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                           Release Notes 93000251_F

                      Digi C/X & Xem (PCI & ISA) Systems
                          Asynchronous Device Driver 
                                 Version 1.4.0

                                    AIX 4.X

                        Software Package P/N 75000293_F
                        Software Manual  P/N 92000249_B

                                   03/03/00

CONTENTS
Section  Description
1        Introduction
2        Supported Products
3        Enhancements
4        Bug Fixes
5        Driver Installation
6        History


1. INTRODUCTION

    The Digi AIX C/X & Xem device driver makes the ports on a (C/X) C/CON 
    concentrator or (Xem) PORTS/em module appear as though they are local 
    AIX tty devices directly attached to the computer.

2. SUPPORTED PRODUCTS

    C/X adapter and associated C/CON concentrators.
    Xem adapter and associated PORTS/em modules.

3. ENHANCEMENTS

    Changed format of the release notes.

4. BUG FIXES

    A problem with the driver not releasing a memory address in the Xem
    PORTS/em module initialization has been fixed.  The symptom of this
    error was only seen in AIX 4.3.2, and resulted in a system crash when
    configuring Xem PORTS/em modules or upon boot if the modules were not
    previously configured.

    An incorrect smit description has been corrected.  The symptom of this
    error was smit incorrectly displaying ISA Xem modules as PCI Xem modules.

    A FEP/OS problem has been fixed.  The symptom of this error was seen as
    the fourth "daisy-chained" connected PCI C/X concentrator not being
    recognized upon configuration.

5. DRIVER INSTALLATION

    You should have received a driver package with this file.  
    Assuming you copied this file to your /tmp directory, you can install the
    driver from the command line with:

        installp -ad /tmp/<driver_file_name> all

    You may also install with "smit", using the following procedure:

        Select "Software Installation and Maintenance"

        Select "Install and Update Software"

        Select "Install/Update Selectable Software (Custom Install)"

        Select "Install/Update from All Available Software"

        When smit asks you for the "INPUT device / directory for software",
        enter "/tmp/<driver_file_name>", and hit ENTER.

        Then for "SOFTWARE to install" enter "all" and hit ENTER twice.

6. HISTORY

    Version 1.3.0 - June 24, 1999
        Enhancements
          Added support for Xem adapters (PCI & ISA).

    Version 1.2.0 - August 5, 1998
        Bug Fixes
          Fixed a problem with certain ODM entries not being removed upon
          deinstallation of the driver.

          Corrected a busresolve issue seen on systems with more than one
          PCI bus.

    Version 1.1.0 - March 2, 1997
        Bug Fixes
          Fixed a problem downloading remote-rs232 concentrators.

          Fixed a Multi-processor related system hang.

          Fixed a port hang on PCI C/X ttys.

    Version 1.0.0 - February 2, 1997
        Initial product release.