my first PC was a 286 also. It had the 'Turbo' button that machines used to have. Im not sure what version of DOS I ran but it was before Windows existed.
The first computer I played flightsim on was my brothers. It was 8086 with no hard drive and 4 meg of ram I think. I remember that we would play some games on that that were written in Turbo Pascal and when I tried to play them on my 286, they were just a blur they went so fast. and now we cant get machines fast enough.