I'm having performance issues (slow, choppy framerate) with this version compared to some other DOS ports. The particular map that I'm having an issue with is MAP03 of THT: Threnody but I'd suspect there are probably others that would be an issue, I haven't extensively tested WADs with it. In …

Maybe my Google skills are lacking but I can't seem to find this out: what hardware is supported by Windows 98SE out of the box (i.e. drivers are included on the 98SE CD-ROM itself, no need for extra discs or downloads). Is there a full list somewhere?

Best to say which games you're having problems with. And if you have no specific games in mind, then I think worrying about potential compatibility issues with games you might never play is a bad use of time. I was going to say Clans, Mageslayer and Heretic II as the top of the list, but re-testing …

Pretty much what the topic says. As I understand it, CD audio playback from that era works by having the CD drive act as a CD player that's hooked into the sound card, a system that modern DVD players have presumably lost. So even if the game otherwise runs OK on a newer(-ish) system, there's no …