    AST RESEARCH, INC            TECHNICAL BULLETIN # 0922            4-20-94

               POWEREXEC CURSOR FREEZES WITH THUMBELINA PS/2 TRACKBALL

    PROBLEM:        After using the THUMBELINA PS/2 trackball from APT INC.
                   (APPOINT ) with the PowerExec for approximately five minutes,
                   the cursor freezes.

    CAUSE:         THUMBELINA PS/2 trackball firmware is incompatible with the
                   PowerExec mouse port.

    SYSTEMS
    AFFECTED:       All PowerExecs.

    SOLUTION:       Call APT INC. (APPOINT ) technical support at 800-448-1184 and
                    request an updated trackball with the correct firmware
                    (date code of 9425 or later).