Looking for 82559 Software Developer's Manual

I'd like to do some low-level programming of the 82559 on the Ethernet PCI card supplied with the IXP1200 development system. The datasheet, "82559 Fast Ethernet Multifunction PCI/CardBus Controller (rev 2.0)," does not provide enough information; it does refer to a "10/100 Mbit Family Software Developer's Manual." However, there is no mention of this manual on http://developer.intel.com. Anyone know where I can get a copy of this? -Scott