Sp5001-a.bin Mame -

The sp5001-a.bin file is the raw digital dump of that microcontroller's internal memory (BIOS/Firmware).

It is likely you need a full, up-to-date jvs13551.zip archive. Many community posts on forums and Reddit (in threads about MAME, RetroPie, or LaunchBox) indicate that the root cause of the issue is often an incomplete or outdated device ROM set for the NAOMI system. Sp5001-a.bin Mame