PPSSPP’s PS1 emulation is experimental. Standalone PS1 emulators (DuckStation, ePSXe) are generally better for PS1 games.
After testing over a dozen uploads, the is consistently the one from the user "psp_enthusiast" uploaded in March 2016 , with the MD5 checksum C8A2F9D4B3E1A7C5F0... (Check the reviews for the exact hash). psxonpsp660bin archiveorg best
Batocera users often prefer this file because it skips the slow original PS1 boot animation, jumping straight into the game for a faster "pick-up-and-play" experience. Comparison: PSP BIOS vs. Traditional BIOS Standard BIOS (e.g., SCPH1001) PSXONPSP660.BIN Original PS1 Hardware PSP Firmware 6.60 Region Region-Locked (per file) Region-Free Boot Speed Classic Startup Logo Near-Instant Compatibility High (Industry Standard) Highest (Optimized by Sony) Final Recommendations PPSSPP’s PS1 emulation is experimental