You will need a “kick.rom” file in sdmc:/3ds/uae3DS.
It must be called “kick.rom”, be a kickstart 1.3 image, and be the 512KB overdumped version.
Description
Port of Chui’s UAE4ALL Amiga 500 emulator (http://chui.dcemu.co.uk/uae4all.html) to Nintendo 3DS