[BRLTTY] BRLTTY in GRUB2

[Dave Mielke]

What's the danger of losing a serial device character if the device isn't 
polled for a while?

Am I correct that fetching from a serial port returns an unsigned byte (0-255), 
and that no preprocesisng (like UTF-8) is done?

Is any kind of flow control (like RTS/CTS) supported? If so, how is it set?

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