Specifications

BIOS Configuration

EPC-100 Hardware Reference 3-22

Memory Shadow Sub-menu

The term “shadowing” refers to the technique of copying BIOS extensions from

ROM into DRAM and accessing them from DRAM. This allows the CPU to access

the BIOS extensions much more quickly and generally increases system performance

if many calls to the BIOS extensions are made. The Memory Shadow Sub-menu is

shown below.

Figure 3-10. Memory Shadow Sub-menu.

The shadow regions should be used only if an CompactPCI card is installed in the

system that contains a BIOS extension (ROM) although there is no effect on the

system if a region is shadowed that does not contain a BIOS extension. Note that

each shadow region in the setup menu is 16KB in size. Multiple shadow regions may

have to be enabled if the BIOS extension to be shadowed is larger than 16KB.

System Shadow

This option is not editable since the System BIOS is always shadowed.

Video Shadow

This option is not editable since the VGA BIOS is always shadowed.

Item Specific Help

F1 Hel

↑↓

Select Item -/+ Chan

e Values F9 Setu

Defaults

ESC Exit

←→

Select Menu Enter Select Sub-Menu F10 Previous Values

<Tab>, <Shift-Tab>, or

<Enter> selects field.

Memory Shadow

System Shadow: Enabled

Video Shadow: Enabled

Regions with Legacy Expansion ROMs:

D800-DBFF: [Disabled]

D400-D7FF: [Disabled]

D000-D3FF: [Disabled]

DC00-DFFF: [Disabled]