I recently installed DOS 6.22 on an old laptop. By old, I mean a core2duo with 4GB of ram. It was hilarious to me that I needed to google the correct settings to use to get a game that requires 4MB to work on a machine with 4GB.
My actual goal was to setup QBasic for my son, which I did-- but he thought it was stupid and refused to even let me show him how to code a Hello World app on it. :(