    AST RESEARCH, INC.         TECHNICAL BULLETIN #0926                    05-26-94

                           BRAVO LC OVERDRIVE PROCESSOR UPGRADE

    PROBLEM:        Non-SL-enhanced processors will not work in the Bravo LC
                    systems.

    CAUSE:          The system board was designed to support only SL-enhanced
                    processors.

    SYSTEMS
    AFFECTED:           AST                               REVISION
                    PART NUMBER       DESCRIPTION           LEVEL

                    501377-XXX      BLC4-25 S/3 4MB 115V     All
                    501379-XXX      BLC4-33/3 4MB 115V       All
                    501380-XXX      BLC4-66D/3 4MB 115V      All
                    501381-XXX      BLC4 100T/3 4MB 115V     All

    SOLUTION:       The processor upgrade works only with the Intel OverDrive
                    processors that have an identification number of SZ873 or
                    above.  This number is on the top of the heat sink.