User`s manual

Chapter 5: Running Setup
5-11
Gated Clock
Signal GCLKEN enables internal dynamic clock gating in the GX when a
AGPset "IDLE" state occurs. This happens when the GX detects an idle
state on all its buses. The settings for this option are Enabled or
Disabled . The Enabled setting enables the gated clock.
Graphics Aperture Size
This option specifies the amount of system memory that can be used by
the Accelerated Graphics Port (AGP). The settings are 4 MB , 8 MB , 16
MB , 32 MB , 64 MB , 128 MB , or 256 MB .
Search for MDA (Monochrome Adapter) Range (B0000h-B7FFFh)
Resources
Legacy support requires the ability to have a second graphics controller
(monochrome) in the system. In an AGP system, accesses in the normal
VGA range are forwarded to the AGP bus. Since the monochrome
adapter may be on the PCI (or ISA) bus, the GX must decode cycles in
the MDA range and forward them to PCI. The settings for this option are
Yes or No . Set this option to Yes to let AMIBIOS search for MDA
resources.
AGP Multi-Trans Timer (AGP Clks)
This option sets the AGP multi-trans timer. The settings are in units of
AGP clocks: 32 , 64 , 96 , 128 , 160 , 192 , or 224 .
AGP Low-Priority Timer
This option controls the minimum tenure on the AGP for low priority data
transaction for both read and write. The settings are Disabled, 32, 64,
96, 128, 160, 192 or 224 .
AGP SERR (Advanced Graphic Port System Error)
GX asserts this signal to indicate a AGP system error condition. The
settings for this option are Enabled or Disabled . Set to Enabled to
enable the AGP SERR# signal.
AGP Parity Error Response
The settings for this option are Enabled or Disabled . Set to Enabled to
enable the AGP (Accelerated Graphics Port) to respond to parity errors.