Xycom AHIP6+ Manual page 31

Chapter 3 – BIOS Setup Menus
Enabling cache increases CPU performance by holding data most re-
cently accessed in a special high-speed static RAM area called cache.
The AHIP6+ provides two levels of cache memory; level one is 16 K
internal to the Pentium processor, and level two, or external cache, is the
cache-on-a-stick site (COAST) which can accommodate 256 or 512 K of
high-speed cache memory.
Option
Memory Cache
Cache System BIOS Area
Cache Video BIOS Area
Cache 0 - 512K
Cache 512K - 640K
Cache Extended Memory Area
Cache Memory Region
Shadow RAM Submenu
Main
Shadow RAM [384 KB]*
Shadow CC00 – CFFF
Shadow D000 - D3FF
Shadow D400 - D7FF
Shadow D800 - DBFF
Shadow DC00 – DFFF
­¯
F1 Help
¨ Select Menu
ESC Exit
This menu allows you to enable or disable these memory segments.
Option
Shadow CC00 - CFFF
Shadow D000 – D3FF
Shadow D400 – D7FF
Shadow D800 - DBFF
Shadow DC00 - DFFF
3-5
Table 3-3. Memory Cache Submenu Options
Description
Controls the state of Pentium II memory cache.
Allows the system BIOS memory area to be cached if enabled. Enabling also
increases system performance. The default is enabled and write protected.
Allows the video BIOS memory area to be cached if enabled. Enabling also
increases system performance. The default is enabled and write protected.
Controls caching of 512K base memory. Default is Write Back Caching.
Controls caching of 512K and 640K base memory. Default is Write Back Caching.
Controls caching of system memory above 1 MB. Default is Write Back Caching.
Caches the corresponding memory when enabled. Memory in this area is
usually extended BIOS or AT-bus memory. Enabling cache may increase
system performance, depending on how the extended BIOS is accessed. The
default is disabled.
Xycom BIOS Setup Utility
[Disabled]
[Disabled]
[Disabled]
[Disabled]
[Disabled]
Select Item -/+
Enter Select » Submenu
Figure 3-4. Shadow RAM Submenu
Table 3-4. Shadow RAM Options
Description
These memory segments are enabled or disabled using this function.
Please note that each segment is 32K and that these segment ranges represent the first
four digits of the linear address range affected. For example, CC00-CFFF represents
the linear address range of CC000-CFFFF.
Item Specific Help
Disabled – This block
is not shadowed.
Enabled – This block is
shadowed.
Change Values F9 Setup Defaults
F10 Save & Exit