I had a bit of a brainwave regarding what might be happening with this spkmodem output. I was hoping to collect peoples thoughts in regards to weather I might be at least possibly on the right track.
When I enable spkmodem in the coreboot config, I get output from the PC speaker. But spkmodem-recv interprets the tones as consistent gibberish. The output is consistent with a mismatch in the baud rates, but there appears no apparent way to select anything different in the spkmodem-recv software. If the CPU is running coreboot as fast as possible while receiving those instructions from a relatively slow SPI bus. Is it possible that I've somehow overclocked the SPI bus, leading to a mismatch in the baud rates?
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