Abit LM6E Pentium II User Manual page 44

3-16
Shadowing address ranges (DC000-DFFFF Shadow):
This option allows you to decide if the memory block (BIOS) of an
interface card at the address DC000-DFFFF uses the shadow feature or
not. If you have no interface card using this memory block, don't enable
this option.
Computer
SHADOW
knowledge
What is the SHADOW? The BIOS of standard video or
interface cards is stored in ROM, and it is often very slow.
With the Shadow feature, the CPU reads the BIOS on the
VGA card and copies it into RAM. When the CPU runs this
BIOS, the operation is speeded up.
Chapter 3