Date: Thu, 26 Sep 1996 14:59:43 -0700 (PDT) From: Jonathan Mini <j_mini@efn.org> To: Alexey Pialkin <root@abel.pdmi.ras.ru> Cc: Michael Smith <msmith@atrad.adelaide.edu.au>, emulation@freebsd.org Subject: Re: New doscmd available for testing/munching Message-ID: <Pine.SUN.3.95.960926145659.28799F-100000@garcia.efn.org> In-Reply-To: <199609251122.PAA09645@abel.pdmi.ras.ru>
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On Wed, 25 Sep 1996, Alexey Pialkin wrote:
> > Actually, you mmap /dev/vga which roots at the base of video memory. This
> > is much cleaner, not to mention safer.
>
> BTW, why ?
Say you're running on a SVGA/VESA 2.x video card and FreeBSD has code in
it to use that (hah and double hah) -- VESA 2.x allows the card to create
a linear framebuffer in the WAY-UP-HIGH mem addrs like 4G range. Using
this, video memory for the cons wouldn't BE at 0xA000 like you're trying
to map. But /dev/vga would be properly redirected.
Jon Mini, j_mini@efn.org, mini@4j.lane.edu
GAMMA Development Team
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"I think I can, I think I can, I think I can...."
little.blue.engine:Reality Protection Fault. (core dumped)
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