From: Stas Sergeev <stssppnn@pisem.net>
To: linux-msdos@vger.kernel.org
Subject: Re: please explain to me why video/bios shadowing must be disabled to use graphics... -- Victory!!!
Date: Thu, 17 Oct 2002 10:32:40 +0400 [thread overview]
Message-ID: <3DAE5988.1030300@pisem.net> (raw)
Hi.
Bart Oldeman wrote:
>> Doing the reset call from within DOS brings
>> everything back in a sane state.
>> Just wondering, why this reset is needed so badly?
> Just a very rough guess: proper initialization of certain BIOS
> variables in the range 0x400-0x4ff (0040:0000-0040:00ff) ?
Exactly! Plus some int vectors, which I can
easily identify as they are pointing to a
vbios seg.
Now I am getting that vectors together with
0x40:00-ff from /dev/mem, skipping the INIT
and opening the high ports and... - I have a
full-screen VESA!
There are still some minor problems to resolve,
but I expect to get the new video startup code
within a few weeks, just let me play full-screen
GTA a little:)
Oh, and there is still one very bad thing, which
is that we can't open the high ports in a fast
mode (or can we?), so sometimes it works even
slower than xdos... why ioperm() doesn't allow
>0x3ff ports?..
next reply other threads:[~2002-10-17 6:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-17 6:32 Stas Sergeev [this message]
2002-10-17 15:38 ` please explain to me why video/bios shadowing must be disabled to use graphics... -- Victory!!! Bart Oldeman
-- strict thread matches above, loose matches on Subject: below --
2002-10-17 15:58 Stas Sergeev
2002-10-17 16:29 ` Bart Oldeman
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