coreboot has something similar to provide an early boot console in a device without "simple" output devices, using the PC speaker[0][1]. I doubt many people use

coreboot has something similar to provide an early boot console in a device without "simple" output devices, using the PC speaker[0][1]. I doubt many people use it, but it's one of the things that can save the day. Although in case of "this corporate computer is air gapped", I wonder what corp policies that little project violated. [0] Sender (highly hardware specific): https://review.coreboot.org/cgit/coreboot.git/tree/src/drivers/pc80/pc/spkmodem.c https://review.coreboot.org/cgit/coreboot.git/tree/src/drive... [1] Receiver: https://review.coreboot.org/cgit/coreboot.git/tree/util/spkmodem_recv/spkmodem-recv.c https://review.coreboot.org/cgit/coreboot.git/tree/util/spkm...