[BRLTTY] BRLTTY in GRUB2

[Dave Mielke]

[quoted lines by Vladimir 'φ-coder/phcoder' Serbinenko on 2012/03/30 at 02:03 +0200]

>> What's the danger of losing a serial device character if the device isn't 
>> polled for a while?
>Relatively high unfortunately if UART buffer (16 characters AFAIR) is
>overflown it starts discarding characters. If polling speed isn't enough
>in practice we could start using interrupts but only to extend buffer,
>not to have a complete interrupt handler.

Brltty's serial implementation for grub can read and buffer as many bytes as 
possible each time brlttyUpdate() is called. How often will grub be calling 
brlttyUpdate()?

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