Realtek 8139 configuration

Hello folks,
  Where can i get Realtek 8139 chip details(from programers 
point
of view)? i perticularly want to know Registers, flags among the 
others
involved in Reveive mode configuration (Rx_mode).
  i want to configure the network card according to my needs
(Receive Broadcast/multicast frames only, frames from a perticular 
source
ethernet address etc.) from linux kernel(2.4.x). i want to switch 
between
such receive modes dynamically. How can i get this?

  please cc to me at [email protected] as i am not a
member of mailing list.

         Thanks for the help in advance.

Regards,
Nitin Kumbhar