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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
                    (<Ctl>+<Alt>+<Esc>) 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.