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    AST RESEARCH, INC.         TECHNICAL BULLETIN # 0937                  5-12-94

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                BRAVO LC2 AND CABLETRON LOCKING UP, AND FLOPPY PROBLEM

    PROBLEM:        Bravo LC2 system intermittently locks up while in Windows, with
                    Banyan Vines, and generates the following message at boot:

                        12.03   Floppy adapter or controller failure
                        or
                        11.13   Floppy drive type mismatch, please run system setup
                        (++) to correct the problem

    CAUSE:          The super I/O controller (SMC 37C651) on the Bravo LC2 system
                    board fails to initialize.

    SYSTEMS
    AFFECTED:       All models of Bravo LC2 systems, with a Cabletron Ethernet
                    10Base-T board installed.

                        AST                                            REVISION
                    PART NUMBER            DESCRIPTION                   LEVEL
                    501196-XXX      B4-25S/3 2 MB LC2 115V                All
                    501233-XXX      B4-33S/3 2 MB LC2 115V                All
                    501197-XXX      B4-33S/123W 4 MB LC2 115V             All
                    501198-XXX      B4-50D/3 2 MB LC2 115V                All
                    501199-XXX      B4-66D/3 2 MB LC2 115V                All

    SOLUTION:       Upgrade the Bravo LC2 system board with rev. #13 or higher
                    (see FCN 0121).  It is also recommended to upgrade the
                    Cabletron Ethernet board to rev. #5 or higher.

    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 system board.