your PC is not up to the task of running the DOS emulator most likely. DOS emulation takes a lot of juice from a rig to run smoothly. I am fairly certain this is why we havent seen Battlespire for free yet, that was one of the most demanding DOS games made, released shortly before DOS went away in favor of our more modern Windows.
of course, there may be some other reason, but the framerate thing comes up quite a bit and often relates to someone trying this stuff on a 3 or 4 year old PC.
Any 3 or 4 year old PC should have no problem running Daggerfall in DOSbox. It runs fine on my Pentium-III laptop from 2002 with 256 MB of RAM and a 16 MB video card. That thing can just barely run Morrowind (doesn't meet min specs), and it can play Daggerfall just fine, although with longer load times.
Configuration is a big thing with DOSbox, as paladin181 said right after your post. For reference, my cycles setting in the config file is "cycles=max limit 60000". The optimal setting seems to vary for different people, but most seem to report sticking it somewhere between 30000 and 60000 plays best. Having it too high does seem to cause movement physics issues for most people.
I'll take your words for it. It's been a long time since I played and reviewed the title, and I could be misremembering. Although it isn't a "myth," which would presume reading somebody else's account, but my own recollection which, at worst, is at fault.
I could swear, though, that I recall the shock of having to start a dungeon again after a crash, and finding a totally different layout. Hmm...
Interkarma is correct. The layouts of areas never change. Most of the big dungeons in Daggerfall province have become very familiar to long-time players as a result. Yeten's Web still makes me want to tear my hair out.