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Is there a refernce manual for programming NIC... like programming PCI NIC RTL8139

Further, How many such NIC providers (vendors) are present. Is it possible to program for alll.... is there a standard to which all these providers adhere?

I'll be really thankfull if any one can show me a programmer's reference manual for NICs like we have it for intel chips....

There used to be a basic set of requirements that all NICs used, NE2000 compliance. However, I don't know how relavent it is today and I can't imagine all the lowlevel programability was the same for each NIC. There are other examples out there to be sure, but varied results occur when searching. Here are a couple other links:

http://www.osdever.net/documents/DP8390 ... ?the_id=46
http://www.osdever.net/documents/DP8390 ... ?the_id=47
http://www.osdever.net/documents/Writin ... ?the_id=56

This should at least give you an idea. Also, I recall that RealTek had some information on their site, so you can check there too.

try this: http://www.alldatasheet.com/datasheet-p ... 8139A.html

cooollll.... this really helps a lot...