    Graphics Display Device Driver for OS/2

    Systems Supported: IBM Personal Computer 300 (machine type 6560)
                       that contains the Cirrus Logic 5436/46 graphics
                       chip

    Device Driver Version: 1.13x



    IMPORTANT:

    o  Read this entire document before beginning the device driver
       installation.

    o  This package contains an OS/2 Warp and OS/2 2.1x graphics
       accelerator device driver that supports the Cirrus Logic 
       5436/46 chip set.

    o  This device driver is enabled for the Configuration
       Installation Distribution (CID) method.

    o  This README file is formatted for viewing on your screen.
       With it you can:
       -   Use the Table of Contents to help locate specific topics.
       -   Use the Find option in the Edit menu of the OS/2 System
           Editor to help you locate specific information.
       -   Print the file.

    o  Your use of the enclosed device driver indicates your
       acceptance of the following terms and conditions:
       -   You must be, and you agree that you are, a current licensee
           of OS/2.
       -   You may make copies of the OS/2 device driver equal to the
           number of licensed copies of OS/2 you possess.
       -   All other terms and conditions of your OS/2 license
           agreement apply to this OS/2 device driver; however, this
           does not extend any warranty outlined in such agreement.


    Contents
    ________

           1.0  Supported Features
             1.1 Supported Resolutions
             1.2 Supported Adapters
             1.3 Text Mode Support
             1.4 DDC Monitor Support
             1.5 Selecting Large or Small Fonts for Windows
             1.6 New Functions Provided with This Device Driver
           2.0  Compatibility
           3.0  Preliminary Steps
           4.0  Setting Your Monitor to VGA Mode
             4.1 OS/2 Warp
             4.2 OS/2 2.1x
           5.0  Installing the Display Device Driver from Diskette
           6.0  Running in Unattended Mode
           7.0  Limitations
           8.0  Trademarks

    1.0 Supported Features
    ______________________

     The Cirrus Logic 54X6 device driver provides seamless support
     for accelerated video graphics and advanced color resolutions
     when used with the minimum required video memory.  It conforms
     to the OS/2 32-bit flat memory model and is designed to function
     as a 32-bit Presentation Manager graphics display driver under
     the OS/2 32-bit graphics engine.


     1.1 Supported Resolutions

     This graphics-accelerator device driver supports these
     resolutions and color depths:

                     Number of   Video Memory
      Resolutions    Colors      Required

      640x480           256            1 MB
      800x600           256            1 MB
      1024x768          256            1 MB
      1280x1024         256            2 MB

      640x480        65,536            1 MB
      800x600        65,536            1 MB
      1024x768       65,536            2 MB

      640x480    16,777,216            1 MB



     1.2 Supported Adapters

     For a comprehensive listing of all major manufacturing products
     that are OS/2-compatible, refer to the "OS/2 Hardware
     Compatibility List" book.  Other IBM systems and video adapters
     that contain the Cirrus Logic 5436/46 chip set might be added to
     these lists over time.

     This book is available electronically on the following bulletin
     board systems:

     IBM National Support Center BBS (In the U.S., data connection:
     919-517-0001)
     CompuServe (IBM OS/2 Support Forum \Library\IBMFiles\
                 PCMTABLE.ZIP)
     PRODIGY
     LAN Server & OS/2 BBS - Sydney, Australia
     IBM Austria BBS - Vienna, Austria
     IBM BBS - Vancouver, BC, Canada
     IBM PS BBS - Hong Kong
     IBM OS/2 BBS & IBM AP OS/2 BBS - Singapore
     IBM BBS - Belgium
     IBM BBS - England
     IBM BBS - Spain
     OS2BBS  - Denmark
     Hitline BBS- Switzerland
     DAP & PSP BBS - Italy
     IBM BBS - Jakarta, Indonesia
     IBM BBS - Thailand

    Note: The compatibility hardware test information supplied is
          provided for information purposes.  IBM makes no warranty,
          express or implied, with respect to the operation of OS/2
          on the personal computers listed.


    1.3 Text Mode Support

    The number of characters per line (columns) and number of lines
    (rows) for an OS/2 full screen can be specified with the OS/2
    MODE command.  Supported options for this driver are:

            Columns   Rows
             40        25
             80        40

    Note:  132-column support is not available.


    1.4 DDC Monitor Support

    When the VESA Display Data Channel (DDC) protocols are supported
    in the video BIOS, the operating system, and the monitor, the
    monitor capabilities can be automatically reported to the
    system.  If a DDC monitor is detected, the system will
    automatically start up configured with the best refresh rate
    possible for that monitor.  This information is dependent on what
    data is provided in the chip and the BIOS as to the availability
    of specific refresh rates.  The BIOS provides information on
    refresh rate per resolution, not per mode.


    1.5 Selecting Large or Small Fonts for Windows

    You can select the font size for a WIN/OS2 session in both OS/2
    2.1x and OS/2 Warp 3.0.


    1.6 New Functions Provided with This Driver

    Change Refresh Rate on the Fly is available for OS/2 Warp 3.0
    only.  With this new utility program, located in the Systems
    Settings folder, you can change the vertical refresh rate "on
    the fly," that is, without resetting the operating system or
    restarting the computer.

    Use the following procedure to change the refresh rate for your
    monitor without restarting the computer.

    1.  Double-click on the OS/2 System icon.
    2.  Double-click on the System Setup icon.
    3.  Double-click on the System icon.
    4.  Check to see if the monitor attached to your computer is
        selected in the Monitor Box.
    5.  Click on the Down button of the Refresh box, and select a
        refresh rate (this refresh rate must be supported by your
        monitor).
    6.  Click on the Test button.  The screen will blank momentarily
        and return with a message box.
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