GART range a physical bus address including a size value, which will get fixed up by PCI config process in BIOS. It should not need any touching at a later time on sane systems. It can be reprogrammed in most cases but only with full system awareness. I dont know a regular reason why to do that on current designs.
-Alex. > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Sent: Wednesday, September 17, 2003 12:47 > To: Ryan Underwood > Cc: [EMAIL PROTECTED] > Subject: [Dri-devel] ??: [Dri-devel] what's the meaning of 'Graphics > Aperture' in AGP? > > > I find aperture base address in North bridge PCI offset > 0x10h,for example,in my box,it is 0xb0 00 00 00 > the base address is bus address or virtual address? > It points to somewhere in system memory? > > > > -----????----- > ???: Ryan Underwood [mailto:[EMAIL PROTECTED] > ????: 2003?9?17? 15:51 > ???: [EMAIL PROTECTED] > ??: Re: [Dri-devel] what's the meaning of 'Graphics Aperture' in AGP? > > > > Hi, > > On Wed, Sep 17, 2003 at 03:30:09PM +0800, "Tao, Qian (???? > IES)" wrote: > > I am a newbee in dri. > > Now i am reading agp source code in linux kernel. > > I am not clear about 'Graphics Aperture' > > I download AGP spec 2.0,but it don't say a word about it. > > what's the relationship between the aperture with > graphics memory? > > thanks for any comment or replyBest Regards, > > IIRC, the aperture is the largest region of system memory that may be > used for AGP DIME texture storage. (for Execute Mode) So if > you set the > aperture to 16MB, no more than 16MB of system memory can be used as > non-local texture memory for the AGP card. > > -- > Ryan Underwood, <nemesis at icequake.net>, icq=10317253 > > > ------------------------------------------------------- > This sf.net email is sponsored by:ThinkGeek > Welcome to geek heaven. > http://thinkgeek.com/sf > _______________________________________________ > Dri-devel mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/dri-devel > N??X'u)Y\gbH zG( zx%C'^elqzm?X( ~zwXb?vz > ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
