Enterprise-IV EISA VLB Motherboard User's Guide
71
ADVANCED CMOS SETUP Options,
Continued
Video ROM Shadow C000,32K
This option controls the shadowing and caching of the contents of shadowed Video ROM. In ROM
shadowing, BIOS code is copied from slower ROM to faster RAM. The BIOS is then executed from the
RAM. This option permits the contents of memory locations C0000h – C7FFFh to be copied from ROM to
RAM for quicker execution and controls whether the contents can be written to or read from cache memory.
The settings are:
Setting
Description
Shadowed
(the
BIOS Setup
default)
The contents of video ROM are copied to RAM but cannot be
stored in cache memory.
Disabled
(the Power-On
default)
There is no shadowing or caching or video ROM.
Cached
The contents of video ROM are copied to RAM and can be
stored in cache memory.
You must be reasonably certain that
no application will write to video ROM memory area while
this option is enabled.
Adaptor ROM Shadow C800,32K
Adaptor ROM Shadow D000,64K
Adaptor ROM Shadow E000,64K
These options control shadowing of the contents of the adaptor ROMs that begin at the specified addresses.
These options permit the memory segment beginning at the base address in the option name to be shadowed
from ROM to RAM. The settings are
Enabled
or
Disabled.
The BIOS Setup and Power-On defaults are
Disabled
for all above options.
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