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    AST RESEARCH, INC.        TECHNICAL BULLETIN # 1344                12-13-95

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    	    Samsung 1.2 GIG IDE Hard Drives and IDE CD-ROM Drives

    PROBLEM

    When replacing a 1.2 GIG IDE hard drive (HD) with a Samsung brand 1.2 GIG IDE
    HD, the system no longer sees the IDE CD-ROM.  When jumpered as single,
    the drive works fine.

    CAUSE

    Compatibility with the IDE controller on the system board. The IDE controller
    on the Main Logic Board is the determining factor in which jumper setting
    should be used.

    SOLUTION

    The Samsung drive is shipped from AST's warehouse jumpered as a MASTER and a
    spare jumper on the dead connectors.  See diagram below for Factory Defaults.

    	       Factory Default    Adjusted

    		  X X  Jumper     X X
    		  X X             X X
    		  X X             X X
    	 CSEL     X X             X X
    	 DXX      X X             X X
    	 DCF      X X             X X
    	 DSP      X X             X X Jumper
    	 C/D      X X Jumper      X X Jumper

    If, upon installing the Samsung IDE HD, the IDE CD-ROM cannot be seen,
    simply move the spare jumper to the DSP position on the HD. (See diagram
    above for Adjusted).

    SYSTEMS AFFECTED
    AST PART NUMBER AND DESCRIPTION

    501695-XXX      Advantage! 6075P
    501696-XXX      Advantage! 8075P
    501697-XXX      Advantage! 8090P
    501713-XXX      Advantage! 6060P
    501543-XXX      Advantage! 6060P
    501544-XXX      Advantage! 6060P
    501545-XXX      Advantage! 8060P
    501546-XXX      Advantage! 8090P