XP makes this VERY easy. Just right click on the shortcut for Torin’s Passage and choose ‘Properties’. Go to the Compatibility tab. Select ‘Run in 256 colors’ and ‘Run in 640 x 480 screen resolution. Your screen resolution and color depth will change automatically for you, when ever you start the game and revert back when you exit the game.
You can also play the DOS version of the game in DOSBox.