Problem with detection of network card at boot time

[halusiak at atlas.sk]

Hi there, I am using FreeBSD-5.3 and have the following problem:
I tried to install it on my old computer, and a I cann't let it to detect my network card ( 3com 3C900-COMBO ) which is
suposed to be suported by the xl(4) driver. But my computer just cann't detect it and I also tried to use other card, or
other pci slot, also, bios does detect it. I think that it could be caused by the series of ``unknown: <PNP0xxx> can't assign
resources (port)'' errors I am receiving on boot time, what are those, why do I always get them? Is that why FreeBSD cann't
detect my network card? I have a Award bios. Thanks for any help, here is the dmesg log:

<--------------------- dmesg --------------------->

Copyright (c) 1992-2004 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights reserved.
FreeBSD 5.3-RELEASE #0: Fri Nov  5 04:19:18 UTC 2004
    root at harlow.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Cyrix 6x86MX (187.93-MHz 686-class CPU)
  Origin = "CyrixInstead"  Id = 0x600  Stepping = 0  DIR=0x0852
  Features=0x80a135<FPU,DE,TSC,MSR,CX8,PGE,CMOV,MMX>
real memory  = 33554432 (32 MB)
avail memory = 23388160 (22 MB)
npx0: [FAST]
npx0: <math processor> on motherboard
npx0: INT 16 interface
cpu0 on motherboard
isa0: <ISA bus> on motherboard
orm0: <ISA Option ROMs> at iomem 0xe8000-0xebfff,0xc0000-0xc7fff on isa0
pmtimer0 on isa0
ata0 at port 0x3f6,0x1f0-0x1f7 irq 14 on isa0
ata1 at port 0x376,0x170-0x177 irq 15 on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x64,0x60 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
fdc0: <NEC 765 or clone> at port 0x3f0-0x3f5 irq 6 drq 2 on isa0
fdc0: [FAST]
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode
ppbus0: <Parallel port bus> on ppc0
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
unknown: <PNP0303> can't assign resources (port)
unknown: <PNP0501> can't assign resources (port)
unknown: <PNP0501> can't assign resources (port)
unknown: <PNP0400> can't assign resources (port)
unknown: <PNP0700> can't assign resources (port)
Timecounter "TSC" frequency 187928170 Hz quality 800
Timecounters tick every 10.000 msec
ad2: 407MB <WDC AC1425F/27.25C38> [827/16/63] at ata1-master PIO3
acd0: CDRW <CD-W524E/1.0B> at ata1-slave PIO4
Mounting root from ufs:/dev/ad2s1a

<--------------------- dmesg --------------------->