New kernel built from sources -current as of this morning's (18 July)
update...

Kernel compiles and links just fine, but upon booting, it gets as far as
reporting the root device, and then panics:

	vm_fault(0xf0961900, 0, 1, 0) -> 1
	kernel: page fault trap, code=0
	Stopped at     0:    invalid address

This is 100% repeatable.

My kernel config is a bit different from GENERIC.  In particular, I've
got it nailed down to support only my Pentium-II processor, and I've got
the entire hardware config nailed (no wildcards).  Here's the entire
config file:

#	$NetBSD: GENERIC,v 1.162 1998/07/12 19:51:56 augustss Exp $
#
#	GENERIC -- everything that's currently supported
#

include "arch/i386/conf/std.i386"

maxusers	32		# estimated number of users

# CPU support.  At least one is REQUIRED.
#options 	I386_CPU
#options 	I486_CPU
#options 	I586_CPU
options 	I686_CPU

# CPU-related options.
options 	MATH_EMULATE	# floating point emulation
#options 	VM86		# virtual 8086 emulation
options 	USER_LDT	# user-settable LDT; used by WINE
# eliminate delay no-ops in I/O; recommended on all but very old machines
#options 	DUMMY_NOPS

# Misc. i386-specific options
options 	XSERVER		# X server support in console drivers

# This option allows you to force a serial console at the specified
# I/O address.   see console(4) for details.
#options 	"CONSDEVNAME=\"com\""

# The following options override the memory sizes passed in from the boot
# block.  Use them *only* if the boot block is unable to determine the correct
# values.  Note that the BIOS may *correctly* report less than 640k of base
# memory if the extended BIOS data area is located at the top of base memory
# (as is the case on most recent systems).
#options 	REALBASEMEM=...	# size of base memory
#options 	REALEXTMEM=...	# size of extended memory

# Standard system options

options 	UCONSOLE	# users can use TIOCCONS (for xconsole)
options 	INSECURE	# disable kernel security levels

options 	RTC_OFFSET=480	# hardware clock is this many mins. west of GMT
options 	NTP		# NTP phase/frequency locked loop

options 	KTRACE		# system call tracing via ktrace(1)

#options 	UVM		# Use UVM instead of Mach VM.
#options 	PMAP_NEW	# new pmap interface; requires UVM

options 	SYSVMSG		# System V-like message queues
options 	SYSVSEM		# System V-like semaphores
options 	SYSVSHM		# System V-like memory sharing
#options 	SHMMAXPGS=1024	# 1024 pages is the default

options 	LKM		# loadable kernel modules

# Diagnostic/debugging support options
options 	DIAGNOSTIC	# cheap kernel consistency checks
#options 	DEBUG		# expensive debugging checks/support
#options 	KMEMSTATS	# kernel memory statistics (vmstat -m)
options 	DDB		# in-kernel debugger
#options 	DDB_HISTORY_SIZE=100	# enable history editing in DDB
#options 	KGDB		# remote debugger
#options 	"KGDB_DEVNAME=\"com\"",KGDBADDR=0x3f8,KGDBRATE=9600
#makeoptions	DEBUG="-g"	# compile full symbol table

# Compatibility options
#options 	COMPAT_NOMID	# compatibility with 386BSD, BSDI, NetBSD 0.8,
#options 	COMPAT_09	# NetBSD 0.9,
#options 	COMPAT_10	# NetBSD 1.0,
#options 	COMPAT_11	# NetBSD 1.1,
options 	COMPAT_12	# NetBSD 1.2,
options 	COMPAT_13	# NetBSD 1.3,
options 	COMPAT_43	# and 4.3BSD
options 	COMPAT_386BSD_MBRPART # recognize old partition ID

options 	COMPAT_SVR4	# binary compatibility with SVR4
options 	COMPAT_IBCS2	# binary compatibility with SCO and ISC
options 	COMPAT_LINUX	# binary compatibility with Linux
options 	COMPAT_FREEBSD	# binary compatibility with FreeBSD

# Executable format options
options 	EXEC_ELF32	# 32-bit ELF executables (SVR4, Linux)

# File systems
file-system 	FFS		# UFS
#file-system 	EXT2FS		# second extended file system (linux)
#file-system 	LFS		# log-structured file system
file-system 	MFS		# memory file system
file-system 	NFS		# Network File System client
file-system 	CD9660		# ISO 9660 + Rock Ridge file system
file-system 	MSDOSFS		# MS-DOS file system
file-system 	FDESC		# /dev/fd
file-system 	KERNFS		# /kern
file-system 	NULLFS		# loopback file system
#file-system 	PORTAL		# portal filesystem (still experimental)
file-system 	PROCFS		# /proc
#file-system 	UMAPFS		# NULLFS + uid and gid remapping
file-system 	UNION		# union file system

# File system options
options 	QUOTA		# UFS quotas
#options 	FFS_EI		# FFS Endian Independant support
options 	NFSSERVER	# Network File System server
#options 	EXT2FS_SYSTEM_FLAGS # makes ext2fs file flags (append and
				# immutable) behave as system flags.

# Networking options
options 	GATEWAY		# packet forwarding
options 	INET		# IP + ICMP + TCP + UDP
#options 	MROUTING	# IP multicast routing
#options 	NS		# XNS
#options 	NSIP		# XNS tunneling over IP
#options 	ISO,TPIP	# OSI
#options 	EON		# OSI tunneling over IP
#options 	CCITT,LLC,HDLC	# X.25
#options 	NETATALK	# AppleTalk networking protocols
options 	PPP_BSDCOMP	# BSD-Compress compression support for PPP
options 	PPP_DEFLATE	# Deflate compression support for PPP
options 	PPP_FILTER	# Active filter support for PPP (requires bpf)
options 	PFIL_HOOKS	# pfil(9) packet filter hooks
options 	IPFILTER_LOG	# ipmon(8) log support

# Compatibility with 4.2BSD implementation of TCP/IP.  Not recommended.
#options 	TCP_COMPAT_42

# These options enable verbose messages for several subsystems.
# Warning, these may compile large string tables into the kernel!
options 	EISAVERBOSE	# verbose EISA device autoconfig messages
options 	PCIVERBOSE	# verbose PCI device autoconfig messages
#options 	PCMCIAVERBOSE	# verbose PCMCIA configuration messages
options 	SCSIVERBOSE	# human readable SCSI error messages
options 	USBVERBOSE	# verbose USB device autoconfig messages

options 	NFS_BOOT_BOOTP,NFS_BOOT_BOOTPARAM

# Kernel root file system and dump configuration.
config		netbsd	root on ? type ffs
#config		netbsd	root on sd0a type ffs
#config		netbsd	root on ? type nfs

#
# Device configuration
#

mainbus0 at root

#apm0	at mainbus0			# Advanced power management


# Basic Bus Support

# PCI bus support
pci0	at mainbus0 bus 0
#pci*	at pchb? bus ?
pci1	at ppb0 bus 1
# XXX 'puc's aren't really bridges, but there's no better place for them here
puc*	at pci? dev ? function ?	# PCI "universal" comm. cards

# PCI bridges
pchb0	at pci0 dev 0 function 0	# PCI-Host bridges
#pceb*	at pci? dev ? function ?	# PCI-EISA bridges
pcib0	at pci0 dev 7 function 1	# PCI-ISA bridges
ppb0	at pci0 dev 1 function 0	# PCI-PCI bridges

# EISA bus support
#eisa*	at mainbus?
#eisa*	at pceb?

# ISA bus support
#isa*	at mainbus?
#isa*	at pceb?
isa0	at pcib0

# PCMCIA bus support
#pcmcia*	at pcic? controller ? socket ?

# ISA PCMCIA controllers
#pcic0	at isa? port 0x3e0 iomem 0xd0000 iosiz 0x4000
#pcic1	at isa? port 0x3e2 iomem 0xd4000 iosiz 0x4000

# ISA Plug-and-Play bus support
isapnp0	at isa0

# ISA Plug-and-Play PCMCIA controllers
#pcic*	at isapnp?

# Coprocessor Support

# Math Coprocessor support
npx0	at isa0 port 0xf0 irq 13	# x86 math coprocessor


# Console Devices

# ISA console.  You can only configure one of these!
pc0	at isa0 port 0x60 irq 1		# pccons generic PC console driver
#vt0	at isa? port 0x60 irq 1		# PCVT console driver

pcppi0	at isa0
sysbeep0	at pcppi0

# Serial Devices

# PCI serial interfaces
#com*	at puc? port ?			# 16x450s on "universal" comm boards
#cy*	at pci? dev ? function ?	# Cyclades Cyclom-Y serial boards

# ISA Plug-and-Play serial interfaces
com1	at isapnp0			# Modems and serial boards

# PCMCIA serial interfaces
#com*	at pcmcia? function ?		# Modems and serial cards

# ISA serial interfaces
#options 	COM_HAYESP		# adds Hayes ESP serial board support
com0	at isa0 port 0x3f8 irq 4	# Standard PC serial ports
#com1	at isa? port 0x2f8 irq 3
#com2	at isa? port 0x3e8 irq 5
#com3	at isa? port 0x2e8 irq 9
#ast0	at isa? port 0x1a0 irq 5	# AST 4-port serial cards
#com*	at ast? slave ?
#boca0	at isa? port 0x100 irq 5	# BOCA 8-port serial cards
#com*	at boca? slave ?
#rtfps0	at isa? port 0x1230 irq 10	# RT 4-port serial cards
#com*	at rtfps? slave ?
#cy0	at isa? iomem 0xd4000 irq 12	# Cyclades serial cards


# Parallel Printer Interfaces

# PCI parallel printer interfaces
#lpt*	at puc? port ?			# || ports on "universal" comm boards

# ISA parallel printer interfaces
lpt0	at isa? port 0x378 irq 7	# standard PC parallel ports
#lpt1	at isa? port 0x278
#lpt2	at isa? port 0x3bc


# SCSI Controllers and Devices

# PCI SCSI controllers
ahc0	at pci0 dev 15 function 0	# Adaptec [23]94x, aic78x0 SCSI
#bha*	at pci? dev ? function ?	# BusLogic 9xx SCSI
#isp*	at pci? dev ? function ?	# Qlogic ISP [12]0x0 SCSI/FibreChannel
#ncr*	at pci? dev ? function ?	# NCR 53c8xx SCSI

# EISA SCSI controllers
#ahb*	at eisa? slot ?			# Adaptec 174[02] SCSI
#ahc*	at eisa? slot ?			# Adaptec 274x, aic7770 SCSI
#bha*	at eisa? slot ?			# BusLogic 7xx SCSI
#uha*	at eisa? slot ?			# UltraStor 24f SCSI

# PCMCIA SCSI controllers
#aic*	at pcmcia? function ?		# Adaptec APA-1460 SCSI

# ISA Plug-and-Play SCSI controllers
#aic*	at isapnp?			# Adaptec AHA-1520B

# ISA SCSI controllers
#aha0	at isa? port 0x330 irq ? drq ?	# Adaptec 154[02] SCSI
#aha1	at isa? port 0x334 irq ? drq ?
#ahc0	at isa? port ? irq ?		# Adaptec 284x SCSI
#aic0	at isa? port 0x340 irq 11	# Adaptec 152[02] SCSI
#bha0	at isa? port 0x330 irq ? drq ?	# BusLogic [457]4X SCSI
#bha1	at isa? port 0x334 irq ? drq ?
#sea0	at isa? iomem 0xc8000 irq 5	# Seagate/Future Domain SCSI
#uha0	at isa? port 0x330 irq ? drq ?	# UltraStor [13]4f SCSI
#uha1	at isa? port 0x340 irq ? drq ?
#wds0	at isa? port 0x350 irq 15 drq 6	# WD7000 and TMC-7000 controllers
#wds1	at isa? port 0x358 irq 11 drq 5

# SCSI bus support
#scsibus* at aha?
#scsibus* at ahb?
scsibus0 at ahc0
#scsibus* at aic?
#scsibus* at bha?
#scsibus* at isp?
#scsibus* at ncr?
#scsibus* at sea?
#scsibus* at uha?
#scsibus* at wds?

# SCSI devices
sd0	at scsibus0 target 0 lun 0	# SCSI disk drives
sd1	at scsibus0 target 1 lun 0
st0	at scsibus0 target 6 lun 0	# SCSI tape drives
cd0	at scsibus0 target 5 lun 0	# SCSI CD-ROM drives
#ch*	at scsibus? target ? lun ?	# SCSI autochangers
#ss*	at scsibus? target ? lun ?	# SCSI scanners
#uk*	at scsibus? target ? lun ?	# SCSI unknown


# IDE and Related Devices

# ISA Plug-and-Play IDE controllers
#wdc*	at isapnp?

# PCMCIA IDE controllers
#wdc*	at pcmcia? function ?

# ISA IDE controllers
#wdc0	at isa? port 0x1f0 irq 14	# ST506, ESDI, and IDE controllers
#wdc1	at isa? port 0x170 irq 15

# IDE drives
#wd*	at wdc? drive ?			# the drives themselves

# ATAPI bus support
#atapibus* at wdc?

# ATAPI devices
#cd*	at atapibus? drive ?		# ATAPI CD-ROM drives
#sd*	at atapibus? drive ?		# ATAPI disk drives


# Miscellaneous mass storage devices

# ISA floppy
fdc0	at isa0 port 0x3f0 irq 6 drq 2	# standard PC floppy controllers
#fdc1	at isa? port 0x370 irq ? drq ?
fd0	at fdc0 drive 0			# the drives themselves
# some machines need you to do this instead of fd*
#fd0	at fdc0 drive 0

# ISA CD-ROM devices
#mcd0	at isa? port 0x300 irq 10	# Mitsumi CD-ROM drives

# ISA tape devices
# note: the wt driver conflicts unpleasantly with SMC boards at the
# same I/O address. The probe reprograms their EEPROMs. Don't
# uncomment it unless you are actually using it.
#wt0	at isa? port 0x308 irq 5 drq 1	# Archive and Wangtek QIC tape drives


# Network Interfaces

# PCI network interfaces
#de*	at pci? dev ? function ?	# DEC 21x4x-based Ethernet
#en*	at pci? dev ? function ?	# ENI/Adaptec ATM
ep0	at pci0 dev 13 function 0	# 3Com 3c59x/3c90x Ethernet
#epic*	at pci? dev ? function ?	# SMC EPIC/100 Ethernet
#esh*	at pci? dev ? function ?	# Essential HIPPI card
#fpa*	at pci? dev ? function ?	# DEC DEFPA FDDI
#fxp*	at pci? dev ? function ?	# Intel EtherExpress PRO 10+/100B
#le*	at pci? dev ? function ?	# PCnet-PCI Ethernet
#ne*	at pci? dev ? function ?	# NE2000-compatible Ethernet
#tl*	at pci? dev ? function ?	# ThunderLAN-based Ethernet

# EISA network interfaces
#ep*	at eisa? slot ?			# 3Com 3c579 Ethernet
#fea*	at eisa? slot ?			# DEC DEFEA FDDI

# ISA Plug-and-Play network interfaces
#ep*	at isapnp?			# 3Com 3c509 Ethernet
#ne*	at isapnp?			# NE2000-compatible Ethernet

# PCMCIA network interfaces
#ep*	at pcmcia? function ?		# 3Com 3c589 and 3c562 Ethernet
#mbe*	at pcmcia? function ?		# MB8696x based Ethernet
#ne*	at pcmcia? function ?		# NE2000-compatible Ethernet
#sm*	at pcmcia? function ?		# Megahertz Ethernet

# ISA network interfaces
#ate0	at isa? port 0x2a0 irq ?		# AT1700
#ec0	at isa? port 0x250 iomem 0xd8000 irq 9	# 3Com 3c503 Ethernet
#eg0	at isa? port 0x280 irq 9		# 3C505 ethernet cards
#el0	at isa? port 0x300 irq 9		# 3C501 ethernet cards
#ep0	at isa? port ? irq ?			# 3C509 ethernet cards
#ef0	at isa? port 0x360 iomem 0xd0000 irq 7	# 3C507
#ai0	at isa? port 0x360 iomem 0xd0000 irq 7	# StarLAN
#fmv0	at isa? port 0x2a0 irq ?		# FMV-180 series
#ix0	at isa? port 0x300 irq 10		# EtherExpress/16
#iy0	at isa? port 0x360 irq ?		# EtherExpress PRO 10 ISA
#lc0	at isa? port 0x320 iomem ? irq ?	# DEC EtherWORKS III (LEMAC)
#depca0	at isa? port 0x300 iomem 0xc8000 iosiz 0x8000 irq 5	# DEPCA
#le*	at depca?
#nele0	at isa? port 0x320 irq 9 drq 7		# NE2100
#le*	at nele?
#bicc0	at isa? port 0x320 irq 10 drq 7		# BICC IsoLan
#le*	at bicc?
#ne0	at isa? port 0x280 irq 9		# NE[12]000 ethernet cards
#ne1	at isa? port 0x300 irq 10
#sm0	at isa? port 0x300 irq 10		# SMC91C9x Ethernet
#we0	at isa? port 0x280 iomem 0xd0000 irq 9	# WD/SMC Ethernet
#we1	at isa? port 0x300 iomem 0xcc000 irq 10

# MII bus support
#mii*	at tl?

# MII PHY network interfaces
#tlphy*	at mii? dev ?			# ThunderLAN PHYs
#nsphy*	at mii? dev ?			# NS and compatible PHYs


# USB Controller and Devices

# PCI USB controllers
#uhci*	at pci?				# Universal Host Controller (Intel)
#ohci*	at pci?				# Open Host Controller

# USB bus support
#usb*	at uhci?
#usb*	at ohci?

# USB Hubs
#uhub*	at usb?
#uhub*	at uhub? port ?

# USB Mice
#ums*	at uhub? port ?

# USB Keyboards
#ukbd*	at uhub? port ?

# USB Generic HID devices
#uhid*	at uhub? port ?

# USB Printer
#ulpt*	at uhub? port ?

# USB Generic driver
#ugen*	at uhub? port ?


# Audio Devices

# PCI audio devices
#eap*	at pci? dev ? function ?	# Ensoniq AudioPCI

# ISA Plug-and-Play audio devices
#guspnp*	at isapnp?			# Gravis Ultra Sound PnP audio
#sb*	at isapnp?			# SoundBlaster-compatible audio
#ym*	at isapnp?			# Yamaha OPL3-SA3 audio

# ISA audio devices
#aria0	at isa? port 0x290 irq 10 		# Aria
#gus0	at isa? port 0x220 irq 7 drq 1 drq2 6	# Gravis Ultra Sound
#pas0	at isa? port 0x220 irq 7 drq 1		# ProAudio Spectrum
#pss0	at isa? port 0x220 irq 7 drq 6  	# Personal Sound System
#sp0	at pss0 port 0x530 irq 10 drq 0		# 	sound port driver
#sb0	at isa? port 0x220 irq 7 drq 1 drq2 5	# SoundBlaster
wss0	at isa0 port 0x530 irq 10 drq 0	drq2 1	# Windows Sound System

# Audio support
#audio*	at aria?
#audio*	at eap?
#audio*	at gus?
#audio*	at guspnp?
#audio*	at pas?
#audio*	at sb?
#audio*	at sp?
audio0	at wss0
#audio*	at ym?

# The spkr driver provides a simple tone interface to the built in speaker.
#spkr0	at pcppi?		# PC speaker


# Mice

# ISA busmice
#lms0	at isa? port 0x23c irq 5	# Logitech bus mouse
#lms1	at isa? port 0x238 irq 5
#mms0	at isa? port 0x23c irq 5	# Microsoft InPort mouse
#mms1	at isa? port 0x238 irq 5
pms0	at pc? irq 12		# PS/2 auxiliary port mouse
#pms0	at vt? irq 12		# PS/2 auxiliary port mouse


# Joysticks

# ISA Plug-and-Play joysticks
#joy*	at isapnp?			# Game ports (usually on audio cards)

# ISA joysticks. Probe is a little strange; add only if you have one.
#joy0	at isa? port 0x201


# Miscellaneous Devices

# Planetconnect Satellite receiver driver.
#satlink0 at isa? port 0x300 drq 1


# Pull in optional local configuration
include	"arch/i386/conf/GENERIC.local"


# Pseudo-Devices

# disk/mass storage pseudo-devices
pseudo-device	ccd		4	# concatenated/striped disk devices
pseudo-device	md		1	# memory disk device (ramdisk)
pseudo-device	vnd		4	# disk-like interface to files

# network pseudo-devices
pseudo-device	bpfilter	12	# Berkeley packet filter
pseudo-device	ipfilter		# IP filter (firewall) and NAT
pseudo-device	loop			# network loopback
pseudo-device	ppp		2	# Point-to-Point Protocol
pseudo-device	sl		2	# Serial Line IP
#pseudo-device	strip		2	# Starmode Radio IP (Metricom)
#pseudo-device	tun		2	# network tunneling over tty

# miscellaneous pseudo-devices
pseudo-device	pty		64	# pseudo-terminals
#pseudo-device	tb		1	# tablet line discipline

# rnd is EXPERIMENTAL at this point.
#pseudo-device	rnd			# /dev/random and in-kernel generator
#options 	RND_COM			# use "com" randomness as well (BROKEN)


-----------------------------------------------------------------------------
| Paul Goyette      | Public Key fingerprint:    | E-mail addresses:        |
| Network Engineer  |   0E 40 D2 FC 2A 13 74 A0  |  paul@whooppee.com       |
| and kernel hacker |   E4 69 D5 BE 65 E4 56 C6  |  paul.goyette@ascend.com |
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