



        
        
        Dear SCO Customer:
        
        Enclosed you will find a support level fix (xnx094) which allows 
        the Tecmar Microchannel Host Adaptor (tape controller) to work with 
        Tecmar QT series tape drives (60E,90E, or 125E) on an IBM PS/2 Model
        80 running SCO XENIX 386 Operating System for the PS/2 Release 2.2.2
        or 2.2.3.

        Remember that you must update the PS2's configuration information
        before it will allow you to run Xenix with the Tecmar Microchannel
        card installed. 

        Be aware that only interrupts 3,4,5 and 6, are available to you in
        the IBM configuration setup. Interrupt 3 is used by Com 2, inter-
        rupt 4 is used by com 1, interrupe 5 is used by lp2 and interrupt 6
        is used by the primary floppy drive. You may need to disable one of
        these devices in order to use your tape drive if you do not have a
        free interrupt.


        Updating the PS/2 Configuration
        ===============================

        Boot up your system with the IBM Reference Diskette.
        
        Choose the "Backup the Reference Diskette" option (#2) and follow the
        instructions for making a backup copy of your Reference Diskette.

        Boot up your system with your backup Reference Diskette.

        Choose the "Copy an Option Diskette" option (#5) and follow the  
        instructions for copying your Tecmar Quality Tape Operating Software
        Diskette.
                                                                            
        Power off your system.

        Put the Tecmar Microchannel Host Adaptor in your machine.

        Boot up your system with your backup Reference Diskette.

        You will get the message:

            Adaptor Configuration Error 00165
            If you have installed or removed an adaptor, run automatic
            configuration.
            Automatically configure the system? (y/n) 

        Choose "y" for yes, and follow the instructions.



        Now, you can boot up with your backup Reference Disk to confirm your
        configuration, or simply boot from the hard disk and get a Xenix boot
        prompt.


        Xenix Tape Driver Install
        =========================

        To install the Xenix fix (xnx094), log in as root and insert the

        floppy into your floppy drive and type:

            /etc/install

        The device driver will be extracted and the Xenix "mkdev tape" program  



        will be executed for you. 

        Type "1" at the menu to choose the "install cartridge tape" option. 

        Next, you have the choice of displaying current tape parameters,
        modifying current tape parameters, or taking the default parameters.
        Just type "q" for quit. You will see the message:

            Updating system configuration.
            Installing tape driver.

        Picking "q", or selecting default parameters, allows the tape driver to
        automatically use the Tecmar controller's parameters based on how they
        were defined when you updated the PS/2's configuration information.
        
        Choose "q" for quit at the final menu.  You will see the message:
        
            "You must create a new kernel to effect the driver change you
            specified.  Do you wish to create a new kernel now?  (y/n)"
        
        Choose "y" and you will see the message:                  

            Re-linking the kernel...

        This will take a moment and then you will be asked:

            Do you want this kernel to boot by default?

        Choose "y" again.



        Your original kernel has been renamed "xenix.old". If you ever need to
        boot your original kernel, after a system crash for example, just type
        "xenix.old" at the "boot:" prompt.
        
        If necessary, refer to the Runtime Environment Manual, Chapter 7, on
        "Using Peripheral Devices", for more details concerning installation
        of tape drives.


        If you have any questions, please call our Customer Services
        Department at (800) 626-4381. SCO Customer Service is available Monday
        through Friday, 6:00 A.M. to 5:00 P.M., Pacific Standard Time.

        We appreciate your business.

        
        
        Softcare Support Services
        
        JM:emw/11-88
        xnx.094:rev.2

