I gave Dungeon Master (one of my all-time faves) a quick test. It looks as though the save game function is broken on your extended ADF's. When you try to save your game a message box pops up telling you to insert the Dungeon Master disk in DF0.
I imagine that Chaos Strikes Back will have the same problem. The save game function displays the version number and it show v2.2 which seems to be the common version of the original release of DM. My original copy is also v2.2 so I don't think its an alternate version.
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