Ethernet card speed

I have a set of fairly new systems: one at home and one at work. Both
systems have the same problem, but I will use the data from the home system.

eth0 is the ethernet device on the mother board. eth1 is a add-on board.

I have a 10/100MB 3com card in my laptop. It doesn't seem to matter
which ethernet card I plug into, I always get a 10MB connection speed.
The laptop connects just fine at 100MB at work.

How do I get the devices to try and connect at 100MB?

**** Data ***


eth0: Realtek RTL8201 PHY transceiver found at address 1.
eth0: Using transceiver found at address 1 as default
eth0: SiS 900 PCI Fast Ethernet at 0xcc00, IRQ 5, 00:e0:06:f1:f8:bb.
eth0: Media Link On 10mbps half-duplex

eth1: RealTek RTL-8029 found at 0xc800, IRQ 11, 52:54:00:DB:D0:4D.
ne2k-pci.c:v1.02 10/19/2000 D. Becker/P. Gortmaker
http://www.scyld.com/network/ne2k-pci.html