I have up to date version of Nozoomer and No$gba and everytime i start bios for a rom that needs bios to run, it gives me an error undefined opcode – with no debug vector defined. I used the eNDs Patcher These are my files:http://i1080.photobucket.com/albums/j337/DanteMez12/Screenshot.jpg
You are using a patched rom - firmware.bin in the same folder will patch AP of clean roms - cause of error undefined opcode If they had patch it right it should not have happend
and make sure you have all the required files that are needed for the BIOS, but this error mostly caused by rom that was not patched very well, with some compatibility issues between patched rom, and No$gba+No$Zoomer.