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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