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    AST RESEARCH, INC.         TECHNICAL BULLETIN # 1109               3-24-95

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    	    PREMMIA SE AND 32MB SIMM PROBLEM UNDER WINDOWS NT 3.1 & 3.5

    PROBLEM

    With 2 or more 32MB SIMMs installed in the Premmia SE system, Windows NT 3.1
    and 3.5 aborts to a blue screen with the following messages:

    	Hardware Malfunction
    	NMI: Parity check / Memory Parity Error
    	NMI: EISA IOCHKERR board 6
    	The system has halted
    	Kernel Debugger Using:  Com 2 port 0xeF8, Baud rate 19200

    CAUSE

    SIMM module, part number 104000-204, contains Toshiba DRAM.  The Toshiba SIMM
    part numbers are:

    	THM 368020SG-70
    	THM 364020S-70

    Additional reference number found on actual DRAM chip is a Toshiba DRAM part
    number

    	TC5117400J-70

    PARTS AFFECTED
    AST PART NUMBER AND DESCRIPTION

    501159-005     SIMM Kit 64MB x36 70ns/72pin JEDEC
    520131-005     32MB 70ns PRM SIMM CFG

    SOLUTION

    If your Premmia SE system has been upgraded to 2 or more 32MB SIMMs
    (P/Ns THM 368020SG-70 and THM 364020S-70), and your system is experiencing
    problems with Windows NT 3.1 or Windows NT 3.5, replace the SIMMs with SIMM
    Kit P/N 501159-005.