How Did Rogue Generate Its Random Dungeons?

Once every few years I find myself dumping many many hours into Nethack (the open source successor to rogue). Never once have I beaten it, despite playing usually with several tabs open to various wikis and guides. Eventually I die while on a super long run (by my standards) and totally give up in frustration, beginning the next several-year dormant period until the next time I play.

To any game developer planning to call their game with random upgrades a "rogueli[tk]e": play Nethack. Your favorite roguelike was almost certainly created by someone who did.

I never got into Rogue, though I did love Nethack. If you’re into these actual rogue-likes, I picked up Caves of Qud recently, highly recommend.

More generally:

https://roguebasin.com/index.php/Articles#Dungeons

https://roguebasin.com/index.php/Articles#Map

I missed a definition for "random".

Did it have a specific PRNG and seed?

Was it platform–dependent?