It may be already fixed
PCMCIA on Toshiba laptops
PCMCIA Socket not recongized in a Tecra 700CT (Bernardo Gil)
Date: 1999, Dec 30
From: David Hinds <email@example.com>
I assume that the other socket works fine? You may have better luck
with a newer PCMCIA driver package.
to: "It may be already fixed"