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By the way I find that the info below is pretty uninformative
as to what device you have:
pci0 at mainbus0 bus 0: configuration mode 1
vendor 0x8086 product 0x1250 (class bridge, subclass host, revision
0x03) at pci0 dev 0 function 0 not configured
vendor 0x8086 product 0x7000 (class bridge, subclass ISA, revision 0x01)
at pci0 dev 7 function 0 not configured
vendor 0x5333 product 0x8811 (class display, subclass VGA, revision
0x44) at pci0 dev 16 function 0 not configured
ep1 at pci0 dev 17 function 0: 3Com 3C905 Ethernet
ep1: no connectors! address 00:c0:4f:bd:3b:0b
ep1: interrupting at irq 11

And all the info is in pci/ to produce a kinder, gentler output
(from my PCI):
pci0 at mainbus0 bus 0: configuration mode 1
 host bridge rev 0x02: Intel 82440FX (Natoma) PCI and Memory Controller at pci0 dev 0 function 0 not configured
 ISA bridge rev 0x01: Intel 82371SB (Triton II) PCI-ISA Bridge at pci0 dev 1 function 0 not configured
ep1 at pci0 dev 10 function 0: 3Com 3C905 Ethernet
ep1: 8KB word-wide FIFO, (undefined) Rx:Tx split, no connectors!
ep1: MAC address 00:60:97:26:43:c0
ep1: default medium MII, autoselect on
ep1: interrupting at irq 10
 VGA display rev 0x01: Matrox MGA Millenium 2064W at pci0 dev 13 function 0 not configured

I find the vendor/product numbers not very helpful.