[BRLTTY] BRLTTY in GRUB2
Dave Mielke
dave at mielke.cc
Mon Apr 2 20:03:32 EDT 2012
[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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