To use real fonts and system files, you must place them in a folder named flash0 within your PSP directory.
The PPSSPP BIOS is a fascinating piece of retro gaming history. It represents the "secret sauce" that Sony used to make the PlayStation Portable work. However, in the world of emulation, bigger is not always better.
Keep in mind that using custom firmware or an older firmware version can affect game compatibility. Some games may require specific firmware versions to run properly.
For the vast majority of users, The emulator is powerful enough to handle almost the entire PSP library using its built-in systems. Only pursue BIOS/Firmware files if you are a purist who wants the original boot screen or if you are playing a specific niche title with text rendering bugs.
folder, though this is a compatibility fix rather than a traditional BIOS requirement.