Which server are you looking for?
csircd is an ircd written 99% from scratch (mostly from 1998 thru 1999), but still based on the broken 2.8.21 protocol. This server currently has only been tested as a client server, but may work fine as a HUB as well. The protocol is compatable with EFNet's network, but can be used elsewhere. Biggest feature: You can upgrade your server to new code without having to restart it.
irc2.8.21+CS is old 2.8.21 with many modifications, including +TS, added to it. This code is also for EFnet and works great as a HUB server. It's not as efficient as ircd/comstud, though.