Welcome to "Design Your Own Computer". In this episode we'll add a network protocol stack.

We will be using the TCP/IP stack implementation from https://github.com/cc65/ip65. The main requirements of this protocol stack is to have defined three functions: eth_init, eth_rx, and eth_tx. Fortunately, these functions are already implemented in the previous episodes, so it is very simple to get the protocol stack running.

I'm using the simple Date65 example application. After reset this application first sends out a DHCP request to obtain an IP address from the local router. Then it sends a DNS lookup for the address pool.ntp.org. Finally, it contacts this server to obtain the current date and time, and then displays this on the VGA output.