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    AST RESEARCH, INC.           TECHNICAL BULLETIN # 1018                11-16-94

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              ADVANTAGE! PLUS AND BRAVO MS USING CHINON FR506 5.25" DRIVE

    PROBLEM:        The Advantage! Plus and Bravo MS systems experience a boot
                    error when using a Chinon FR506, 1.2M floppy drive.

    CAUSE:          A 150 Ohm pullup on some signal lines causes a boot error on
                    the Advantage! Plus system.

    SYSTEMS
    AFFECTED:       Chinon floppy drives and AT-class systems.

    SOLUTION:       Older 5.25" drives using 150 Ohm pullups do not function
                    correctly in AT-class computers.  AST recommends using an
                    alternate drive.