I have an old Pentium running 1.5.  I'm trying to update it, but for some
reason nothing after 1.5 will run on it.

The following log shows it failing to boot -current from yesterday
(/netbsd) then correctly booting 1.5 (/onetbsd).  Both are plain
GENERIC kernels.

Any ideas on what's wrong would be appreciated.

>> NetBSD/i386 BIOS Boot, Revision 2.10
>> (entropy@zippy.local, Thu Jul  5 05:13:48 EDT 2001)
>> Memory: 635/48128 k
Press return to boot now, any other key for boot menu
booting fd0a:netbsd - starting in 0
type "?" or "help" for help.
> boot hd0a:netbsd -s
booting hd0a:netbsd (howto 0x2)
4532951+83004+324460 [65+263168+216671]=0x52c6f0
WARNING: CAN'T ALLOCATE MEMORY SEGMENT (0x100000/0xf00000/0x1) FROM IOMEM EXTENT MAP!
WARNING: CAN'T ALLOCATE MEMORY SEGMENT (0x1000000/0x2000000/0x1) FROM IOMEM EXTENT MAP!
(At this point the system resets immediately).

>> NetBSD/i386 BIOS Boot, Revision 2.10
>> (entropy@zippy.local, Thu Jul  5 05:13:48 EDT 2001)
>> Memory: 635/48128 k
Press return to boot now, any other key for boot menu
booting fd0a:netbsd - starting in 0
type "?" or "help" for help.
> boot hd0a:onetbsd -s
booting hd0a:onetbsd (howto 0x2)
3912155+378908+316656 [65+240192+195605]=0x4d074c
[ preserving 436320 bytes of netbsd ELF symbol table ]
Copyright (c) 1996, 1997, 1998, 1999, 2000
    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 1.5 (GENERIC) #1: Sun Nov 19 21:42:11 MET 2000
    fvdl@sushi:/work/trees/netbsd-1-5/sys/arch/i386/compile/GENERIC
cpu0: Intel Pentium (P54C) (586-class)
total memory = 48764 KB
avail memory = 40064 KB
using 635 buffers containing 2540 KB of memory
BIOS32 rev. 0 found at 0xf0000
mainbus0 (root)
pci0 at mainbus0 bus 0: configuration mode 2
pci0: i/o space, memory space enabled
pchb0 at pci0 dev 0 function 0
pchb0: Intel 82434LX/NX PCI, Cache and Memory Controller (PCMC) (rev. 0x11)
siop0 at pci0 dev 1 function 0: Symbios Logic 53c810 (fast scsi)
siop0: interrupting at irq 11
scsibus0 at siop0: 8 targets, 8 luns per target
pcib0 at pci0 dev 2 function 0
pcib0: Intel 82378ZB System I/O (SIO) (rev. 0x03)
vga1 at pci0 dev 6 function 0: S3 86C928 (rev. 0x00)
wsdisplay0 at vga1
tlp0 at pci0 dev 8 function 0: Lite-On 82C115 Ethernet, pass 2.5
tlp0: interrupting at irq 15
tlp0: Ethernet address 00:a0:cc:e0:30:b2
tlp0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX
isa0 at pcib0
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
pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 mux 0
wdc0 at isa0 port 0x1f0-0x1f7 irq 14
wd0 at wdc0 channel 0 drive 0: <Maxtor 98196H8>
wd0: drive supports 16-sector pio transfers, lba addressing
wd0: 78167 MB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 160086528 sectors
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5
lpt0 at isa0 port 0x378-0x37b irq 7
pcppi0 at isa0 port 0x61
midi0 at pcppi0: PC speaker
sysbeep0 at pcppi0
isapnp0 at isa0 port 0x279: ISA Plug 'n Play device support
npx0 at isa0 port 0xf0-0xff: using exception 16
fdc0 at isa0 port 0x3f0-0x3f7 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB, 80 cyl, 2 head, 18 sec
isapnp0: no ISA Plug 'n Play devices found
biomask 6f67 netmask ef67 ttymask ffe7
scsibus0: waiting 2 seconds for devices to settle...
sd0 at scsibus0 target 0 lun 0: <SEAGATE, ST32171N, 0484> SCSI2 0/direct fixed
siop0: target 0 now synchronous at 10.0Mhz, offset 8
sd0: 2062 MB, 5172 cyl, 5 head, 163 sec, 512 bytes/sect x 4223444 sectors
sd1 at scsibus0 target 1 lun 0: <SEAGATE, ST15230N, 0638> SCSI2 0/direct fixed
siop0: target 1 now synchronous at 10.0Mhz, offset 8
sd1: 4095 MB, 3992 cyl, 19 head, 110 sec, 512 bytes/sect x 8386733 sectors
cd0 at scsibus0 target 6 lun 0: <TOSHIBA, CD-ROM XM-4101TA, 0064> SCSI2 5/cdrom removable
boot device: sd0
root on sd0a dumps on sd0b
root file system type: ffs
Enter pathname of shell or RETURN for sh: 


--
entropy -- it's not just a good idea, it's the second law.