4820SX/T (250-5140) Cache Memory Faxback Doc. # 1677 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. Further instructions are displayed within the utility's help system.