Can you recommend a good adapter to use my PS2 controller on PC? Idea is to practice on emulator where I can view memory and test for glitches.

I see 2 products on Amazon that come with 2x controller inputs for under $11. I just don't know anything about their reliability or polling lag.

While I don’t know of any adapters that are good, I have an alternative suggestion. Do you have a PS3 controller? Or really any later-Gen PlayStation controller? All of those are relatively easy to setup to be used (there’s plenty of guides online) because they all connect via USB already.

I stopped at PS2 so no. I didn't think about that but I read through instructions for Dual Shock and 3 and setting up looks easy indeed. Seem like the best idea if I stick to 1 player.