Emulation is legal. Dumping your own BIOS is legal. Downloading a proprietary file from the internet is not. The choice, ultimately, rests on your respect for digital rights and your tolerance for risk. But armed with this knowledge, you now understand exactly what psxonpsp660.bin is—not just a file, but a tiny, elegant piece of Sony’s engineering history, repurposed by a generation of gamers determined to keep the past alive.
If you cannot locate this specific file, or if it does not work for your setup, consider these alternatives: psxonpsp660bin bios file
The PSX on PSP 6.60 BIN BIOS file is a specific BIOS file designed for PSP consoles running firmware version 6.60. This file enables the PSP to run PSX games, which are essentially PS1 games that have been optimized for the PSP. The "BIN" extension indicates that the file is a binary file, which contains machine-readable code that the PSP can execute. Emulation is legal