    AST RESEARCH, INC.      TECHNICAL BULLETIN # 1486             5-9-96

    TITLE: Ascentia 900N/910N Hangs with PC-COMSAB II

    SUMMARY

       The Ascentia 900N/910N hangs with PC-COMSAB II communications
       software.  This issue affects all Ascentia 900N/910N systems.

    ISSUE

       The Ascentia 900N/910N system may hang when executing the
       PC-COMSAB II software package.  This occurs when the program is
       setup to use COM ports.

    BACKGROUND

       The Ascentia 900N/910N system is designed with the VLSI Super
       I/O chipset to control serial communications.  The program code
       of the PC-COMSAB II software does not properly address the VLSI
       implementation, and the Ascentia 900N/910N may hang when the user
       tries to setup the software to use COM ports.

    ACTION

       AST recommends the user find a different software package for this
       type of application.  For further information, call the vendor,
       Lanng & Stelman at +45 86287911.

    NOTES

       The PC-COMBSAB II software is used for computerized control
       of refrigeration compressors.

    TAN 000238CI

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