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    AST RESEARCH, INC.         TECHNICAL BULLETIN # 1479                3-26-96

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    	Ascentia 900N/910N, ProStation, and Sanyo Torisan 4X IDE CD-ROM

    PROBLEM DESCRIPTION

    Ascentia 900N/910N computers, with BIOS versions prior to 3.0, may be
    unable to access Sanyo Torisan 4X CD-ROM, with the default ProStation's
    memory address.

    SOLUTION

    When the Ascentia 900N/910N computer docks with a ProStation (docking station)
    which has a Sanyo Torisan CD-ROM installed, the docking station memory address
    D0000H needs to be changed to C8000H.  To do so, change all switch settings
    on SW1 to the ON position as follows:
    1-ON, 2-ON, 3-ON, and 4-ON.  The setting for SW2 remains the same.

    If the Ascentia 910N computer has BIOS version 3.0 (p/n 905580-031) or
    higher installed, the above procedure is not required.  However, if the Sanyo
    Torisan CD-ROM is the only IDE device in the docking station, the CD-ROM needs
    to be set as a Secondary Master, when the CD-ROM driver is installed and the
    CD-ROM jumper is selected.

    SYSTEMS AFFECTED
    AST Part Number And Description

    501589-XXX    All Models
    501590-XXX    All Models
    501592-XXX    All Models
    501299-XXX    4/50 Color 10
    501300-XXX    4/50 ColorPlus 9
    501302-XXX    4/75 Color 10
    501304-XXX    4/75 ColorPlus 10