4866 LX/T  (250-5144)            Cache Memory           Faxback Doc. # 1539

The computer includes 8KB of cache memory. Data that is reused frequently 
during a program is stored in cache memory. Because cache memory is very 
high-speed memory, efficient use of it can dramatically decrease processing
time.

A cache conflict occurs when any system component, either hardware or 
software, attempts to use cache memory for some other purpose. Cache 
conflicts are rare. If a cache conflict occurs, the CACHE486.COM utility 
enables you to diagnose and resolve the conflict.

If you believe that the computer has a cache conflict:

1. Run the CACHE486.COM utility. Note the current cache state.
2. Select the NONE option, and reset the computer.
3. If the problem still exists, the problem was not caused by a cache
   conflict. Run CACHE486.COM again, and select the original cache state.
   Then, reset the computer.

If the problem is resolved by selecting NONE, identify the component 
causing the conflict and the cache memory address involved. The 
documentation for your system options should identify the memory addresses 
they use. Run the cache utility again, and select NOT CACHED for the memory
range that includes the address in conflict. Reset the computer when 
finished.

Running the Cache Utility:

To run CACHE486.COM:

1. Be sure you are in the drive and directory containing the cache utility.
   At the MS-DOS prompt (A> or C>), type:

              cache486

Then press <ENTER>.

2. The program displays a memory map showing the cache state of the 
   predefined memory regions.

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