For some reason, OpenBSD cannot map the interrupt for my onboard NIC
(sis900). The card appears under the supported hardware list, and it works
with FreeBSD 6.1-RELEASE, Linux, and Windows. The same problem occurs across
versions 3.9, 4.0, and a snapshot release from December 16, 2006. Thanks in
advance for any assistance.

Here is the output from dmesg:
OpenBSD 4.0 (GENERIC) #0: Fri Dec 15 14:43:51 PST 2006
    [EMAIL PROTECTED]:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: Intel(R) Pentium(R) 4 CPU 1.80GHz ("GenuineIntel" 686-class) 1.82 GHz
cpu0:
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,
SSE2,SS,HTT,TM
real mem  = 234434560 (228940K)
avail mem = 206131200 (201300K)
using 2887 buffers containing 11825152 bytes (11548K) of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+(e4) BIOS, date 01/20/02, BIOS32 rev. 0 @ 0xf1160,
SMBIOS rev. 2.3 @ 0xf30f0 (47 entries)
bios0: HP Pavilion 04 P7477A-ABA 751N
apm0 at bios0: Power Management spec V1.2 (BIOS mgmt disabled)
apm0: APM power management enable: unrecognized device ID (9)
apm0: APM engage (device 1): power management disabled (1)
apm0: AC on, battery charge unknown
apm0: flags b0102 dobusy 0 doidle 1
pcibios0 at bios0: rev 2.1 @ 0xf0000/0x1952
pcibios0: PCI IRQ Routing Table rev 1.0 @ 0xf18d0/128 (6 entries)
pcibios0: PCI Interrupt Router at 000:02:0 ("SiS 85C503 System" rev 0x00)
pcibios0: PCI bus #1 is the last bus
bios0: ROM list: 0xc0000/0xc000 0xcc000/0x4000!
cpu0 at mainbus0
pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
pchb0 at pci0 dev 0 function 0 "SiS 650 PCI" rev 0x01
ppb0 at pci0 dev 1 function 0 "SiS 86C201 AGP" rev 0x00
pci1 at ppb0 bus 1
vga1 at pci1 dev 0 function 0 "SiS 650 VGA" rev 0x00: aperture at
0xf0000000, size 0x400000
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
pcib0 at pci0 dev 2 function 0 "SiS 85C503 System" rev 0x00
ohci0 at pci0 dev 2 function 2 "SiS 5597/5598 USB" rev 0x07: irq 9, version
1.0, legacy support
usb0 at ohci0: USB revision 1.0
uhub0 at usb0
uhub0: SiS OHCI root hub, rev 1.00/1.00, addr 1
uhub0: 3 ports with 3 removable, self powered
ohci1 at pci0 dev 2 function 3 "SiS 5597/5598 USB" rev 0x07: irq 9, version
1.0, legacy support
usb1 at ohci1: USB revision 1.0
uhub1 at usb1
uhub1: SiS OHCI root hub, rev 1.00/1.00, addr 1
uhub1: 3 ports with 3 removable, self powered
pciide0 at pci0 dev 2 function 5 "SiS 5513 EIDE" rev 0xd0: 650: DMA, channel
0 wired to compatibility, channel 1 wired to compatibility
wd0 at pciide0 channel 0 drive 0: <SAMSUNG SV8004H>
wd0: 16-sector PIO, LBA, 76351MB, 156368016 sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5
atapiscsi0 at pciide0 channel 1 drive 0
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <MITSUMI, CR-48X9TE, 5.0D> SCSI0 5/cdrom
removable
atapiscsi1 at pciide0 channel 1 drive 1
scsibus1 at atapiscsi1: 2 targets
cd1 at scsibus1 targ 0 lun 0: <SAMSUNG, DVD-ROM SD-616F, F100> SCSI0 5/cdrom
removable
cd0(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 2
cd1(pciide0:1:1): using PIO mode 4, Ultra-DMA mode 2
auich0 at pci0 dev 2 function 7 "SiS 7012 AC97" rev 0xa0: irq 9, SiS7012
AC97
ac97: codec id 0x41445360 (Analog Devices AD1885)
ac97: codec features headphone, Analog Devices Phat Stereo
audio0 at auich0
sis0 at pci0 dev 3 function 0 "SiS 900 10/100BaseTX" rev 0x90pci_intr_map:
no mapping for pin A
: couldn't map interrupt
"AT&T/Lucent FW322 1394" rev 0x04 at pci0 dev 14 function 0 not configured
"AT&T/Lucent LTMODEM" rev 0x02 at pci0 dev 16 function 0 not configured
isa0 at pcib0
isadma0 at isa0
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
midi0 at pcppi0: <PC speaker>
spkr0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0 port 0xf0/16: using exception 16
pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
pccom1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
biomask ff65 netmask ff65 ttymask ffe7
pctr: user-level cycle counter enabled
uhub2 at uhub1 port 2umass0 at uhub0 port 2 configuration 1 interface 0
umass0: vendor 0x0930 USB Flash Memory, rev 2.00/1.00, addr 2
umass0: using SCSI over Bulk-Only
uhub2: HP Multimedia Keyboard Hub, rev 1.10/0.03, addr 2
scsibus2 at umass0: 2 targets
uhub2: 3 ports with 2 removable, bus powered
uhidev0 at uhub2 port 1 configuration 1 interface 0
uhidev0: HP Multimedia Keyboard Hub, rev 1.10/0.03, addr 3, iclass 3/1
ukbd0 at uhidev0: 8 modifier keys, 6 key codes
wskbd1 at ukbd0 mux 1
wskbd1: connecting to wsdisplay0
uhidev1 at uhub2 port 1 configuration 1 interface 1
uhidev1: HP Multimedia Keyboard Hub, rev 1.10/0.03, addr 3, iclass 3/0
uhidev1: 3 report ids
uhid0 at uhidev1 reportid 1: input=1, output=0, feature=0
uhid1 at uhidev1 reportid 2: input=1, output=0, feature=0
uhid2 at uhidev1 reportid 3: input=3, output=1, feature=1
sd0 at scsibus2 targ 1 lun 0: <, USB Flash Memory, 5.00> SCSI0 0/direct
removable
sd0: 983MB, 983 cyl, 64 head, 32 sec, 512 bytes/sec, 2013184 sec total
dkcsum: wd0 matches BIOS drive 0x80
root on wd0a
rootdev=0x0 rrootdev=0x300 rawdev=0x302

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