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.