I know it's in no way a dosbox goal, but as it has partially worked in official dosbox 0.72 i find it netherless worth mentioning: In dosbox 0.65 the fullscreen win 3.11 command prompt was "usable", only returning to the windows gui via "exit" caused a messed up screen. In official 0.70 the screen did not even get messed up any more. Now, with the current cvs-versions, you are not able to type commands any more and "exit" causes not only a "messed up screen" as in version 0.65 but a complete dosbox crash (dosbox closes).

Im am using the s3 drivers (800x600, 64k colors). I think the problem is the same in normal vga mode.