Re: LPT

["Vladimir 'φ-coder/phcoder' Serbinenko" <phcoder@gmail.com>]

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On 01/07/2011 03:18 PM, Kirill Kuprijanov wrote:
> On 14.12.2010 23:23, Vladimir 'φ-coder/phcoder' Serbinenko wrote:
>> On 12/14/2010 08:54 PM, Kirill Kuprijanov wrote:
>>> Hello,
>>>
>>> I have a motherboard with LCD indicator attached to it's LPT port. I
>>> would like to make grub show some early splash screen on it. All the
>>> things regarding protocol and pin assignments are ok, as I already
>>> have a programm to show stuff on LCD from OS (Debian). So the question
>>> is "how to make a grub module that is capable of setting levels on LPT
>>> pins?" and a second one is "how to make use of it during bootup
>>> procedure?
>>>
>> Currently GRUB has no LPT driver whatsoever. You would need to write
>> one. I suggest having look in our tree at ns8250.c (serial driver),
>> hello.c (module usage). As for how to write LPT driver, old DOS
>> documentation is usually of assistance (nothing changed there).
>
> Does that mean LPT driver is actually a grub module (just to prove me
> right)? 
I would write it as a separate module.
> Then what about some code to show the splash itself? Should it be a
> second separate module or should I place it in some other place?
>
It must be at least be in a separate file and use a sane interface to
LPT port. When it's done this way, whether it's compiled into separate
module or not is just 2 lines of change
>>> Thanks in advance,
>>> Kirill
>>>
>>>
>>> _______________________________________________
>>> Grub-devel mailing list
>>> Grub-devel@gnu.org
>>> http://lists.gnu.org/mailman/listinfo/grub-devel
>>>
>>
>>
>>
>>
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>
>
>
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-- 
Regards
Vladimir 'φ-coder/phcoder' Serbinenko



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