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    AST RESEARCH, INC.        TECHNICAL BULLETIN # 1345               12-11-95

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    		    Premmia SE Server and Hitachi DRAMs

    PROBLEM

    When 64MB of memory is installed in the Premmia SE computer, the system
    halts with the following  error message, when using SCO ODT 3.0 or SCO
    UNIX 3.2v4.2:

    		    FATAL:  Parity error on the motherboard
    		    PANIC:  Parity error address unknown

    CAUSE

    The 16MB Hitachi SIMMs are incompatible with the TI chipset on the
    system board.

    IDENTIFICATION

    Hitachi's part number HB56D436SB-7 is located on the DRAM of the SIMM.

    SOLUTION

    Use SIMMs that AST has qualified for the Premmia SE Server computer system.
    Revision A of Technical Bulletin #0899 contains a list of qualified SIMMs.

    SUPPLEMENTAL INFORMATION

    1.  The error message described in this Technical Bulletin is specific to
        SCO's ODT and UNIX products.  Other advanced operating systems will
        encounter the same problem and will halt because of a memory parity error,
        but the error message will be unique to that particular operating system.

    2.  AST's Advanced System Diagnostics will always fail the memory
        diagnostic titled "Moving Inversion Test".

    SYSTEMS AFFECTED
    AST PART NUMBER AND DESCRIPTION

    All models   Premmia SE Server Computer system