Atari 400 in 1982. Spent many hours fooling around with this. Eventually got a floppy drive and was running a very primitive version of Flight Simulator. You;d fly a while then the game would stop completely for a minute or so while the disc spun to load more scenery. In the late 80s I tried to sell it on a local ad paper, got no response and it went in the dumpster.
The first PC I used at work was in 1990. 386 with a math coprocessor 1 Meg of RAM and an 80 meg hard drive. thats MEGs not Gig kids, that was a top level PC then, cost $3000.