6-5. Playing with a modem/serial/parallel cable connection
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ZDoom only supports UDP games. However, using Microsoft's Dial-Up Networking (included with Windows 95/98/NT), it should be possible to also play a game on two computers connected with modems or null-modem serial or parallel cables. My only network connection is my Ethernet card, so I haven't actually tried this, but I can't see any reason why it shouldn't work.

If you're running Windows 95, go download Dial-Up Networking 1.3 from http://www.microsoft.com/windows95/downloads/contents/wurecommended/s_wunetworking/dun13win95/default.asp and install it.

If you're running Windows 98, open the "Add/Remove Programs" control panel and click the Windows Setup tab. Choose "Communications" from the components list and click "Details..." If there isn't a check by "Dial-Up Networking" and "Dial-Up Server," check them and click OK. Click OK again to close the control panel.

Now go visit http://www.geocities.com/TimesSquare/Fortress/4004/guide.html and start reading the section entitled "Configuring the Dial-Up-Server." Once you have everything set up, start a game using the instructions for starting a LAN game above.

If you want to use two computers connected directly using a parallel or serial cable, you also have to use Microsoft's Direct Cable Connection.