Of course, you can't put all the different DSP files into the firmware directory all named "", or they'd overwrite each other. If the program running on the µPD7725 isn't exactly the DSP1 software, it doesn't make sense to put "dsp1" in the filename, so higan uses "upd7725" in the filename for all DSP-like chips. When we're talking about Super Mario Kart specifically, it expects the µPD7725 to be running the DSP1 software, but you might want to replace it with one of the other DSP programs just to see what happens, or even with a homebrew program that doesn't infringe Nintendo's copyright. Much like higan is a program that runs on an x86_64 processor, "DSP1" is a program that runs on a "µPD7725" processor, and so are "DSP1B", "DSP2", "DSP3" and "DSP4". Is this a bug, or am I missing something? However, when I load Pilotwings (USA).sfc, I get the "Error: missing required data " message. Super Mario Kart now works great with no issues. With bsnes v107 on Windows 10, I dropped the "" and "" files into /firmware and renamed them to "" and "", respectively. Ok, here's a somewhat weird one, Screwtape:
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