Because last year I helped somebody with a 4.4 pf.conf, this machine
had a disk with OpenBSD 4.4 on it.  I copied the bsd.rd of the latest
snapshot to "/" in order to install the snapshot.
The installer correctly detected a multi-processor machine and thus
installed bsd.mp as bsd kernel

# ls -l /bsd*
-rw-r--r--  1 root  wheel  9013244 Feb 12 12:54 /bsd
-rw-r--r--  1 root  wheel  6427696 Feb 12 12:54 /bsd.rd
-rw-r--r--  1 root  wheel  8993610 Feb 12 12:54 /bsd.sp

This  kernel however fails to detect the second CPU

OpenBSD 5.1 (GENERIC.MP) #187: Sat Feb 11 12:30:14 MST 2012
    [email protected]:/usr/src/sys/arch/i386/compile/GENERIC.MP
cpu0: Intel Pentium III ("GenuineIntel" 686-class) 857 MHz
cpu0: 
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PSE36,MMX,FXSR,SSE
real mem  = 536342528 (511MB)
avail mem = 517455872 (493MB)
mainbus0 at root
bios0 at mainbus0: AT/286+ BIOS, date 02/20/02, BIOS32 rev. 0 @
0xf0230, SMBIOS rev. 2.3 @ 0xfa920 (44 entries)
bios0: vendor AOpen version "V4.0 R1.22    EN" date 02/20/2002
bios0: AOpen DX34 Plus
apm0 at bios0: Power Management spec V1.2
acpi at bios0 function 0x0 not configured
pcibios0 at bios0: rev 2.1 @ 0xf0200/0xb00
pcibios0: PCI IRQ Routing Table rev 1.0 @ 0xfa290/176 (9 entries)
pcibios0: PCI Interrupt Router at 000:07:0 ("VIA VT82C686 ISA" rev 0x00)
pcibios0: PCI bus #1 is the last bus
bios0: ROM list: 0xc0000/0xbc00
cpu0 at mainbus0: (uniprocessor)
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "VIA VT82C691 PCI" rev 0xc4
viaagp0 at pchb0: v2
agp0 at viaagp0: aperture at 0xe0000000, size 0x10000000
ppb0 at pci0 dev 1 function 0 "VIA VT82C598 AGP" rev 0x00
pci1 at ppb0 bus 1
vga1 at pci1 dev 0 function 0 "NVIDIA GeForce2 MX" rev 0xa1
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
pcib0 at pci0 dev 7 function 0 "VIA VT82C686 ISA" rev 0x22
pciide0 at pci0 dev 7 function 1 "VIA VT82C571 IDE" rev 0x10: ATA66,
channel 0 configured to compatibility, channel 1 configured to
compatibility
pciide0: channel 0 disabled (no drives)
wd0 at pciide0 channel 1 drive 1: <WDC AC21600H>
wd0: 16-sector PIO, LBA, 1549MB, 3173184 sectors
wd0(pciide0:1:1): using PIO mode 4, DMA mode 2
uhci0 at pci0 dev 7 function 2 "VIA VT83C572 USB" rev 0x10: irq 5
viapm0 at pci0 dev 7 function 4 "VIA VT82C686 SMBus" rev 0x30: SMI
iic0 at viapm0iic0: addr 0x20 01=01 02=02 03=03 04=04 05=05 06=06
07=07 08=08 09=09 0a=0a 0b=0b 0c=0c 0d=0d 0e=0e 0f=0f 10=10 11=11
12=12 13=13 14=14 15=15 16=16 17=17 18=18 19=19 1a=1a 1b=1b 1c=1c
1d=1d 1e=1e 1f=1f 20=20 21=21 22=22 23=23 24=24 25=25 26=26 27=27
28=28 29=29 2a=2a 2b=2b 2c=2c 2d=2d 2e=2e 2f=2f 30=30 31=31 32=32
33=33 34=34 35=35 36=36 37=37 38=38 39=39 3a=3a 3b=3b 3c=3c 3d=3d
3e=3e 3f=3f 41=01 42=02 43=03 44=04 45=05 46=06 47=07 48=08 49=09
4a=0a 4b=0b 4c=0c 4d=0d 4e=0e 4f=0f 50=10 51=11 52=12 53=13 54=14
55=15 56=16 57=17 58=18 59=19 5a=1a 5b=1b 5c=1c 5d=1d 5e=1e 5f=1f
60=20 61=21 62=22 63=23 64=24 65=25 66=26 67=27 68=28 69=29 6a=2a
6b=2b 6c=2c 6d=2d 6e=2e 6f=2f 70=30 71=31 72=32 73=33 74=34 75=35
76=36 77=37 78=38 79=39 7a=3a 7b=3b 7c=3c 7d=3d 7e=3e 7f=3f 81=01
82=02 83=03 84=04 85=05 86=06 87=07 88=08 89=09 8a=0a 8b=0b 8c=0c
8d=0d 8e=0e 8f=0f 90=10 91=11 92=12 93=13 94=14 95=15 96=16 97=17
98=18 99=19 9a=1a 9b=1b 9c=1c 9d=1d 9e=1e 9f=1f a0=20 a1=21 a2=22
a3=23 a4=24 a5=25 a6=26 a7=27 a8=28 a9=29 aa=2a ab=2b ac=2c ad=2d
ae=2e af=2f b0=30 b1=31 b2=32 b3=33 b4=34 b5=35 b6=36 b7=37 b8=38
b9=39 ba=3a bb=3b bc=3c bd=3d be=3e bf=3f c1=01 c2=02 c3=03 c4=04
c5=05 c6=06 c7=07 c8=08 c9=09 ca=0a cb=0b cc=0c cd=0d ce=0e cf=0f
d0=10 d1=11 d2=12 d3=13 d4=14 d5=15 d6=16 d7=17 d8=18 d9=19 da=1a
db=1b dc=1c dd=1d de=1e df=1f e0=20 e1=21 e2=22 e3=23 e4=24 e5=25
e6=26 e7=27 e8=28 e9=29 ea=2a eb=2b ec=2c ed=2d ee=2e ef=2f f0=30
f1=31 f2=32 f3=33 f4=34 f5=35 f6=36 f7=37 f8=38 f9=39 fa=3a fb=3b
fc=3c fd=3d fe=3e ff=3f words 00=0000 01=0101 02=0202 03=0303 04=0404
05=0505 06=0606 07=0707
iic0: addr 0x24 20=20 21=20 22=20 23=20 24=20 25=20 26=20 27=20 28=20
29=20 2a=20 2b=20 2c=20 2d=20 2e=20 2f=20 30=20 31=20 32=20 33=20
34=20 35=20 36=20 37=20 38=20 39=20 3a=20 3b=20 3c=20 3d=20 3e=20
3f=20 40=40 41=40 42=40 43=40 44=40 45=40 46=40 47=40 48=40 49=40
4a=40 4b=40 4c=40 4d=40 4e=40 4f=40 50=40 51=40 52=40 53=40 54=40
55=40 56=40 57=40 58=40 59=40 5a=40 5b=40 5c=40 5d=40 5e=40 5f=40
60=60 61=60 62=60 63=60 64=60 65=60 66=60 67=60 68=60 69=60 6a=60
6b=60 6c=60 6d=60 6e=60 6f=60 70=60 71=60 72=60 73=60 74=60 75=60
76=60 77=60 78=60 79=60 7a=60 7b=60 7c=60 7d=60 7e=60 7f=60 80=80
81=80 82=80 83=80 84=80 85=80 86=80 87=80 88=80 89=80 8a=80 8b=80
8c=80 8d=80 8e=80 8f=80 90=80 91=80 92=80 93=80 94=80 95=80 96=80
97=80 98=80 99=80 9a=80 9b=80 9c=80 9d=80 9e=80 9f=80 a0=a0 a1=a0
a2=a0 a3=a0 a4=a0 a5=a0 a6=a0 a7=a0 a8=a0 a9=a0 aa=a0 ab=a0 ac=a0
ad=a0 ae=a0 af=a0 b0=a0 b1=a0 b2=a0 b3=a0 b4=a0 b5=a0 b6=a0 b7=a0
b8=a0 b9=a0 ba=a0 bb=a0 bc=a0 bd=a0 be=a0 bf=a0 c0=c0 c1=c0 c2=c0
c3=c0 c4=c0 c5=c0 c6=c0 c7=c0 c8=c0 c9=c0 ca=c0 cb=c0 cc=c0 cd=c0
ce=c0 cf=c0 d0=c0 d1=c0 d2=c0 d3=c0 d4=c0 d5=c0 d6=c0 d7=c0 d8=c0
d9=c0 da=c0 db=c0 dc=c0 dd=c0 de=c0 df=c0 e0=e0 e1=e0 e2=e0 e3=e0
e4=e0 e5=e0 e6=e0 e7=e0 e8=e0 e9=e0 ea=e0 eb=e0 ec=e0 ed=e0 ee=e0
ef=e0 f0=e0 f1=e0 f2=e0 f3=e0 f4=e0 f5=e0 f6=e0 f7=e0 f8=e0 f9=e0
fa=e0 fb=e0 fc=e0 fd=e0 fe=e0 ff=e0 words 00=0000 01=0000 02=0000
03=0000 04=0000 05=0000 06=0000 07=0000
iic0: addr 0x25 01=01 02=02 03=03 04=04 05=05 06=06 07=07 08=08 09=09
0a=0a 0b=0b 0c=0c 0d=0d 0e=0e 0f=0f 10=10 11=11 12=12 13=13 14=14
15=15 16=16 17=17 18=18 19=19 1a=1a 1b=1b 1c=1c 1d=1d 1e=1e 1f=1f
20=20 21=21 22=22 23=23 24=24 25=25 26=26 27=27 28=28 29=29 2a=2a
2b=2b 2c=2c 2d=2d 2e=2e 2f=2f 30=30 31=31 32=32 33=33 34=34 35=35
36=36 37=37 38=38 39=39 3a=3a 3b=3b 3c=3c 3d=3d 3e=3e 3f=3f 40=40
41=41 42=42 43=43 44=44 45=45 46=46 47=47 48=48 49=49 4a=4a 4b=4b
4c=4c 4d=4d 4e=4e 4f=4f 50=50 51=51 52=52 53=53 54=54 55=55 56=56
57=57 58=58 59=59 5a=5a 5b=5b 5c=5c 5d=5d 5e=5e 5f=5f 60=60 61=61
62=62 63=63 64=64 65=65 66=66 67=67 68=68 69=69 6a=6a 6b=6b 6c=6c
6d=6d 6e=6e 6f=6f 70=70 71=71 72=72 73=73 74=74 75=75 76=76 77=77
78=78 79=79 7a=7a 7b=7b 7c=7c 7d=7d 7e=7e 7f=7f 80=80 81=81 82=82
83=83 84=84 85=85 86=86 87=87 88=88 89=89 8a=8a 8b=8b 8c=8c 8d=8d
8e=8e 8f=8f 90=90 91=91 92=92 93=93 94=94 95=95 96=96 97=97 98=98
99=99 9a=9a 9b=9b 9c=9c 9d=9d 9e=9e 9f=9f a0=a0 a1=a1 a2=a2 a3=a3
a4=a4 a5=a5 a6=a6 a7=a7 a8=a8 a9=a9 aa=aa ab=ab ac=ac ad=ad ae=ae
af=af b0=b0 b1=b1 b2=b2 b3=b3 b4=b4 b5=b5 b6=b6 b7=b7 b8=b8 b9=b9
ba=ba bb=bb bc=bc bd=bd be=be bf=bf c0=c0 c1=c1 c2=c2 c3=c3 c4=c4
c5=c5 c6=c6 c7=c7 c8=c8 c9=c9 ca=ca cb=cb cc=cc cd=cd ce=ce cf=cf
d0=d0 d1=d1 d2=d2 d3=d3 d4=d4 d5=d5 d6=d6 d7=d7 d8=d8 d9=d9 da=da
db=db dc=dc dd=dd de=de df=df e0=e0 e1=e1 e2=e2 e3=e3 e4=e4 e5=e5
e6=e6 e7=e7 e8=e8 e9=e9 ea=ea eb=eb ec=ec ed=ed ee=ee ef=ef f0=f0
f1=f1 f2=f2 f3=f3 f4=f4 f5=f5 f6=f6 f7=f7 f8=f8 f9=f9 fa=fa fb=fb
fc=fc fd=fd fe=fe ff=ff words 00=0000 01=0101 02=0202 03=0303 04=0404
05=0505 06=0606 07=0707
iic0: addr 0x27 01=01 02=02 03=03 04=04 05=05 06=06 07=07 08=08 09=09
0a=0a 0b=0b 0c=0c 0d=0d 0e=0e 0f=0f 10=10 11=11 12=12 13=13 14=14
15=15 16=16 17=17 18=18 19=19 1a=1a 1b=1b 1c=1c 1d=1d 1e=1e 1f=1f
20=20 21=21 22=22 23=23 24=24 25=25 26=26 27=27 28=28 29=29 2a=2a
2b=2b 2c=2c 2d=2d 2e=2e 2f=2f 30=30 31=31 32=32 33=33 34=34 35=35
36=36 37=37 38=38 39=39 3a=3a 3b=3b 3c=3c 3d=3d 3e=3e 3f=3f 40=40
41=41 42=42 43=43 44=44 45=45 46=46 47=47 48=48 49=49 4a=4a 4b=4b
4c=4c 4d=4d 4e=4e 4f=4f 50=50 51=51 52=52 53=53 54=54 55=55 56=56
57=57 58=58 59=59 5a=5a 5b=5b 5c=5c 5d=5d 5e=5e 5f=5f 60=60 61=61
62=62 63=63 64=64 65=65 66=66 67=67 68=68 69=69 6a=6a 6b=6b 6c=6c
6d=6d 6e=6e 6f=6f 70=70 71=71 72=72 73=73 74=74 75=75 76=76 77=77
78=78 79=79 7a=7a 7b=7b 7c=7c 7d=7d 7e=7e 7f=7f 80=80 81=81 82=82
83=83 84=84 85=85 86=86 87=87 88=88 89=89 8a=8a 8b=8b 8c=8c 8d=8d
8e=8e 8f=8f 90=90 91=91 92=92 93=93 94=94 95=95 96=96 97=97 98=98
99=99 9a=9a 9b=9b 9c=9c 9d=9d 9e=9e 9f=9f a0=a0 a1=a1 a2=a2 a3=a3
a4=a4 a5=a5 a6=a6 a7=a7 a8=a8 a9=a9 aa=aa ab=ab ac=ac ad=ad ae=ae
af=af b0=b0 b1=b1 b2=b2 b3=b3 b4=b4 b5=b5 b6=b6 b7=b7 b8=b8 b9=b9
ba=ba bb=bb bc=bc bd=bd be=be bf=bf c0=c0 c1=c1 c2=c2 c3=c3 c4=c4
c5=c5 c6=c6 c7=c7 c8=c8 c9=c9 ca=ca cb=cb cc=cc cd=cd ce=ce cf=cf
d0=d0 d1=d1 d2=d2 d3=d3 d4=d4 d5=d5 d6=d6 d7=d7 d8=d8 d9=d9 da=da
db=db dc=dc dd=dd de=de df=df e0=e0 e1=e1 e2=e2 e3=e3 e4=e4 e5=e5
e6=e6 e7=e7 e8=e8 e9=e9 ea=ea eb=eb ec=ec ed=ed ee=ee ef=ef f0=f0
f1=f1 f2=f2 f3=f3 f4=f4 f5=f5 f6=f6 f7=f7 f8=f8 f9=f9 fa=fa fb=fb
fc=fc fd=fd fe=fe ff=ff words 00=0000 01=0101 02=0202 03=0303 04=0404
05=0505 06=0606 07=0707
iic0: addr 0x2d 00=03 01=01 02=00 03=e0 04=ca 05=3c 0c=9f 0d=7a 0e=22
0f=00 10=03 11=00 12=00 13=e0 14=ca 15=3c 17=3c 18=3c 19=3c 1a=3c
1b=3c 1c=9f 1d=7a 1e=22 1f=00 20=ff 21=57 22=bc 23=bf 24=c3 25=ff
26=57 27=20 28=1f 29=20 2a=f2 2b=3f 2c=5f 2d=50 2e=d0 2f=ad 30=d3
31=ad 32=d1 33=ab 34=ff 35=00 36=ff 37=00 38=32 39=32 3a=37 3b=37
3c=38 3d=ff 3e=00 3f=00 40=03 41=00 42=00 43=e0 44=ca 45=3c 48=00
4a=38 4c=9f 4d=7a 4e=22 4f=00 50=03 51=00 52=00 53=e0 54=ca 55=3c
5c=9f 5d=7a 5e=22 5f=00 60=ff 61=57 62=bc 63=bf 64=c3 65=ff 66=57
67=20 68=1f 69=20 6a=f2 6b=3f 6c=5f 6d=50 6e=d0 6f=ad 70=d3 71=ad
72=d1 73=ab 74=ff 75=00 76=ff 77=00 78=32 79=32 7a=37 7b=37 7c=38
7d=ff 7e=00 7f=00 80=03 81=00 82=00 83=e0 84=ca 85=3c 8c=9f 8d=7a
8e=22 8f=00 90=03 91=00 92=00 93=e0 94=ca 95=3c 9c=9f 9d=7a 9e=22
9f=00 a0=ff a1=57 a2=bc a3=bf a4=c3 a5=ff a6=57 a7=20 a8=1f a9=20
aa=f2 ab=3f ac=5f ad=50 ae=d0 af=ad b0=d3 b1=ad b2=d1 b3=ab b4=ff
b5=00 b6=ff b7=00 b8=32 b9=32 ba=37 bb=37 bc=38 bd=ff be=00 bf=00
c0=03 c1=00 c2=00 c3=e0 c4=ca c5=3c cc=9f cd=7a ce=22 cf=00 d0=03
d1=00 d2=00 d3=e0 d4=ca d5=3c dc=9f dd=7a de=22 df=00 e0=ff e1=57
e2=bc e3=bf e4=c3 e5=ff e6=57 e7=20 e8=1f e9=20 ea=f2 eb=3f ec=5f
ed=50 ee=d0 ef=ad f0=d3 f1=ad f2=d1 f3=ab f4=ff f5=00 f6=ff f7=00
f8=32 f9=32 fa=37 fb=37 fc=38 fd=ff fe=00 ff=00 words 00=0380 01=0080
02=0080 03=e080 04=ca80 05=3c80 06=8180 07=8180
viapm0: 24-bit timer at 3579545Hz
viapm0: HWM disabled
uhci1 at pci0 dev 8 function 0 "VIA VT83C572 USB" rev 0x61: irq 11
uhci2 at pci0 dev 8 function 1 "VIA VT83C572 USB" rev 0x61: irq 9
ehci0 at pci0 dev 8 function 2 "VIA VT6202 USB" rev 0x63: irq 10
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 "VIA EHCI root hub" rev 2.00/1.00 addr 1
xl0 at pci0 dev 10 function 0 "3Com 3c905B 100Base-TX" rev 0x00: irq
10, address 00:10:4b:65:06:b4
exphy0 at xl0 phy 24: 3Com internal media interface
fxp0 at pci0 dev 13 function 0 "Intel 8255x" rev 0x08, i82559: irq 10,
address 00:00:e2:2e:de:cf
inphy0 at fxp0 phy 1: i82555 10/100 PHY, rev. 4
isa0 at pcib0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
com1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
usb1 at uhci0: USB revision 1.0
uhub1 at usb1 "VIA UHCI root hub" rev 1.00/1.00 addr 1
usb2 at uhci1: USB revision 1.0
uhub2 at usb2 "VIA UHCI root hub" rev 1.00/1.00 addr 1
usb3 at uhci2: USB revision 1.0
uhub3 at usb3 "VIA UHCI root hub" rev 1.00/1.00 addr 1
mtrr: Pentium Pro MTRR support
uhidev0 at uhub3 port 1 configuration 1 interface 0 "Unique ICs Unique
ICs mouse" rev 1.00/0.01 addr 2
uhidev0: iclass 3/1
ums0 at uhidev0: 5 buttons, Z dir
wsmouse0 at ums0 mux 0
vscsi0 at root
scsibus0 at vscsi0: 256 targets
softraid0 at root
scsibus1 at softraid0: 256 targets
root on wd0a (13638c594f9986a9.a) swap on wd0b dump on wd0b

The sysctl hw output:

# sysctl hw
hw.machine=i386
hw.model=Intel Pentium III ("GenuineIntel" 686-class)
hw.ncpu=1
hw.byteorder=1234
hw.pagesize=4096
hw.disknames=wd0:13638c594f9986a9
hw.diskcount=1
hw.cpuspeed=857
hw.vendor=AOpen
hw.product=DX34 Plus
hw.version=N/A
hw.serialno=N/A
hw.uuid=Not Set
hw.physmem=536342528
hw.usermem=536330240
hw.ncpufound=1
hw.allowpowerdown=1

The dmesg of 4.9 with both cpu0 and cpu1 detected:

OpenBSD 4.9 (GENERIC.MP) #785: Fri Feb 18 14:16:01 MST 2011
   [email protected]:/usr/src/sys/arch/i386/compile/GENERIC.MP
cpu0: Intel Pentium III ("GenuineIntel" 686-class) 857 MHz
cpu0: 
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PSE36,MMX,FXSR,SSE
real mem  = 536375296 (511MB)
avail mem = 517447680 (493MB)
mainbus0 at root
bios0 at mainbus0: AT/286+ BIOS, date 02/20/02, BIOS32 rev. 0 @
0xf0230, SMBIOS rev. 2.3 @ 0xfa920 (44 entries)
bios0: vendor AOpen version "V4.0 R1.22    EN" date 02/20/2002
bios0: AOpen DX34 Plus
acpi0 at bios0: rev 0
acpi0: sleep states S0 S1 S4 S5
acpi0: tables DSDT FACP APIC
acpi0: wakeup devices PCI0(S1) KBC0(S1) PS2M(S1) UAR1(S1) UAR2(S1)
USB0(S1) USB1(S1)
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: apic clock running at 100MHz
cpu1 at mainbus0: apid 1 (application processor)
cpu1: Intel Pentium III ("GenuineIntel" 686-class) 856 MHz
cpu1: 
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PSE36,MMX,FXSR,SSE
ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 11, 24 pins
acpiprt0 at acpi0: bus 0 (PCI0)
acpicpu0 at acpi0
acpicpu1 at acpi0
acpibtn0 at acpi0: PWBT
bios0: ROM list: 0xc0000/0xbc00
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "VIA VT82C691 PCI" rev 0xc4
viaagp0 at pchb0: v2
agp0 at viaagp0: aperture at 0xe0000000, size 0x10000000
ppb0 at pci0 dev 1 function 0 "VIA VT82C598 AGP" rev 0x00
pci1 at ppb0 bus 1
vga1 at pci1 dev 0 function 0 "NVIDIA GeForce2 MX" rev 0xa1
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
pcib0 at pci0 dev 7 function 0 "VIA VT82C686 ISA" rev 0x22
pciide0 at pci0 dev 7 function 1 "VIA VT82C571 IDE" rev 0x10: ATA66,
channel 0 configured to compatibility, channel 1 configured to
compatibility
wd0 at pciide0 channel 0 drive 0: <Maxtor 90320E2>
wd0: 16-sector PIO, LBA, 3098MB, 6346368 sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2
pciide0: channel 1 ignored (disabled)
uhci0 at pci0 dev 7 function 2 "VIA VT83C572 USB" rev 0x10: apic 2 int 5 (irq 5)
viaenv0 at pci0 dev 7 function 4 "VIA VT82C686 SMBus" rev 0x30: HWM
disabled: can't map PM i/o space
uhci1 at pci0 dev 8 function 0 "VIA VT83C572 USB" rev 0x61: apic 2 int
16 (irq 11)
uhci2 at pci0 dev 8 function 1 "VIA VT83C572 USB" rev 0x61: apic 2 int
17 (irq 9)
ehci0 at pci0 dev 8 function 2 "VIA VT6202 USB" rev 0x63: apic 2 int 18 (irq 10)
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 "VIA EHCI root hub" rev 2.00/1.00 addr 1
xl0 at pci0 dev 10 function 0 "3Com 3c905B 100Base-TX" rev 0x00: apic
2 int 18 (irq 10), address 00:10:4b:65:06:b4
exphy0 at xl0 phy 24: 3Com internal media interface
fxp0 at pci0 dev 13 function 0 "Intel 8255x" rev 0x08, i82559: apic 2
int 18 (irq 10), address 00:00:e2:2e:de:cf
inphy0 at fxp0 phy 1: i82555 10/100 PHY, rev. 4
isa0 at pcib0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
com1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
usb1 at uhci0: USB revision 1.0
uhub1 at usb1 "VIA UHCI root hub" rev 1.00/1.00 addr 1
usb2 at uhci1: USB revision 1.0
uhub2 at usb2 "VIA UHCI root hub" rev 1.00/1.00 addr 1
usb3 at uhci2: USB revision 1.0
uhub3 at usb3 "VIA UHCI root hub" rev 1.00/1.00 addr 1
mtrr: Pentium Pro MTRR support
vscsi0 at root
scsibus0 at vscsi0: 256 targets
softraid0 at root
root on wd0a swap on wd0b dump on wd0b

The 4.9 sysctl hw:

hw.machine=i386
hw.model=Intel Pentium III ("GenuineIntel" 686-class)
hw.ncpu=2
hw.byteorder=1234
hw.pagesize=4096
hw.disknames=wd0:1580bc6962d5b146,fd0:
hw.diskcount=2
hw.cpuspeed=856
hw.vendor=AOpen
hw.product=DX34 Plus
hw.version=N/A
hw.serialno=N/A
hw.uuid=Not Set
hw.physmem=536375296
hw.usermem=536297472
hw.ncpufound=2

I need the machine right now for testing my new Internet line, but in
two or three days, I could install some older snapshots or 5.0 to find
out about which time this regression occurred.

Adriaan

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