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.