Well, okay, this _is_ the latest :-)
It gets much further than the previous kernel, but it still panics
at another point.

Here goes the boot log:

NetBSD/mac68k console
[ preserving 299496 bytes of netbsd symbol table ]
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

NetBSD 1.2D (LC040) #1: Tue Apr 22 16:26:46 JST 1997
    kenn@gon:/usr/src/sys/arch/mac68k/compile/LC040
Apple Macintosh Quadra 630  (68040)
real mem = 12582912
avail mem = 9043968
using 179 buffers containing 733184 bytes of memory
mrg: kernel has no ROM vectors for this machine!
adb: using serial console
mainbus0 (root)
obio0 at mainbus0
adb0 at obio0 (ADB event device)
asc0 at obio0: Apple Sound Chip
sn0 at obio0: unsupported machine type
esp0 at obio0: address 0x8ff000: NCR53C96, 16MHz, SCSI ID 7
scsibus0 at esp0: 8 targets
sd0 at scsibus0 targ 0 lun 0: <QUANTUM, TRB850S, 0405> SCSI2 0/direct fixed
sd0: 810MB, 3653 cyl, 4 head, 113 sec, 512 bytes/sec
cd0 at scsibus0 targ 3 lun 0: <MATSHITA, CD-ROM CR-8004A, 2.0a> SCSI2 5/cdrom removable
zsc0 at obio0 chip type 0 
zstty0 at zsc0 channel 0 (console)
zstty1 at zsc0 channel 1
nubus0 at mainbus0
ae0 at nubus0: address 00:20:78:0e:0c:c0, type Ethernet E420 Rev.A, 16KB memory
fpu0 at mainbus0 (emulator)
vm_fault(158000, 31a3f000, 3, 0) -> 1
  type 8, code [mmu,,ssw]: 485
trap type 8, code = 485, v= 31a3ff3c
kernel: MMU fault trap
pid = 0, pc = 0003A206, ps = 2000, sfc = 0001, dfc = 0001
Registers:
             0        1        2        3        4        5        6        7
dreg: 4AB9000F 00000000 00898000 FFFFD000 0014F2F0 F9001000 00000000 00000002
areg: 00002E2C 00000010 06BFFF00 00000858 0014F1C4 00B06AC8 00151F58 FFFFCFFC

Kernel stack (00151E84):
151E84: 000D4444 00151ED0 00000080 00898000 FFFFD000 0014F2F0 F9001000 00000000
151EA4: 00000002 06BFFF00 00000858 0014F1C4 00B06AC8 00000003 00151F58 00002FAE
151EC4: 00000008 00000485 31A3FF3C 4AB9000F 00000000 00898000 FFFFD000 0014F2F0
151EE4: F9001000 00000000 00000002 00002E2C 00000010 06BFFF00 00000858 0014F1C4
151F04: 00B06AC8 00151F58 FFFFCFFC 00000000 20000003 A2067008 00151F14 04850005
151F24: 00850005 31A3FF3C 31A3FF3C 00002EC0 31A3FF3C 00002EC0 06BFFF00 000000B0
151F44: 000000B0 00000019 00000000 000DFDB8 000F62BC 00151F68 0003A2EC 00000858
151F64: FFFFCFFC 00151F74 0003A36E FFFFCFFC 00151FAC 0001C102 00154147 0000C0A0
151F84: 8001078A F9001000 FFFFCFFC 00000068 02700340 00B06AC8 00000000 00000000
151FA4: 00000000 00000000 00B02040 00000000 00000000 00000000 00000000 00000000
151FC4: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
151FE4: 00000000 00154147 FFFFCFFC 00000000 00000000 00000000 00000000 
panic: MMU fault
Stopped at      _Debugger+0x6:  unlk    a6
db> t
_Debugger(8,151ebc,d4462,d40ff,898000) + 6
_panic(d40ff,898000,ffffd000,14f2f0,f9001000) + 40
_trap(8,485,31a3ff3c) + 1e6
_addrerr(?)
_vfs_opv_init_explicit(858) + e8
_vfs_opv_init(ffffcffc,151fac,1c102,154147,c0a0) + 14
_vfsinit(154147,c0a0,8001078a,f9001000,ffffcffc) + 14
_main() + 2c4
_main() + 2c4
db> 


It didn't use to bomb here on 630...  BTW, the config file is
almost identical to GENERIC except a few points:

*** GENERIC	Tue Apr 22 16:51:58 1997
--- LC040	Tue Apr 22 16:52:00 1997
***************
*** 29,35 ****
  options 	COMPAT_10	# NetBSD 1.0 binary compatibility
  options 	COMPAT_11	# NetBSD 1.1 binary compatibility
  options 	COMPAT_12	# NetBSD 1.2 binary compatibility
! options 	COMPAT_SUNOS	# SunOS 4.x binary compatibility
  #options 	COMPAT_M68K4K	# compatibility with NetBSD/m68k4k binaries
  
  # Filesystem options
--- 29,35 ----
  options 	COMPAT_10	# NetBSD 1.0 binary compatibility
  options 	COMPAT_11	# NetBSD 1.1 binary compatibility
  options 	COMPAT_12	# NetBSD 1.2 binary compatibility
! #options 	COMPAT_SUNOS	# SunOS 4.x binary compatibility
  #options 	COMPAT_M68K4K	# compatibility with NetBSD/m68k4k binaries
  
  # Filesystem options
***************
*** 40,51 ****
  file-system 	MFS		# memory-based filesystem
  file-system 	FDESC		# user file descriptor filesystem
  file-system 	UMAPFS		# uid/gid remapping filesystem
! file-system 	LFS		# Log-based filesystem (still experimental)
! file-system 	PORTAL		# portal filesystem (still experimental)
  file-system 	PROCFS		# /proc
  file-system 	CD9660		# ISO 9660 + Rock Ridge file system
  file-system 	UNION		# union file system
! file-system 	MSDOSFS		# MS-DOS FAT filesystem(s).
  
  # Filesystem options
  options 	QUOTA		# FFS quotas
--- 40,51 ----
  file-system 	MFS		# memory-based filesystem
  file-system 	FDESC		# user file descriptor filesystem
  file-system 	UMAPFS		# uid/gid remapping filesystem
! #file-system 	LFS		# Log-based filesystem (still experimental)
! #file-system 	PORTAL		# portal filesystem (still experimental)
  file-system 	PROCFS		# /proc
  file-system 	CD9660		# ISO 9660 + Rock Ridge file system
  file-system 	UNION		# union file system
! #file-system 	MSDOSFS		# MS-DOS FAT filesystem(s).
  
  # Filesystem options
  options 	QUOTA		# FFS quotas


Hmm...

Ken