WarGames was another case of life imitating art imitating life, when the over-the-top NORAD command center set (the director called it "NORAD's wet dream of itself") became the blueprint for command centers everywhere going nuts with monitors.
A NORAD commander is quoted there: "A few years later, I was an executive officer with the Air Force Space Command stationed at Norad near Cheyenne Mountain. And I'm wondering, 'Gee, where can we get such cool-looking displays?' It was a good forcing function. It required us to all of a sudden say, 'If it really can look like this, why doesn't it?'"
Hackers is dripping in 80s cheese
In Ex Machina the main character appears writes a field sieve in Python to break some crypto. The code doesn't actually do that but it's still decent.
A bunch of older movies featured nmap.
It's not exactly a sophisticated effort (using a wardialer and guessing a backdoor password), but it's far better and more realistic than the majority of movie-style "hacking" scenes.
Sneakers, by contrast, has some interesting depictions of social engineering, as well as the amusingly low-tech yet effective approach of "point a camera at someone's hands while they type a password" (which remains a realistic danger today).
Hackers is dripping in 80s cheese, but that was what made it fun. And it captures how people thought hacking worked and what kinds of things people thought it could do: type something into a computer and take over a city's streetlights.