B683/B680
Video BIOS Shadow
It determines whether video BIOS will be copied to RAM, however, it is
optional from chipset design. Video shadow will increase the video speed.
Enabled:
Video shadow is enabled
Disabled:
Video shadow is disabled
C8000-CBFFF Shadow/DC000-DFFFF Shadow
These categories determine whether optional ROM will be copied to RAM by
16K byte.
Enabled:
Optional shadow is enabled
Disabled:
Optional shadow is disabled
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