JET doesn't require much memory or horsepower from the CPU.
If your computer is powerful enough to run Windows 95/98/NT, then it's fast
enough to run JET. For example a 66MHz 486 with 16 MB of memory should do just
fine, even though you might notice some sluggishness while scrolling the map if
you don’t have an accelerated display adapter.
With 255 or fewer colors, the JET counters and map graphics may display the incorrect colors, which can be very confusing. A 16-bit color depth (65536 colors) or more is recommended.
JET works at resolutions beginning from 640*480. However, at low resolutions you will see only a small part of the map at one time. I personally recommend at least 1024*768 resolution, but it's really a matter of taste.