Article author here. You're correct; the article should have read "Doom", not "Quake". And further, Doom had not yet been open-sourced. I'm checking with Jesse

Article author here. You're correct; the article should have read "Doom", not "Quake". And further, Doom had not yet been open-sourced. I'm checking with Jesse now but my assumption is that he talked to someone at id and they sent along a snippet of code that showed how to talk to the IPX network driver. I've made corrections and -- once I've heard back from Jesse -- will include additional details. Thanks!