User`s guide

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Chapter 3 - Using SETUP
Memory Control
The Memory Control subsection lets you view and change DRAM
(system RAM) Timing, enable/disable the L2 (Level 2) External Cache,
and determine which shadowed upper memory regions (in addition to
system and video) are allowed to be cached in a superfast (12-15ns) 256K
or 512K SIMM.
DRAM Timing
Sets the upper limit for DRAM (system RAM) speed to 50, 60, or 70ns
(nanoseconds). DRAM Timing must be set to match the speed of the
slowest SIMM in your memory slots.
Default: 70ns.
External Cache
Allows you to enable/disable the L2 (Level 2) External Cache feature. If
the special Level 2 cache SIMM is present, it offers an ultrafast, 12- to
15-nanosecond buffer between your CPU and regular (50-70ns) system
RAM. Normally L2 cache speeds up your system, but because some
software has problems with L2 caching, you may (rarely) need to disable
the External Cache.
Default: Enabled.
Cache Memory Regions
Allows you to choose which specific shadowed BIOS memory regions (in
addition to System code and Video code) will be cached. Regions are
identified by hexadecimal (base 16) addresses.
Default: All specific regions Disabled.