: It helps tricky games run smoothly without glitches.

The standard PSP PS1 emulator (POPS) evolved over various firmware updates. Some games ran better on older firmware versions, while others required newer ones. The psxonpsp660.bin file is the BIOS image associated with the 6.60 firmware version of the emulator. Users often need to place this file in specific directories (such as /seplugins/popsloader/ ) to allow the plugin to load the correct BIOS for a specific game.