The three Seibu SPI system games (Raiden Fighters, Raiden Fighters Jet, Viper Phase 1) all want a 2MB file named [setname].nv with a CRC32 of zero. Is this a bug, or do they signify that the sound emulation is not working properly for this system?
Are Senkyu/Battle Balls and Raiden Fighters 2 in for the next version? Or are they waiting on emulation improvements? Would OST samples help any with improving the YMF-271F?
Oh, I get it. You have to run it in MAME and have it go through the 999 timer update thing, and then copy the file from the NVRAM folder. That should probably be added to the readme file.
Other SPI games are technically possible but in reality turned out not to work in M1. Given that Seibu's sound department is nominally staffed by tone-deaf monkeys who happened to get breathtakingly lucky with Raiden and Raiden II I wasn't especially interested in delaying the last release to figure out why.
