Biostar U8668 U8668 BIOS setup guide - Page 16

FB Address Conversion, FB Close Prediction

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BIOS Setup FB Address Conversion Setting this bit further optimizes the MA table for VGA frame buffer accesses according to the DRAM page size in use. Setting this should improve VGA performance especially in tiling address mode. This but cannot be used the same time as CPU Direct Access FB mode. If used, this bit must be set before enabling the internal VGA to prevent display corruption. The Choices: Enabled, Disabled (default). FB Page Close Prediction This feature automatically close the FB DRAM pages that are no longer needed in tiling address mode. This bit can be set / cleared any time. This feature will show maximum performance increase if frame buffer address conversion is also enabled. The Choices: Enabled, Disabled (default). - 15 -

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BIOS Setup
- 15 -
FB Address Conversion
Setting this bit further optimizes the MA table for VGA frame buffer accesses
according to the DRAM page size in use. Setting this should improve VGA
performance especially in tiling address mode. This but cannot be used the
same time as CPU Direct Access FB mode. If used, this bit must be set before
enabling the internal VGA to prevent display corruption.
The Choices:
Enabled,
Disabled
(default).
FB Page Close Prediction
This feature automatically close the FB DRAM pages that are no longer needed
in tiling address mode. This bit can be set / cleared any time. This feature will
show maximum performance increase if frame buffer address conversion is also
enabled.
The Choices:
Enabled,
Disabled
(default).