Emulator :
Emulator is name of a program that makes a game (not PC game..) runs on your PC. But the emulator only run games that fit with it. You need the ps 1 emulator to play ps 1 games, ps 2 emulator to play ps 2 games, etc. You can't play ps 2 games with ps 1 emulator.
For example :
Ps 1 emulator that usually used in PC named PSX. If you want to play Bishi Bashi (one of ps 1 games), you have to use the PSX emulator in order to run the game.But you must turn the game into the image file first (.iso, .bin, etc..). If you don't, you can't play the game. You will need a program that can makes a image file from a game. The program that usually runs perfectly was ImgBurn. You can get this program here :http://www.imgburn.com/index.php?act=download
and this video maybe help you how to make an image file using this ImgBurn :
http://www.youtube.com/watch?v=jY5PH_Q4tdo
Here's some emulator that I have been using until now :
Notes : I only want to share what I know about this.. So, please understand if I make some mistakes here.
Game Boy Advance Emulator
This emulator is one of the most easiest emulator on PC. The name is VISUAL BOY ADVANCE, and you don't need to configure it. This requires :PII 450
128 MB RAM
DirectX 7
Recommended:
PIII 600
256 MB RAM
DirectX 8
You can get this emulator here :
http://www.emuparadise.me/Nintendo%20Gameboy%20Advance_Emulators/Windows/Visual_Boy_Advance/245
PS 1 Emulator
This emulator is kind of simple and easy to use. You don't need to configure it specifically, just configure the control button for your keyboard and choosing your bios in order to run this emulator perfectly. I used PSX v1.13. It runs perfectly on my PC.
You can get this emulator for your PC here :
or
PS 2 Emulator
The ps 2 emulator I've been using is PCSX v0.9.8. Ps 2 emulator is kinda confusing, because you'll have to configure it until the detail. This emulator also requires a higher system in order to run smoothly.
You can get this emulator here (including bios file and plugins) :
This is some video that will help you to configure your emulator (I think is totally working) :
If you want to download games for your PC and emulator, maybe you can get it here :- For normal and high-configured PC : http://www.youtube.com/watch?v=1BQgpyuFLxQ
- For slow-configured PC : http://www.youtube.com/watch?v=HOH5gP0tD6w
http://emuparadise.me/
http://emulator-zone.com/
Here's some of my video with PSX v1.13 :
http://www.youtube.com/watch?v=hX_8MDjPHuw
http://www.youtube.com/watch?v=YGJE-cEmQp8