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AST RESEARCH, INC.           TECHNICAL BULLETIN # 1016                11-16-94

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               BRAVO LC 4/50S AND 0S/2 1.3 MOUSE AND FLOPPY ISSUE


PROBLEM:        Under OS/2 version 1.3, the Bravo LC 4/50s system locks up
                when the mouse is moved, during floppy access, when no floppy
                is present.

CAUSE:          OS/2 version 1.3 video drivers are not supported by Cirrus
                Logic chipset.

SYSTEMS
AFFECTED:           AST
                PART NUMBER      DESCRIPTION

                501433-G08      BRAVO LC 4/50S

SOLUTION:       Upgrade the operating system to OS/2, version 2.1, which
                supports Cirrus GD5428 video drivers, or use an external video
                adapter that is compatible with the standard Microsoft VGA
                driver.