ethernet + 8051: http://www.8052.com/ -- http://www.8052.com/tcpip/ http://www.cornelius-consult.de/int/intethernet-embedded.html http://web51.hw-server.com/descript.html http://www.circuitcellar.com/library/print/0902/brady/ uip + 8051: http://members.iinet.net.au/~vanluynm/#Downloads Inicializacion de rtl8019as: http://www.circuitcellar.com/library/ccofeature/eady0801/c0801fe5.htm ethernet + microcontroladores: http://www.beyondlogic.org/etherip/ip.htm pic + rtl8019as + ISA: http://elserver.forknet-ar.org/harpo/uch/seminario/ bus ISA: http://www.techfest.com/hardware/bus/isa.htm http://www.interfacebus.com/Design_Connector_PCAT.html uIP: http://www.sics.se/~adam/uip/ UDP/IP Checksum: http://www.netfor2.com/checksum.html http://www.erg.abdn.ac.uk/users/gorry/course/inet-pages/ip-cksum.html