I did my first legs on MS FS 3 on a Commodore PC 386SX-16. 16 MHz, 4 MB Extended Memory but only 640k for FS. FS3 was installed on a 42 MB hard disk drive. Chicago was some white lines, the river and green land adjacent to the blue Lake Michigan. Together with those few 3D buildings the visuals were sufficient to make my brain whispering to me "You are flying..."