fail to boot 6.0 BETA2

[rxg%lavabit.com@localhost]

Hi all,
Just to boot cdrom iso on the industrial mainboard with RS690 chipset
but get panic. (It also happens on 5.1.2 iso.)
The message as below:

>> NetBSD/x86 BIOS Boot, Revision 5.9 (from NetBSD 6.0_BETA2)
>> Memory: 624/3095104 k
Press return to boot now, any other key for boot menu
booting cd0a:netbsd - starting in 0 seconds.
12166816+633576+650328 [835728+552566]=0xf28098
Loading /stand/amd64/6.0/modules/cd9660/cd9660.kmod
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
    2006, 2007, 2008, 2009, 2010, 2011, 2012
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

NetBSD 6.0_BETA2 (GENERIC)
total memory = 3791 MB
avail memory = 3665 MB
mainbus0 (root)
cpu0 at mainbus0 apid 0: AMD Turion(tm) 64 X2 Mobile Technology TL-66, id
0x60f81
cpu1 at mainbus0 apid 1: AMD Turion(tm) 64 X2 Mobile Technology TL-66, id
0x60f81
ioapic0 at mainbus0 apid 2
acpi0 at mainbus0: Intel ACPICA 20110623
hpet0 at acpi0: high precision event timer (mem 0xfed00000-0xfed00400)
acpibut0 at acpi0 (PWRB, PNP0C0C): ACPI Power Button
PMIO (PNP0C02) at acpi0 not configured
attimer1 at acpi0 (TMR, PNP0100): io 0x40-0x43
pcppi1 at acpi0 (SPKR, PNP0800): io 0x61
midi0 at pcppi1: PC speaker
sysbeep0 at pcppi1
SYSR (PNP0C02) at acpi0 not configured
UAR1 (PNP0501) at acpi0 not configured
UAR2 (PNP0501) at acpi0 not configured
UAR3 (PNP0501) at acpi0 not configured
UAR4 (PNP0501) at acpi0 not configured
MEM (PNP0C01) at acpi0 not configured
acpitz0 at acpi0 (THRM)
attimer1: attached to pcppi1
pci0 at mainbus0 bus 0: configuration mode 1
pchb0 at pci0 dev 0 function 0: vendor 0x1002 product 0x7910 (rev. 0x00)
ppb0 at pci0 dev 1 function 0: vendor 0x1002 product 0x7912 (rev. 0x00)
pci1 at ppb0 bus 1
vga0 at pci1 dev 5 function 0: vendor 0x1002 product 0x791f (rev. 0x00)
wsdisplay0 at vga0 kbdmux 1
radeondrm0 at vga0: ATI Radeon RS690 X1270 IGP
radeondrm0: Initialized radeon 1.29.0 20080613
ppb1 at pci0 dev 4 function 0: vendor 0x1002 product 0x7914 (rev. 0x00)
ppb1: PCI Express 1.0 <Root Port of PCI-E Root Complex>
pci2 at ppb1 bus 2
re0 at pci2 dev 0 function 0: RealTek 8168/8111 PCIe Gigabit Ethernet
(rev. 0x02)
re0: interrupting at ioapic0 pin 16
re0: Ethernet address 00:19:0f:01:a4:0c
rgephy0 at re0 phy 7: RTL8169S/8110S/8211 1000BASE-T media interface, rev. 2
rgephy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT,
1000baseT-FDX, auto
ppb2 at pci0 dev 5 function 0: vendor 0x1002 product 0x7915 (rev. 0x00)
ppb2: PCI Express 1.0 <Root Port of PCI-E Root Complex>
pci3 at ppb2 bus 3
re1 at pci3 dev 0 function 0: RealTek 8168/8111 PCIe Gigabit Ethernet
(rev. 0x02)
re1: interrupting at ioapic0 pin 17
re1: Ethernet address 00:19:0f:01:a4:0d
rgephy1 at re1 phy 7: RTL8169S/8110S/8211 1000BASE-T media interface, rev. 2
rgephy1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT,
1000baseT-FDX, auto
ixpide0 at pci0 dev 18 function 0: ATI Technologies IXP IDE Controller
(rev. 0x00)
ixpide0: using ioapic0 pin 22 for native-PCI interrupt
atabus0 at ixpide0 channel 0
atabus1 at ixpide0 channel 1
ohci0 at pci0 dev 19 function 0: vendor 0x1002 product 0x4387 (rev. 0x00)
ohci0: interrupting at ioapic0 pin 16
ohci0: OHCI version 1.0, legacy support
usb0 at ohci0: USB revision 1.0
ohci1 at pci0 dev 19 function 1: vendor 0x1002 product 0x4388 (rev. 0x00)
ohci1: interrupting at ioapic0 pin 17
ohci1: OHCI version 1.0, legacy support
usb1 at ohci1: USB revision 1.0
ohci2 at pci0 dev 19 function 2: vendor 0x1002 product 0x4389 (rev. 0x00)
ohci2: interrupting at ioapic0 pin 18
ohci2: OHCI version 1.0, legacy support
usb2 at ohci2: USB revision 1.0
ohci3 at pci0 dev 19 function 3: vendor 0x1002 product 0x438a (rev. 0x00)
ohci3: interrupting at ioapic0 pin 17
ohci3: OHCI version 1.0, legacy support
usb3 at ohci3: USB revision 1.0
ohci4 at pci0 dev 19 function 4: vendor 0x1002 product 0x438b (rev. 0x00)
ohci4: interrupting at ioapic0 pin 18
ohci4: OHCI version 1.0, legacy support
usb4 at ohci4: USB revision 1.0
ehci0 at pci0 dev 19 function 5: vendor 0x1002 product 0x4386 (rev. 0x00)
ehci0: applying AMD SB600/SB700 USB freeze workaround
ehci0: interrupting at ioapic0 pin 19
ehci0: dropped intr workaround enabled
ehci0: companion controllers, 2 ports each: ohci0 ohci1 ohci2 ohci3 ohci4
usb5 at ehci0: USB revision 2.0
piixpm0 at pci0 dev 20 function 0: vendor 0x1002 product 0x4385 (rev. 0x14)
piixpm0: interrupting at SMI, polling
iic0 at piixpm0: I2C bus
ixpide1 at pci0 dev 20 function 1: ATI Technologies IXP IDE Controller
(rev. 0x00)
ixpide1: primary channel interrupting at ioapic0 pin 14
atabus2 at ixpide1 channel 0
ixpide1: secondary channel interrupting at ioapic0 pin 15
atabus3 at ixpide1 channel 1
hdaudio0 at pci0 dev 20 function 2: HD Audio Controller
hdaudio0: interrupting at ioapic0 pin 16
hdafg0 at hdaudio0: Realtek ALC888
hdafg0: DAC00 4ch: Speaker [Jack]
hdafg0: DAC01 2ch: Speaker [Jack]
hdafg0: DIG02 2ch: SPDIF Out [Jack]
hdafg0: ADC03 2ch: Line In [Jack], Mic In [Jack]
hdafg0: ADC04 2ch: Mic In [Jack]
hdafg0: 4ch/2ch 44100Hz 48000Hz 96000Hz 192000Hz PCM16 PCM20 PCM24 AC3
audio0 at hdafg0: full duplex, playback, capture, independent
pcib0 at pci0 dev 20 function 3: vendor 0x1002 product 0x438d (rev. 0x00)
ppb3 at pci0 dev 20 function 4: vendor 0x1002 product 0x4384 (rev. 0x00)
pci4 at ppb3 bus 4
pchb1 at pci0 dev 24 function 0: vendor 0x1022 product 0x1100 (rev. 0x00)
pchb2 at pci0 dev 24 function 1: vendor 0x1022 product 0x1101 (rev. 0x00)
pchb3 at pci0 dev 24 function 2: vendor 0x1022 product 0x1102 (rev. 0x00)
pchb4 at pci0 dev 24 function 3: vendor 0x1022 product 0x1103 (rev. 0x00)
amdtemp0 at pchb4: AMD CPU Temperature Sensors (K8: core rev BH-G1, socket
S1)
isa0 at pcib0
tpm0 at isa0 iomem 0xfed40000-0xfed44fff irq 7: IFX SLB 9635 TT 1.2 rev 0x10
com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
com0: console
com1 at isa0 port 0x2f8-0x2ff irq 3: ns16550a, working fifo
pckbc0 at isa0 port 0x60-0x64
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0 mux 1
pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 mux 0
acpicpu0 at cpu0: ACPI CPU
acpicpu1 at cpu1: ACPI CPU
panic: kernel diagnostic assertion "offset != 0 && offset < softint_bytes"
failed: file "/usr/src/sys/kern/kern_softint.c", line 464
fatal breakpoint trap in supervisor mode
trap type 1 code 0 rip ffffffff802592a5 cs 8 rflags 246 cr2  0 cpl 6 rsp
ffffffff8103bc48
Stopped in pid 0.1 (system) at  netbsd:breakpoint+0x5:  leave
db{0}>

Any idea?

-rxg