    AST RESEARCH, INC.        TECHNICAL BULLETIN # 1398           7-12-96

    TITLE: Manhattan P/V Hangs POST 38, WinNT

    SUMMARY

       The Manhattan P and V system may reboot or hang using
       Windows NT 3.51.

       This issue affects all Manhattan P and V servers with the 64MB
       Memory Upgrade kit, AST part number 501619-009, installed.
       These systems include the following: 501500, 501502, 501503, and
       501830.

    ISSUE

       Windows NT 3.51 may reboot itself and hang at POST 38h when the
       Manhattan P or V system has high disk activity.

    BACKGROUND

       Unrecoverable Multi-bit errors occur on IBM 32MB ECC SIMMs with
       Hitachi, LGS, or Goldstar DRAMS (AST SIMM part number 104000-790,
       IBM's identifying part number 11E8480BB-70, AST Field Replaceable
       Unit part number 501615-009A).

    ACTION

       Replace AST Option Kit, part number 501615-009 revision A, with
       AST Option Kit, part number 501615-009, revision B or later or
       the service part equivalent, 104000-790 (2).
       The new kit replaces the 32MB ECC IBM SIMMs part number 11E8480BB-70
       with 32MB ECC IBM SIMMs part number 11E8480BD-70.  Contact AST
       Technical Support at (800) 727-1278 for replacement SIMMs
       (AST P/N 501615-009B or later or the service part equivalent).

       Resellers should ensure that the kit part number is revision B
       or later.

    NOTES

       N/A

    TAN 000539GS, 001332SN

    ---------------------------------------------------------------------
    The information in this data sheet is subject to change without
    notice. AST Research, Inc. shall not be liable for technical or
    editorial errors or omissions contained herein; nor for incidental or
    consequential damages resulting from the furnishing, performance,
    or use of this material. This material contains information protected
    by copyright. No part of this material may be reproduced in any form
    without prior written consent from AST Research, Inc.
    All rights reserved.
    ---------------------------------------------------------------------