Shadow Options Group - Digital Equipment DIGITAL Server 7100 1200 Service Maintenance Manual

SCU Features

Shadow Options Group

Menu Fields
Shadow video
BIOS ROM
Shadow C8000h-
CBFFFh
Shadow CC00h-
CFFFFh
Shadow D0000h-
D3FFFh
Shadow D4000h-
D7FFFh
Shadow D8000h-
DBFFFh
Shadow DC000h-
DFFFFh
(1)
Factory default setting
3-8
Settings
(1)
Enabled
Disabled
(1)
Disabled
Enabled
(1)
Disabled
Enabled
(1)
Disabled
Enabled
(1)
Disabled
Enabled
(1)
Disabled
Enabled
(1)
Disabled
Enabled
Comments
The main logic board reserves an area of DRAM for a
copy of video BIOS ROM. This DRAM called
"shadow memory" is write-protected and has the
same addresses as the video BIOS ROM locations.
When you shadow video BIOS ROM, the ROM image
is copied into an appropriate area in DRAM. This
increases the server's performance because the
video BIOS instructions are in fast DRAM instead of
low speed ROM. For PCI VGA devices, video BIOS
is always shadowed in C0000h-C7FFFh, regardless
of this field's setting.
Allows you to disable or enable the shadowing
request for optional ROM at the corresponding
addresses.
Allows you to disable or enable the shadowing
request for optional ROM at the corresponding
addresses.
Allows you to disable or enable the shadowing
request for optional ROM at the corresponding
addresses.
Allows you to disable or enable the shadowing
request for optional ROM at the corresponding
addresses.
Allows you to disable or enable the shadowing
request for optional ROM at the corresponding
addresses.
Allows you to disable or enable the shadowing
request for optional ROM at the corresponding
addresses.