How can I get a psp emulator and games for it to play on my computer?

I want to get an psp emulator and games for it for my computer because I can’t get a psp for right now. I want to know where i can get it for free online and how to work it. I don’t mean an emulator for the psp I mean an emulator for the computer to play psp games like how they have the visual gameboy for the comp. I have windows xp. Someone please help.