What is Legacy mode?

And I dont mean A64 legacy mode btw
I have 3 NIC on an old server but only 1 will ever work, the other 2 show up in 'legacy mode' and apparently that means I need to free up some resources.
The full specs are,
P133
160mb edo ram
4 2gig SCSI drives
CD ROM
PCI s3 virge VGA card
PCI internal modem
2 ISA 3com 10mbps NIC
1 ISA SMC 10mbps NIC

legacy mode means they are using old drivers or settings try updating the,

Are they fully plug-n-play NIC cards? Check in the hardware properties to see if there are any problems. Either way you may have to download the setup utility from the manufacture and make sure the IRQ and I/O addresses are not confilicting.

You should be able to find what you need here:

http://support.3com.com/infodeli/tools/nic/

An idea of what do to here: http://www.le.ac.uk/cc/dsss/docs/3c5x9cfg.shtml

Thanks for those links Movax thats exactly what i was looking for. The only thing i still need to ask is when windows says that other devices need to be disabled to free up resources, does that mean the cards are conflicting with something else? I tried disabling the serial and parralel ports as I dot use them anyway but they still have the yellow exclamation marks on. Is it likely just running the setup utility will get rid of the conflicts?