Shuttle SB75G2

  I'm trying to load FreeBSD on this (new) system -- 4.9 and 5.2 (release,
not current).  As something of a test case, I also loaded XP pro on it.
It obviously isn't working yet and I'm starting the process of figuring out
why.

  The system works well enough to load, boot and install 4.9 and 5.2.  I
can't get it to stay up long enough to recompile the OS (dies during
buildworld).  When the system dies, it tends to freeze or reboot.  Once, it
looked like it may have double-faulted (haven't chased that one down yet).

  I tried a few things.  I tested with APIC and HT disabled.  Under 5.2, I
booted up with various options (safe, default, and APIC disabled).  The
safe mode was where I saw what looked like the double-fault.

  Given the double-fault, I figured that I might have some bad memory.  I
tried changing the timings a bit and then ultimately ran the Memtest86 ISO
and let it run for a few hours and it didn't find any problems with the
default settings.

  XP hasn't had any problems, but it really hasn't had any kind of workout
comparable to the buildworld.

  IRQs are a little shared, but I don't know where the pitfalls are there.

  [sorted, stripped a bit]
		ioapic0 <Version 2.0> irqs 0-23 on motherboard
	1	atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
	1	atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
	3	sio1 port 0x2f8-0x2ff irq 3 on acpi0
	4	sio0 port 0x3f8-0x3ff irq 4 on acpi0
	6	fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> irq 6 drq 2 on acpi0
	7	ppc0 port 0x378-0x37f irq 7 on acpi0
	12	psm0: <PS/2 Mouse> irq 12 on atkbdc0
	14	ata0: at 0x1f0 irq 14 on atapci0
	15	ata1: at 0x170 irq 15 on atapci0
	16	pcib1: slot 0 INTA is routed to irq 16
	16	uhci0: <Intel 82801EB (ICH5) USB controller USB-A> irq 16 at device 29.0 on pci0
	16	uhci3: <Intel 82801EB (ICH5) USB controller USB-D> irq 16 at device 29.3 on pci0
	18	fwohci0: <VIA VT6306> irq 18 at device 6.0 on pci2
	18	uhci2: <Intel 82801EB (ICH5) USB controller USB-C> irq 18 at device 29.2 on pci0
	19	bge0: <Broadcom BCM5788 Gigabit Ethernet, ASIC rev. 0x3003> irq 19 at device 7.0 on pci2
	19	uhci1: <Intel 82801EB (ICH5) USB controller USB-B> irq 19 at device 29.1 on pci0

  Anybody had previous experience with this hardware or care to steer me at
anything?  Left to my own devices, I'm going to try and get it to lock up
(rather than reboot) and see if it'll tell me where.  All but one of the
lockups seemed pretty hard (no response from keyboard, not even buffering).