Microsoft open-sourced MS-DOS 4.0.

[Eleven]

I think most if not all I did on DOS was 6.22 and I have nothing but good memories of tweaking autoexec.bat and config.sys to get specific games to run, and poking around in qbasic before I knew any other languages even existed.

Funny how different it was back then, games were just coming out and not working without effort if you weren't on the latest system or whatever the most common was at the least, and a lot of people were cool with that. I was a kid and wasn't paying the bills so maybe that helped