Asus 3DP-V500TX User Manual page 31

B. OPENGL ENVIRONMENT
ExportSingleBufferedModes: If this variable is defined and set to 1 then single
buffered modes are made available via the Display Applet. Note, choosing too high
a resolution may result in insufficient VRAM being available to support accelerated
double buffered rendering. In this case software only rendering will be used instead.
A system reboot is necessary for changes in this variable to take effect.
The following variables may not be supported in future releases, and are not created
by the default installation. Some PCI BIOS allocate invalid physical addresses for
the GLINT memory regions. Setting the following variables override the BIOS speci-
fication and force the physical addresses of the different GLINT PCI address re-
gions. If these variables are used care must be taken to ensure that they are on the
correct boundary for the given region and that different regions do not overlap. Typical
addresses to try are high memory addresses such as 0xA0000000. See the section on
PCI BIOS under known Anomalies and Restrictions" below, for a description of
how to override the physical address for the framebuffer.
AllowAddressOverride: This variable must exist and be set to nonzero in order for
the following registry variables to take effect.
PhysicalAddress.Region0: Specifies the physical address for GLINT control reg-
isters. This value should be on a 128K boundary.
PhysicalAddress.Region1: Specifies the physical address for the localbuffer by-
pass. Currently, this is not mapped in by the driver but it must have a valid physical
address (not zero) which does not conflict with other addresses in the system since
GLINT will respond to accesses in this range. This region should be on an 8MB
boundary and is 8MB in length.
PhysicalAddress.Region2: Specifies the physical address for the framebuffer by-
pass. This address must be on a 32MB boundary and is 4MB in length.
PhysicalAddress.ROMBase: Specifies the physical address for the onboard ROM.
Currently, this is not mapped in by the driver but it must have a valid physical ad-
dress (not zero) which does not conflict with other addresses in the system since
GLINT will respond to accesses in this range. This address must be on a 64KB
boundary and is 64KB in length.
UseBiosAddresses: Normally, the base addresses for PCI devices are allocated by
the NT operating system. Some older X86 machines do not operate correctly if these
addresses are used. In particular, this may apply to older 486 machines. If this vari-
able is defined and set to 1 then the base addresses assigned by the PCI BIOS to the
GLINT chips are used instead of those assigned by the operating system.
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