Re: BTX halted

From: John Baldwin <jhb_at_FreeBSD.org>
Date: Thu, 13 May 2004 15:50:28 -0400
On Thursday 13 May 2004 02:36 pm, Android66 wrote:
> Hi!
>
> I have read about the "BTX halted" problems in the archives (found 3
> related threads) but I decided to report my problem also, even though I
> have yet to try out some of the mentioned solutions. This is more or
> less a repost of my mail to the freebsd-questions mailing list as I feel
> I should report it here also.
>
> I'm trying to install FreeBSD 5.2.1 onto one of my computers. I'm
> relatively fresh to FreeBSD so I don't have much experience with errors
> suh as this one, which appears right after booting from the CD (burned
> from the disc-1 ISO file, works OK on two other computers. I finalized
> the CD after burning so this shouldn't be a problem)
>
> Here's the error:
>
> BTX loader 1.00 BTX version 1.01
> Console: internal video/keyboard
> BIOS CD is cd0
> BIOS drive A: is disk0
> BIOS drive C: is disk1
> BIOS drive D: is disk2
>
> BIOS 639kB/523264kB available memory
>
> FreeBSD/i386 bootstrap loader, Revision 1.1
> (root_at_wvu1.btc.adaptec.com, Mon Feb 23 18:35:51 GMT 2004)
>
> int=0000000d err=00000000 efl=00030246 eip=00003034
> eax=0000205d ebx=00000004 ecx=00002000 edx=0000288c
> esi=00000904 edi=0006290c epb=00001538 esp=00001502
> cs=f000 ds=ee00 es=ee00     fs=0000 gs=0000 ss=ee00
> cs:eip=0f 20 dd 81 e5 00 f0 0f-20 c2 0f 01 e0 a8 01 75
>         08 80 e2 fe e8 53 ff eb-21 0f 20 e0 a9 30 00 75
> ss:esp=0c 29 06 00 04 09 00 00-38 15 00 00 22 15 00 00
>         04 00 00 00 8c 28 00 00-04 00 00 00 5d 28 00 00
> BTX halted

00000000  0F20DD            mov ebp,cr3
00000003  81E500F0          and bp,0xf000
00000007  0F20C2            mov edx,cr0
0000000A  0F01E0            smsw ax
0000000D  A801              test al,0x1

Your BIOS is doing bad things.  Actually, there is a known workaround for this 
specific problem for Compaq BIOS's: try changing the ATA devices to use 
simple DMA or PIO rather than Ultra DMA.  I have patches to fix this but they 
make the bootstrap to big. :(

-- 
John Baldwin <jhb_at_FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org
Received on Thu May 13 2004 - 10:50:13 UTC

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