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3.3.1 Shadow RAM
The system reserves 384 KB of random access memory (RAM) for the shadow
RAM function. This parameter has eight range addresses. When you set these
addresses to Enabled, the system BIOS, video BIOS, and I/O ROM functions run
directly from the shadow RAM for faster operation. When you set them to
Disabled, the functions run normally from ROM.
The address range E0000h - FFFFFh is for shadowing the system BIOS. This item
is always set to Enabled and is not user-configurable.
C0000h - C7FFFh is for shadowing the video BIOS. This item is fixed to Enabled
and is not user-configurable if the Auto Configuration Mode and the Fast Boot
Mode parameters on page 2 of the Basic System Configuration menu are enabled.
Otherwise, you can choose to disable this item.
The remaining address ranges are for I/O ROM functions.
3.3.2 Internal Cache (CPU Cache)
This parameter enables or disables the internal cache memory. This item is fixed
to Enabled and is not user-configurable if you enabled the Auto configuration
Mode and Fast Boot Mode parameters on page 2 of the Basic System
Configuration menu. Otherwise, you can choose to disable this item.
3.3.3 External Cache
This parameter enables or disables the external cache memory. This item is fixed
to Enabled and is not user-configurable if you enabled the Auto Configuration
Mode and Fast Boot Mode parameters on page 2 of the Basic System
Configuration menu. Otherwise, you can choose to disable this item.
AcerAltos 900 User's Guide
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The address range
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