From: Boris Pisarcik <boris@acheron.sk>
To: linux-kernel@vger.kernel.org
Subject: Re: Basic Text Mode (was: Re: Question about SysRq)
Date: Wed, 4 Apr 2001 09:44:12 +0200 [thread overview]
Message-ID: <20010404094412.B808@Boris> (raw)
In-Reply-To: <20010331230454.A801@Boris> <000201c0bb97$6c4e4ae0$de00a8c0@homeip.net>
In-Reply-To: <000201c0bb97$6c4e4ae0$de00a8c0@homeip.net>; from eccesys@topmail.de on Mon, Apr 02, 2001 at 04:35:56PM -0000
> It is a very good idea, and to implement quite easy. You just do have to
> diff between three types of video cards (MDA, MGA and HGC vs. CGA and AGA vs. EGA+).
> Then you do direct register writes. For the HGC I did it recently in a DOS proggy
> which switched from text to gfx and back. I had a TSR which simulated a gfx BIOS.
> Only problem is, I lost the source. But I could rewrite and test it on request.
> I even would put it under GPL for the kernel (normally this is a no-no for me),
> just ask me. I will write it in NASM then because I can't the AT&T syntax.
> For non-i386 Platforms I do not know about this topic. (IIRC the Apples didnt
> even have a text mode)
> Maybe I could look up the EGA register values somewhere.
The hardware part of mode restoring could really be done the register way and
may be interesting - i did code a lot in dos and this is what i did too,
if i had experience with register programming and vga(..). Mostly i skipped
this arena, because i have had information about vga registers just enough
to damage monitor, so rather used VESA for video stuff :)
But i think only this way should break some internal state of console or
what driver.
Thanks for the willingness, thought. I read from the thread - James Simmons,
console developer, is working on it, so you may eg. ask to cooperate with him,
he surely has a lot of ideas of text/vga switching in linux.
Cheers B.
next prev parent reply other threads:[~2001-04-04 7:00 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-31 21:04 Question about SysRq Boris Pisarcik
2001-04-02 16:35 ` Basic Text Mode (was: Re: Question about SysRq) Thorsten Glaser Geuer
2001-04-04 7:44 ` Boris Pisarcik [this message]
2001-04-02 23:59 ` Question about SysRq Dr. Kelsey Hudson
2001-04-04 0:39 ` Boris Pisarcik
2001-04-03 22:36 ` Andreas Dilger
2001-04-12 18:51 ` Dr. Kelsey Hudson
[not found] ` <m2n1a1pj8r.fsf@boreas.yi.org.>
2001-04-04 7:12 ` Boris Pisarcik
2001-04-03 2:59 Basic Text Mode (was: Re: Question about SysRq) James Simmons
2001-04-04 7:57 ` Boris Pisarcik
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