Without these, PSX emulation will be slow or glitchy.
If you tell me the exact device (model and year) you’re installing RetroBoot 121 on, I’ll produce a device-specific step-by-step with exact key combos, file names, and commands. retroboot 121 install
Download the latest build from a trusted source like the Libretro forums or the PSC RetroBoot GitHub. Without these, PSX emulation will be slow or glitchy