Date: Wed, 20 Sep 2000 10:39:18 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.ORG> To: Koen Schreel <K.R.A.M.Schreel@tue.nl> Cc: Freebsd-stable@FreeBSD.ORG, rnordier@FreeBSD.ORG Subject: RE: BTX error on boot. Message-ID: <XFMail.000920103918.jhb@FreeBSD.org> In-Reply-To: <39C8B807.AC387639@tue.nl>
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On 20-Sep-00 Koen Schreel wrote:
> Hi,
>
> I have a new (dual cpu) system here on which I want to install FreeBSD
> 4.1 but when booting from CDROM or floppy I get the message:
>
> -
> int=0000000d err=00000013 efl=00010046 eip=000093f2
> eax=00000000 ebx=00000204 ecx=0000000b edx=00001b80
> esi=00000000 edi=00000005 ebp=000003fc esp=000017dc
> cs=0008 ds=0000 es=0000 fs=0000 gs=0000 ss=0010
> cs:eip=6a 08 eb 3c 6a 09 eb 38-6a 0a eb 34 6a 0b eb 30
> ss:esp=91 e8 00 00 00 f0 00 00-46 02 03 00 02 04 00 00
> BTX halted
>
> System configuration:
>
> MSI 694D Pro motherboard with 2 PIII-800, bios version 1.4
> 512 MB Memory PC-100 CAS 2
> Adaptec 29160 U160-SCSI controller with 5 disks
> Matrox G400-DH
Hmm, it is dying trying to handle a clock interrupt on IRQ0:
#
# Hardware interrupt jump table.
#
intx20: push $0x8 # Int 0x20: IRQ0
jmp int_hw # V86 int 0x8
push $0x9 # Int 0x21: IRQ1
jmp int_hw # V86 int 0x9
It appears to be dying on that push, which makes no sense. However
the err code is 0x13, which is not a valid selector in BTX (well,
selector 0x10 should be at a DPL of 0, not 3), so it _may_ be this
item in the list of GPF exceptions:
14.Interrupt or exception via trap or interrupt gate from V86 mode to
privilege level other than zero.
However, for that to be the case, BTX's IDT would have to be fubar'd.
Looking at the stack, it looks like it was at 0xf000:91e8 in the previous
frame, which would be in the BIOS and thus in VM86 mode. Robert, do you
have any ideas?
--
John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/
PGP Key: http://www.cslab.vt.edu/~jobaldwi/pgpkey.asc
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