[BRLTTY] BRLTTY in GRUB2

[Dave Mielke]

[quoted lines by Vladimir 'φ-coder/phcoder' Serbinenko on 2012/04/03 at 01:52 +0200]

>> It looks like charset_grub.c hasn't been formally added to the repository as it 
>> isn't in my copy.
>Weird it is there:
>http://bzr.savannah.gnu.org/lh/grub/branches/brltty/annotate/head:/grub-core/braille/brltty/Programs/charset_grub.c

I tried wget, which gave me an xml file. I guess (well, I actually know) I 
don't know this bzr stuff very well. Which command do I use to get the file 
with that URL?

>> Does grub have a way to manage the modem control lines (DTR, RTS), and to query 
>> CTS,DSR? If so, which functions do so, and where are the constants they rely on 
>> defined? As you may have guessed, I'm using serial_grub.c as a test case for 
>> compiling since I want to find out what it needs anyway.
>>
>It doesn't. Do you have documentation on which flags we have to set in
>registers?

We have code for MS-DOS which already works. I'm guessing that it'll work on 
Grub as well. I can think of only two areas where it mightn't - 
disabling/reenabling interrupts, and reading/writing ports. How are these four 
operations performed in grub?

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