4025 LX  (250-5125)               MEMCACHE              Faxback Doc. # 1618

There are no jumpers or switches in order to disable caching.  Using
memcache you can select "NONE" to deallocate memory so that there is
no memory available for caching.  This option is used for resolving
memory conflicts or to release the memory for other uses.  See the
memcache file for more information on its usage.

The computer includes 32KB of cache memory.  Data that is frequently
reused during a program is stored in cache memory.  Because cache memory
is very high-speed memory, efficient use of cache can dramatically
increase 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 in your computer, the
MEMCACHE utility enables you to diagnose and resolve the conflict.

RESOLVING CACHE CONFLICTS

If you believe your system has a cache conflict:

1.  Run the Memcache utility.  Note the current cache state, which is
    highlighted and marked with an asterisk (*).

2.  Select option 12, cache none, and reset the computer.

3.  If the problem still exists after you have selected cache none and
    reset the computer, the problem was not caused by a cache conflict.
    Run Memcache again, select the original cache status, and reset the
    computer again.

4.  If the problem is resolved by selecting Cache none, you must
    identify the component that is causing the conflict and the address
    in cache memory that us involved in the conflict.  The installation
    guide or owner's guide for a system component should identify the
    memory addresses used b that component.  Refer to these documents to
    determine the addresses in conflict.

After you determine the address of the conflict, run Memcache, selecting
the memory range that includes that address.  Reset the computer after
running Memcache.

RUNNING MEMCACHE

To run Memcache:

At the MS-DOS system prompt (A> or C>), type the following command:

    MEMCACHE

Then press ENTER.

The program displays a list of memory address selections.  When you
select one of the options shown, the designated section of memory is
marked as non-cache.

Further instructions and the list of address selections are given within
the utility.

NOTE:  You can copy MEMCACHE.COM to your hard disk.