The graphics address remapping table GART , sometimes known as the graphics translation table GTT ref cite web author freedesktop.org url http dri.freedesktop.org wiki GART title GART accessdate 2010 03 05 ref , is an IOMMU I O memory management unit IOMMU used by Accelerated Graphics Port AGP and PCI Express graphics card s. The GART allows the graphics card direct memory access to the host system memory, through which buffers of texture mapping textures , polygon mesh es and other data are loaded. It s used as a means of data transfer between primary storage physical memory and video memory , but can also be used to expand the amount of video memory available for graphics cards particularly for cards with no dedicated video memory, such as Intel integrated graphics. Operating system support Jeff Hartmann served as the primary maintainer of the Linux agpgart driver, which began as part of Brian Paul s Utah glx accelerated Mesa computer graphics Mesa 3D driver project. The developers primarily targeted Linux 2.4.x kernels, but made patches available against older 2.2.x kernels. Dave Jones heavily reworked agpgart for the Linux 2.6x kernels, along with more contributions from Jeff Hartmann. ref http www.linuxsymposium.org archives OLS Reprints 2003 Reprint Jones OLS2003.pdf Ugly Ducklings Resurrecting unmaintained code agpgart adapted for Linux 2.6 kernel ref In FreeBSD, the agpgart driver ref http www.freebsd.org cgi man.cgi?agpgart agpgart 4 manpage. ref appeared in FreeBSD 4.1. AGPgart support was introduced into Solaris operating system Development release Solaris Express Developer Edition as of its 7 05 release. ref cite web url http docs.sun.com app docs doc 819 2254 agpgart io 7i title agpgart io manpage accessdate 2007 12 04 work docs.sun.com publisher Sun Microsystems ref References Reflist Category Graphics hardware Compu graphics stub fr AGPgart it Agpgart ... more details
Orphan date February 2009 NvAGP is a part of the nVIDIA kernel module on Unix like systems, Linux , BSD , etc. , that enables access to the graphics card through Accelerated Graphics Port AGP . In some cases, it is slower and less stable than agpgart . For certain supported motherboard chipsets, nVIDIA recommends the NvAGP driver instead see Appendix F of nVIDIA s README for your driver, available from their http www.nvidia.com object unix.html Unix driver page . Agpgart is usually preferable except where noted above , so it is given priority in the system. Even if you have NvAGP 1 in xorg.conf , agpgart will be loaded. To use NvAGP, you must either completely remove agpgart from the kernel or boot with the agp off option. Category Nvidia Category Video cards Unix stub ... more details
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