Graphics address remapping table

This article was entered on the pages of quality assurance on July 22, 2020 . Please help to improve it and please take part in the discussion ! The following still needs to be improved:  Wikify if encyclopaedically relevant Hardware uncle ( discussion ) 19:03, Jul 22, 2020 (CEST)

Graphics address remapping table (GART) is an IOMMU and is used by graphics cards which are connected to the motherboard via the AGP or PCIe bus systems . GART gives the graphics card direct memory access to the main memory of the central processing unit.

This enables data exchange between the main memory and the memory of the graphics card and can be used for paging , for example . Another application is the expansion of the video memory when the CPU processes the graphics itself, e.g. with Intel HD Graphics .

The GART hardware is initialized by a driver specific to the chipset. The operating system allocates memory to the GART. In this way, a graphics card can use 32 or 64 MB in the dynamic random access memory, for example. The memory space is used dynamically, ie as required, in smaller blocks up to the maximum value specified by the BIOS .

Web links

• https://www.cs.umd.edu/users/meesh/cmsc411/website/projects/agp/hardwareagp.htm

Individual evidence

1. ↑ Klaus Dembowski: PC Workshop II - Magnum: Printer, Scanner, Accessories, Volume 2, 2004, p. 217
2. ↑ Dave Dzatko, Tom Shanley: AGP System Architecture, 2000, P. 69
3. ↑ Mike Meyers: CompTIA A + Certification All-in-One Exam Guide, Seventh Edition, 2010, p. 849
4. ^ Klaus Dembowski: PC workshop, Volume 1, 2005, p. 160