no$psx

No$PSX is a capable, no-frills PSX emulator by the developer behind several other emulators, including No$GBA.

Its main goal is to work out of the box: it needs no particular version of Windows, no modified video drivers, no plugins, no virtual CD-ROM drive, no PSX BIOS and no per-game tweaks.

It emulates essentially all of the PSX hardware in some form, although there are always edge cases, so some games may still have issues. A lot of work has gone into making the core as stable as possible.

Like some other top PSX emulators, No$PSX replaces the BIOS with its own clone.

This has two advantages. First, it is free and legal, whereas the PSX BIOS is copyrighted and cannot legally be downloaded. Second, the clone can be faster than the original BIOS, so some games run faster.

The downside is that compatibility may be lower, mainly with games that apply undocumented patches to the BIOS. No$PSX replicates these patches where it can, but it cannot cover all of them.