    AST RESEARCH, INC.         TECHNICAL BULLETIN #0856               08-16-93

                          POWER EXEC AND EXTERNAL KEYBOARDS

    PROBLEM:       Some functionality may be lost on older style AST Keyboards
                   when attached to the Power Exec.  The keyboards are
                   manufactured by Compal and NMB.  All models of the Compal
                   keyboard will not function properly with the Power Exec.  The
                   NMB keyboards models are; NMB001A and NMB001D.

    CAUSE:         These keyboards support both XT and AT modes by using an auto-
                   sensing method.  The Power Exec does not support keyboards
                   that use the XT/AT auto-sensing function.

    AFFECTED
    SYSTEMS:       All Power Exec systems.

    SOLUTION:      The Power Exec will not be modified to support those
                   keyboards.  Users wishing to connect an external keyboard
                   should use a different model keyboard.  The current AST
                   Keyboards function properly with the Power Exec.