There were hiatuses in its development but ePSXe still remains as one of the best emulators for PSX games.
Features and Highlights
ePSXe is distributed in a zip package.
Among the files within the archive there is an exe file named ePSXe.exe.

Double-hit it and the config window will appear.
Note that HLE BIOS is known to be less compatible.
You should use either SCPH1001 (US) or SCPH7502 (PAL) BIOS.

At this moment these two are recommended by the developers.
While it’s possible for you to use other BIOSes, these two are the most common.
ePSXe supports keyboard and joystick.
Additionally, it includes emulation for digital and analog joypads, Dual Shock, and PSX mouse.
you could configure these emulations in the sixth step of the Wizard Guide.
Regardless of the legal issues, ePSXe provides the cheapest way possible to play PlayStation games.
Perhaps youre a retro gamer, or perhaps you own a broken PlayStation and miss the old days.
No matter which you are, ePSXe is here to give you a hand.