Here's a strange one. Cantao (on CC) bought what he thought was a cheap 
realtek PCI NIC, it actually turns out it is a Rsltek (yes, Rsltek) 
8139D card.

It includes an old (2.4/2.5) driver which claims to be for Silan SC92031 
(attached).

The driver has some very obvious similarities with 8139too, however the 
register layout and usage is quite different.

Has anyone got any idea whats going on here? It seems like something 
based on a realtek chip, but not...

Daniel