Typically, broadband connections require that you have an Ethernet card in your computer to attach to the broadband modem. Then you simply need a TCP/IP stack with the appropriate driver to access the card. I use my A4000T with a Road Runner cable modem for broadband. The Ethernet card I have is an Ariadne-II, but there are others available like the X-Surf (Zorro slot) and the ApNet (PCMCIA). Miami Deluxe is the TCP/IP stack I use, though the author has appeared to have abandoned it. Genesis, which comes with AmigaOS 3.9, should do the trick, too, though it does not natively support DHCP which is usually needed if you do not have a router in between your computer and the broadband modem.
