Recently one of these PCMCIA cards came in to my hands. I was very interested in getting it to work because I don't own any PCMCIA 16bit (non-cardbus) ethernet cards that are not Type III (the fat Xircom ones). It seems to use the Intel 82595 ethernet controller.
Unfortunately, it seems that although there was a linux driver for this card at some point, it was never integrated upstream, so it became unmaintained and very difficult to find.
This driver, silpcmcia-1.02b.tar.gz, originally hosted at www.silicom.co.il/linux.htm (Web Archive Link) seemed to have fallen off the intarwebs.
After some e-mails I finally got someone to send me this file (thanks!). Here it is, in hopes that it doesn't get lost again:
(Courtesy of tuxmobil.org)
For completeness, other related, useful files:
pcmcia-cs-3.0.9.tar.gz mirrors: 2 3 4
pcmcia-cs-3.2.8.tar.gz mirrors: 2 3 4
Another driver sil_cs, which should work for 2.4 kernels (the silpcmcia one is for 2.2), and is based on the etherexpress pro/10 driver. It was originally hosted at http://lemon.malinov.com/sil_cs/ (Web Archive to the rescue).
This one is also hard to find, but thankfully web archive kept a copy of the files:
http://web.archive.org/web/20070411141642/http://lemon.malinov.com/sil_cs/sil_cs-1.0a.tar.bz2 (courtesy of archive.org)
http://web.archive.org/web/20070411141642/http://lemon.malinov.com/sil_cs/sil_cs-1.0b.tar.bz2 (courtesy of archive.org)
Conclusion: there seems to be no usable driver for 2.6 kernels, so if you found this site hoping for a quick download, I'm sorry. I'm trying to preserve this info in hopes that someday a bored kernel hacker might pick this up :) . If you do have some info/something that you think is useful about this card, please DO post in the comments section.
As an addendum, it's a pity that small files like these just fall off the internet, never to be found again. As a fan of older computers, it's disappointing when you can't find that old bios or configuration file because all sites linked to the same 20kb file, and when the original site hosting it went down, nobody had a backup link.
Some related links:
Update: One of the mirrors stopped working, removed.