You can legally download the latest firmware .PUP files from the PlayStation Website .
Depending on your setup, these files must be placed in specific directories for the software to recognize them: : ux0:data/retroarch/system .
We compare firmware versions 1.00–3.74 across three criteria:
For the , what users typically refer to as "BIOS" are actually the Official Firmware (PUP) and Font Package files. These are essential for emulators like Vita3K to run system modules and render text correctly. Essential Files for PS Vita Emulation
Do not trust YouTube videos promising a "100% working BIOS pack" – those often contain malware or corrupted dumps from the PSTV. Stick to the official Vita3K firmware installer, dump your own console if you have one, and you will be playing Persona 4 Golden on your PC in no time.