[This is
preliminary documentation and subject to change.]
This is an AGP chipset
driver sample that shows how to write an AGP driver. The sample works as a
driver for the Intel® 440LX/BX® chipset. Currently there is no
corresponding hardware for any 64-bit platform.
The sample is built with
the standard DDK BUILD utility in the standard checked or free DDK build
environment. Simply type build from the
\\Ntddk\Src\Kernel\Agp\Agp440 directory. A successful build produces
Agp440.sys.
An installation file,
Agp440.inf, is provided. Install Agp440.sys by creating an installation
directory containing the Agp440.sys binary and Agp440.inf.
In the .inf file, change the names and PCI IDs as necessary for
your setup. Then, go into Device Manager and right-click on the PCI-PCI
bridge that represents your AGP bridge. Select Properties.
Then select the Driver tab and click the Update Driver button. Follow
the prompts in the Update Driver wizard. On the Locate Driver Files
page, select Specify a Location, and enter the location of your .inf and driver.
Although the Agp440.sys
driver, when built in the XP build environment (in conjunction with AGPLIB),
will also run on Win2K, and Microsoft®
Windows® Server 2003, this has not been extensively
tested. Conversely, when the Agp440.sys driver (and AGPLIB) are built in the Windows Server 2003 build environment, it will not
use the obsolete HAL APIs HalGet/SetBusDataByOffset,
but this type of driver is only compatible on OS versions that support the new
AGP_TARGET_BUS_INTERFACE_STANDARD, i.e., XPSP2, Windows
Server 2003, and higher.
Therefore, if your goal is building a driver for test and inclusion in a
future OS release, you should build in the Windows
Server 2003 build environment, whereas if your goal is to produce a
binary that is compatible across the broadest range of OS releases, you should
build in the XP build environment.
(See Agplib.htm for additional compatibility details.)
See http://intel.com/design/chipsets/440bx/index.htm
for more information on the AGP chipset.
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