</a> We strongly encourage all hardware vendors to make their programming guides and register specifications publicly available. The following documentation is available for free public download.

• Most older 3com adapters
  • 3C359
  • 3C501
  • 3C503
  • 3C505
  • 3C507
  • 3C515
  • 3C523
  • 3C527
  • 3C589D
  • 3C59x
  • 3C5x9, 3C5x9B
  • 3C90x, 3C90xB
  • 3C90xC
• DEC/Intel
  • 21040
  • 21041
  • 21145
  • 21143 (“tulip”)
  • 21145
  • 82558
  • GD82559ER
  • e100, e1000
• Jato JT1001
• National Semiconductor
  • DP83815 (“natsemi”)
  • DP83821
  • DP83840A
• Neterion
  • Xframe I (big endian version)
  • Xframe I (little endian version)
• RealTek
  • 8130
  • 8139
  • 8139A
  • 8139B
  • 8139C
  • 8139C+ (“8139too”, “8139cp”)
  • 8169 (“r8169”)
• SiS
  • 7014
  • 7016
  • 900 (“sis900”)
• SMSC LAN83C175
• VIA VT86C100A (“via-rhine”).
• Xircom X3201-3

Jeff Garzik archives many of these, and other non-NIC specifications at http://gkernel.sourceforge.net/specs/.