4833 LX/T  (250-5145)           Cache Memory            Faxback Doc. # 1718

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:

      cache  <ENTER>.

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