    AST RESEARCH, INC.         TECHNICAL BULLETIN #0802                 01-04-93

                      POWER EXEC MODEM SOFTWARE AND EMM386.EXE

    PROBLEM:       Communication software used for modems may experience problems
                   on the Power Exec if EMM386.EXE is used along with the Card
                   Configuration Utility (CCU.EXE) program, part number
                   910717-031 release 1.0.  This currently occurs with all
                   versions  of EMM386.

    CAUSE:         Both the EMM386 program and the CCU program load into memory
                   at the same D000h memory location.  CCU.EXE takes two 16KB
                   memory windows; one at DC00h for PCMCIA common memory and one
                   at D800h for attribute memory.  Also CCU will establish a
                   memory window at D000-D400h for network adapters which is
                   documented in the Power Exec User's Guide, part number
                   001492-001.

    SYSTEMS
    AFFECTED:      All Power Exec systems.

    SOLUTION:      Exclude the D000h-DFFFh memory range in EMM386.  This will
                   prevent EMM386.EXE from using this memory range and allow the
                   CCU program to use the memory range.

                   For example;

                   DEVICE=C:\EMM386.EXE X=D000-DFFF

                   For more information on EMM386 and the exclude switch, please
                   consult your MS-DOS manual.  Make sure the appropriate files
                   are backed up before modifying this statement.

    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.