RNDIS (Remote Network Driver Interface Specification) is a Microsoft proprietary protocol used mostly on top of USB. It provides a virtual Ethernet link to most versions of the Windows operating system. A partial RNDIS specification is available from Microsoft, but Windows implementations have been observed to issue requests not included in that specification, and to have undocumented constraints. In addition, the protocol is tightly coupled to Microsoft's programming interfaces and models, most notably the Network Driver Interface Specification (NDIS), which are alien to operating systems other than Windows. These issues complicate third-party implementations.
The USB Implementers Forum (USB-IF) defines at least three non-proprietary USB Communications Device Class (CDC) protocols with comparable "virtual Ethernet" functionality; one of them (CDC-ECM) predates RNDIS and is widely used for interoperability with non-Microsoft operating systems, but it has no native Windows support.
Various driver packs are below for support all the way down to Windows 2000.
GP2X Rndis Drivers Pack for Windows
File: RNDIS Drivers Pack.zip
c9df733c6d5c3bc8810b52e4c8f08bbe504a5bf88b8145cb90756bf92191e67e
GP2X Rndis Drivers Pack for Windows
File: RNDIS_XP_x64.zip
1e7e1451d18cc06414ad91a0ecd7b9145927736490bc024bd7435f561b7fa6ca
