Pro tip: The Japanese BIOS ( scph1000.bin ) works but will display Japanese text in console menus. Stick with scph1001.bin for English-language games.
An Architectural and Technical Analysis of ePSXe 1.9.0: BIOS Integration and Plugin Subsystems
If you want, I can:
Which of those would you like?
To run games with maximum compatibility, you need a BIOS file extracted from a physical PlayStation console.
ePSXe (enhanced PSX emulator) 1.9.0 is a widely used PlayStation (PS1) emulator on desktop platforms. This article explains what BIOS and plugins are, why they matter for ePSXe, how to obtain and configure them, common compatibility considerations, and troubleshooting tips. (This is a technical guide—do not use copyrighted BIOS files unless you legally own the original console.)