In order to provide faster, free flow of information for MAME's developers and users, the MAME team has set up two IRC channels.
The most important rule is don't be an ass. If you're on good behavior and treat others well, you'll be treated well. Also see freenode's code of conduct.
The official location of MAME's IRC channels is irc.freenode.net
Channel #mame is used for user support and general social discussion. This channel does not require that you register your nickname.
Channel #mame-dev is used for developer discussion. It is NOT a MAME-usage support channel, and user questions will be directed to #mame. This channel DOES require nickname registration. See the instructions on nickname registration for further details.