I have a RealTek RTL8139 PCMCIA ethernet card and am running Puppy 2.13 on an old Toshiba Portege 3025 laptop. I am getting an error: kernel: cs: pcmcia_socket0:cardbus cards are not supported However, I also have the slackware-derived Vector Linux installed, and when I boot with that, the card work...

Looks like so:
http://www.murga-linux.com/puppy/viewtopic.php?t=15180