Date: Sun, 29 Sep 1996 19:14:37 -0700 (PDT) From: Jonathan Mini <j_mini@efn.org> To: Alexey Pialkin <root@abel.pdmi.ras.ru> Cc: msmith@atrad.adelaide.edu.au, emulation@FreeBSD.org Subject: Re: New doscmd available for testing/munching Message-ID: <Pine.SUN.3.95.960929191410.11330B-100000@garcia.efn.org> In-Reply-To: <199609280740.LAA00820@abel.pdmi.ras.ru>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sat, 28 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.
>
> Hmmm. Never seen any card that will make linear access memory for _text_ mode
> somewhere over 1 mb :)
Andyou're only planning on making support for DOS programs that run in
TEXT mode?!?!?
Jon Mini, j_mini@efn.org, mini@4j.lane.edu
GAMMA Development Team
--------------------------------------------------------------------------
"I think I can, I think I can, I think I can...."
little.blue.engine:Reality Protection Fault. (core dumped)
--------------------------------------------------------------------------
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.SUN.3.95.960929191410.11330B-100000>