Abit VA-20 User Manual page 41

BIOS Setup 3-13
AGP Fast Write (Disabled)
This item lets you enable or disable the caching of display data for the video memory
of the processor. Enabling this item can greatly improve the display speed. Disable
this item if your graphics display card does not support this feature.
AGP Master 1 WS Write:
This item implements a single delay when writing to the AGP Bus. When set to
[Enabled], two-wait states are used by the system, allowing for greater stability.
AGP Master 1 WS Read:
This item implements a single delay when reading to the AGP Bus. When set to
[Enabled], two-wait states are used by the system, allowing for greater stability.
AGP 3.0 Calibration cycle
Leave this item to its default [Enabled] setting to support AGP 3.0 calibration cycle
operations.
VGA Share Memory Size (32M)
This item allows you to select the shared memory size for VGA usage.
Press <Esc> to return to the Advanced Chipset Features screen.
System BIOS Cacheable (Disabled)
When this item is enabled, the System BIOS will be cached for faster execution.
Video RAM Cacheable (Disabled)
When this is enabled, the Video RAM will be cached resulting to better performance.
However, if any program was written to this memory area, this may result to system
error.
User's Manual