PCE.emu is particular about where it looks for BIOS files. You have two options:
Let me know which step fails, and I'll help you debug further. pce.emu no system card set
You haven't pointed the app to a System Card image. pce.emu no system card set
💡 Always keep your BIOS files in a dedicated "BIOS" folder separate from your games. This makes it easier to point multiple emulators to the same source. pce.emu no system card set