i386/72960: BTX halted with Promise Tx2000 Raid

[Holland Rhodes]

>Number:         72960
>Category:       i386
>Synopsis:       BTX halted with Promise Tx2000 Raid
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Oct 21 12:30:19 GMT 2004
>Closed-Date:
>Last-Modified:
>Originator:     Holland Rhodes
>Release:        5.3
>Organization:
>Environment:
can't boot
>Description:
5.2.1 - 5.3-RC1 fail to boot when the onboard Promise Tx2000 is in RAID mode. The motherboard is a Gigabyte 7vaxp rev 1.1 with bios F14, onboard promise controller is bios ver 2.00.0.33. 

on 5.2.1 output is:

int=0000000d err=00000000 efl=00030056 eip=00009066
eax=040000b8 ebx=00002820 ecx=00000000 edx=000008ee
esi=00009701 edi=00001f98 ebp=00000154 esp=00001800
cs=0000 ds=0000 es=0000 fs=0000 gs=0000 ss=0000
cs:eip=0f 01 1e d6 96 0f 01 16-d0 96 0f 20 c0 66 83 c8
       01 0f 22 c0 ea 7f 90 08-00 31 c9 b1 10 8e d1 b1
ss:esp=0a 69 6e 74 3d 30 30 30-30 30 30 30 64 20 20 65
       72 72 3d 30 30 30 30 30-30 30 30 20 20 65 66 6c
BTX halted

On 5.3-RC1 output is a bunch of continuously scrolling hex data. This problem does not exist in 4.x nor 5.0 and 5.1. I don't have a 5.2 CD to test with.
>How-To-Repeat:
boot from freebsd cd.
>Fix:
      
>Release-Note:
>Audit-Trail:
>Unformatted: