Unable to get Reicast working - "Unknown opcode"

Libretro Cores
#1

I’m getting an error whenever I try starting any game with Reicast. When I launch from the command line, a Window is created but immediately goes away. I get this at the end of the log output:

REIOS: Booting up

Freeing fpcb

Unimplemented opcode: 0000FFFF next_pc: AC008302 pr: AC00043C msg: Unknown opcode [libretro INFO] Fatal error : iNimp reached

in cpu_iNimp -> core/hw/sh4/interpr/sh4_opcodes.cpp : 66 DEBUGBREAK!

I have dc_bios.bin and dc_flash.bin inside a ‘system/dc’. I am launching it from the command line like this:

.\retroarch.exe -L .\cores\reicast_libretro.dll ‘D:\ROMs\DC\Sonic Adventure (USA) (En,Ja,Fr,De,Es). gdi’ --verbose

#2

I think your BIOS files are not being found by the core. Can you post the complete log?

You should see in the log where bios files are being loaded from.

#3

You were right. You made me realize I had the BIOS in the system/ folder - but I had modified my RetroArch directories to point to the folder of an older RetroArch version I had so I could share BIOS files. I moved it to the right folder and it works now.