    AST RESEARCH, INC.         TECHNICAL BULLETIN #0849               08-02-93

                       POWER EXEC WITH VARIOUS MEMORY MAPPINGS

    PROBLEM:       The Power Exec will not display a consistent upper memory
                   mapping with expanded memory managers while using PCMCIA
                   drivers.

    CAUSE:         The Power Exec PCMCIA driver uses several 16KB memory windows
                   within the D000h-DFFFh range.  This will result in various
                   memory mappings each time the system is powered on and the
                   memory locations are checked.

    SYSTEMS
    AFFECTED:      All Power Exec systems.

    SOLUTION:      Exclude the D000h-DFFFh memory range on the Expanded Memory
                   Manager device statement command line.  This will provide the
                   system with a stable memory range and memory mappings will now
                   be consistent.

    CAUTION:  In no case will AST Research, Inc. be liable for damage to the
              system or loss of data caused by improper or faulty installation of
              this file.