This is the network driver which is used for MSVPC 2007.
I spotted it during a WIP-backport-experiment of the driver, when compiling with GCC4.7.2, which warned about it.
GCC8.4.0 unfortunately is blind to that on master head, for unknown reasons. Not good.
MSVC github buildbot is also blind to that on master head, for unknown reasons. Not good.
We later found that at least Clang did also warn about it on master head.
These adapters were common in DEC Alpha boxes and they are really rare
nowadays. The 21140 chip is emulated in Connectix / Microsoft Virtual PC
and Hyper-V Gen 1 VM.
This is an experimental driver, not yet tested on real hardware.
CORE-8724