Chilly Willy from DCEmulation has made an update to his DC for Doom that fixed the networking mode bugs. This port can technically be considered an addition to the online games for Dreamcast.
Original post with download link: http://dcemulation.org/phpBB/viewtopic. ... 2&t=100351
Download with original files(doom shareware wad) and self boot image: http://www.megaupload.com/?d=VXQZIKI9
How to play in network mode:
1. Boot up Doom then enter 'Network Settings' menu.
2. From DCDoom readme.txt:
"To start a two player game of DOOM:
1: Make certain both players are using identical WAD files and
game settings.
2: The first player should make sure Play Network Game is 'on',
the Player Number is set to '1', and that Network Player #1
is set to the network address of the second player." (Go into Network Type Settings menu to enter IP address of other players)
"3: The second player should make sure Play Network Game is 'on',
the Player Number is set to '2', and that Network Player #1
is set to the network address of the first player.
To start a three player game of DOOM:
1: Make certain all players are using identical WAD files and
game settings.
2: The first player should make sure Play Network Game is 'on',
the Player Number is set to '1', that Network Player #1 is
set to the network address of the second player, and that
Network Player #2 is set to the network address of the third
player.
3: The second player should make sure Play Network Game is 'on',
the Player Number is set to '2', that Network Player #1 is
set to the network address of the first player, and that
Network Player #2 is set to the network address of the third
player.
4: The third player should make sure Play Network Game is 'on',
the Player Number is set to '3', that Network Player #1 is
set to the network address of the first player, and that
Network Player #2 is set to the network address of the second
player."
3. Adjust other settings as desired. Make sure everyone else that will be playing uses the same settings.
4. Back out of Network Mode menu and press B to start Doom when ready. Player 1 is the host and must start their game first. Then other players can join and the game will start once all players have connected.
When scheduling games you might want to show interest by creating a topic and private messaging anyone who wants to play so you can keep your IP address private.
Bugs:
The On Screen Keyboard will not correctly input the IP address (at least when using VGA out). You will have to use a Keyboard for now. I contacted Chilly Willy about this.
Be sure to read the readme: