Which files do I need to transfer back
to the desktop?
Thanks in advance!
John
--
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