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BIOS Extensions
These items control the loading (shadowing) of BIOS extensions contained in the FBD main
block #3. Note that there are actually three groups of Setup items to control the shadowing of up
to three BIOS extensions. The screen graphic only shows the first group.
BIOS Extension Offset in FBD
This option selects the source address of the BIOS extension located in the FBD. The address is
an offset from the base of the FBD. The offset range is between 4A000H through 5FFFFH in
8 KB increments. The default is Disabled.
Destination Address
This option selects the target address of the BIOS extension. It can range from C80000H through
DFFFFH in 8 KB increments. The default is D0000H.
BIOS Extension Size
This option selects the number of bytes to copy from the FBD into shadow memory. BIOS exten-
sion sizes can be selected in 8 KB increments from 2000H through 10000H. The default is 2000H.
22 Planar Clean Screen PC User’s Manual
CS Manual LAYOUT#1787 3/9/98 5:33 PM Page 22