Digital Equipment PRIORIS ZX 6000 MP SERIES, Руководство пользователя

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SCU Features
C-8
Shadow Options Group
Menu Fields Settings Comments
Shadow video
BIOS ROM Enabled
(1)
Disabled
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.
Shadow
C8000h-
CBFFFh Disabled
(1)
Enabled
Allows you to disable or enable the shadowing
request for optional ROM at the
corresponding addresses.
Shadow CC00h-
CFFFFh Disabled
(1)
Enabled
Allows you to disable or enable the shadowing
request for optional ROM at the
corresponding addresses.
Shadow
D0000h-
D3FFFh Disabled
(1)
Enabled
Allows you to disable or enable the shadowing
request for optional ROM at the
corresponding addresses.
Shadow
D4000h-
D7FFFh Disabled
(1)
Enabled
Allows you to disable or enable the shadowing
request for optional ROM at the
corresponding addresses.
Shadow
D8000h-
DBFFFh Disabled
(1)
Enabled
Allows you to disable or enable the shadowing
request for optional ROM at the
corresponding addresses.
Shadow
DC000h-
DFFFFh Disabled
(1)
Enabled
Allows you to disable or enable the shadowing
request for optional ROM at the
corresponding addresses.
(1) Factory default setting