      OS/2 DEVICE DRIVER FOR THE CIRRUS LOGIC 5426, 5428,
      5430, and 5434


  This package contains the following:

  o   An OS/2* graphics device driver supporting the 5426,
      5428, 5430, and 5434 chip sets from Cirrus Logic**, Inc.
  o   This README file, which is formatted for viewing
      on your screen.  You can:
      -   Use the Table of Contents to
          help you 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.


  IMPORTANT

  PLEASE READ THE FOLLOWING TERMS AND CONDITIONS.  YOUR
  USE OF THE OS/2 DEVICE DRIVER FOR THE CIRRUS LOGIC
  5426, 5428, 5430, 5434 INDICATES YOUR ACCEPTANCE OF
  THE FOLLOWING TERMS AND CONDITIONS:

  o   YOU MUST BE A LICENSEE OF OS/2.
  o   YOU MAY MAKE COPIES OF THE OS/2 DEVICE DRIVER FOR
      THE CIRRUS LOGIC 5426, 5428, 5430, 5434 EQUAL TO
      THE NUMBER OF LICENSED COPIES OF OS/2 YOU POSSESS.
  o   ALL OTHER TERMS AND CONDITIONS OF YOUR OS/2
      LICENSE AGREEMENT APPLY TO THIS OS/2 DEVICE DRIVER
      FOR THE CIRRUS LOGIC 5426, 5428, 5430, 5434;
      HOWEVER, THIS DOES NOT EXTEND ANY WARRANTY OUTLINED
      IN SUCH AGREEMENT.


  CONTENTS
  ________

           1.0  Supported Features
             1.1  Supported Resolutions
             1.2  Supported Adapters
           2.0  Compatibility
           3.0  Preliminary Steps
           4.0  Installation from Diskette
           5.0  Installation in a CID Environment
           6.0  Functional Restrictions
           7.0  Setting Your Display to VGA Mode
           8.0  APAR Fixes Included in This Driver
           9.0  Trademarks


  1.0  SUPPORTED FEATURES
  _______________________

  The Cirrus Logic 5426, 5428, 5430, 5434 device driver
  provides seamless support for accelerated display 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.  This driver has
  been enabled for use with the IBM* Distributed Console
  Access Facility* (DCAF) product.


  1.1  SUPPORTED RESOLUTIONS

  This video accelerator driver supports
  these resolutions and color depths:

                            Number of    Video Memory
          Resolutions        Colors        Required

            640x480           256             1MB
            800x600           256             1MB
           1024x768           256             2MB
           1280x1024          256             2MB

            640x480         65,536            1MB
            800x600         65,536            1MB
           1024x768         65,536            2MB

            640x480       16,777,216          2MB


  1.2  SUPPORTED ADAPTERS

  IBM has tested display adapters and systems containing the
  Cirrus Logic 5426, 5428, 5430, 5434 chip sets with the specified
  amount of memory.  IBM is continuing to test; therefore, support
  for additional cards might be added over time.

  For a comprehensive listing of all major manufacturing products
  that have been tested by IBM and are OS/2 compatible, refer to the
  "OS/2 Hardware Compatibility List" book.  This book is available
  electronically on the following Bulletin Board Systems:

    IBM National Support Center BBS (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
    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.


  2.0  COMPATIBILITY
  __________________

  This graphics accelerator driver is compatible with
  OS/2 2.1, 2.11, OS/2 for Windows, and OS/2 Warp 3.


  3.0  PRELIMINARY STEPS
  ______________________

  The following steps prepare your computer for the
  Cirrus Logic device driver:

  1.  You must have OS/2 DOS Support installed in order
      to install this driver.
  2.  If you previously installed SVGA support, return
      to VGA resolution using the procedures in
      "Setting Your Display to VGA Mode" later in this
      README before you install this driver.


  4.0  INSTALLATION FROM DISKETTE
  _______________________________

  To install the Cirrus Logic device driver
  from diskette, do the following:

  1.  Insert the Cirrus Logic diskette into drive A (or
      any other diskette drive).
      Note: This diskette should have a volume label of "CIRRUS 1".
      To verify, use "Label A:".
  2.  Open an OS/2 full-screen or OS/2 window session.
  3.  At the OS/2 command prompt, type the following
      command to copy all necessary files to the OS/2
      drive:

        A:SETUP A: C:

      (where A: is the diskette drive, and C: is the
      drive where OS/2 is installed.)

      Then press Enter.
  4.  When prompted to do so, remove the diskette from
      drive A, perform a shutdown, and then restart
      your computer.
  5.  Open the OS/2 System folder.
  6.  Open the System Setup folder.
  7.  Open the Display Driver Install object.
      When the Display Driver Install window appears,
      select Primary Display Driver and then select OK.
  8.  When the Display Driver Select window appears,
      select "Cirrus Logic 5426, 5428, 5430, 5434 (IBM BBS)"
      to install the BBS video driver.
  9.  When the Monitor Configuration/Selection Utility
      window appears, the "Install Using Defaults for
      Monitor Type" choice is preselected.  You can
      accept this choice or select "Install Using
      Display Adapter Utility Program" to choose a
      different refresh rate.  Then select OK.
      If you select the "Install Using Display Adapter
      Utility Program" choice, you must have the DOS
      monitor utility that came with your display
      adapter.  Contact the display adapter
      manufacturer's technical support for information
      on how to use the monitor utility under OS/2.

      NOTE:  At this point, DSPINSTL determines the
             hardware configuration by creating the
             \OS2\SVGADATA.PMI file.  If the
             \OS2\SVGADATA.PMI file has not been
             created, the adapter will not be
             supported.  This process can take
             several seconds and will black-out the screen.

  10. When the Source Directory pop-up window appears,
      insert the Cirrus Logic diskette into drive A.
      Then select Install.
  11. When the installation is complete, do the
      following for all adapters except the 5426.
      For the 5426 step 'e' is skipped.
      a.  Open the OS/2 System folder.
      b.  Open the System Setup folder.
      c.  Open the System object.
      d.  When the Settings notebook appears, select
          the Screen tab.  Then go to Screen page 2.
      e.  On Screen page 2, select your display from
          the display list.  If your display does not
          appear in the list, select Default.
      f.  Return to Screen page 1 and select a screen
          resolution and a screen refresh rate.
      g.  Close the Settings notebook.
      h.  Perform a shutdown and restart your computer.

  Note that during the installation of this driver,
  DISPLAY.LOG and DSPINSTL.LOG files are created in the
  OS2\INSTALL directory.  These files identify the OS/2
  system files that were updated and indicate whether
  the installation was successful.  The contents of
  these files might be useful if you need to report an
  installation problem to IBM.


  5.0  INSTALLATION IN A CID ENVIRONMENT
  ______________________________________

  NOTES:

  1.  The server must contain a directory named
      CIR_DRVS on the same drive where the OS/2
      diskettes reside.  The CIR_DRVS directory must
      contain all of the files from the Cirrus Logic
      device driver diskette.
  2.  OS/2 must have been successfully installed on the
      client using the CID (Configuration Installation
      Distribution) method.

  To install the Cirrus Logic device driver using CID,
  use the following information to modify your LCU
  command file.

  NOTE:  The following information is meant as a guide.
         Your LCU command file might be different.

    /*****************************************************/
    /*           LCU PRODUCT DATA SECTION                */
    /*****************************************************/

                          .
                          .
                          .

    x.cirvideo = 15
    x.15.name='Cirrus Video'
    x.15.statevar = 'CAS_' || x.15.name
    x.15.instprog = 'x:\img\cir_drvs\SETUP.CMD',
                    ' x:\img\cir_drvs ' || bootdrive || ' CID'
    x.15.rspdir   = ''
    x.15.default  = ''

    x.cirdspinstl = 16
    x.16.name='Cirrus CID Dspinstl'
    x.16.statevar = 'CAS_' || x.16.name
    x.16.instprog = bootdrive || '\os2\install\DSPINSTL.EXE',
                    ' /pd:' || bootdrive || '\os2\install\cl54xbb.dsc',
                    ' /s:x:\img\cir_drvs',
                    ' /t:' || bootdrive,
                    ' /res:640x480x256',
                    ' /u'
    x.16.rspdir   = ''
    x.16.default  = ''

    /*---------------------------------------------------*/
    /*         NUMBER OF PROGRAMS SET UP IN THE          */
    /*               PRODUCT DATA SECTION                */
    /*---------------------------------------------------*/

    NUM_INSTALL_PROGS = 16

    /*****************************************************/
    /*                  INSTALLATION SECTION             */
    /*****************************************************/
                          .
                          .
                          .

        when OVERALL_STATE = 2 then do
          if RunInstall(x.cirvideo) == BAD_RC then exit
          Call RebootAndGotoState(3)
        end
        when OVERALL_STATE = 3 then do
          if RunInstall(x.cirdspinstl) == BAD_RC then exit
          Call CheckBoot
        end
                          .
                          .
                          .
    /******************************************************/
    /*                ROUTINE SECTION                     */
    /*  The following information should already exist in */
    /*  the LCU command file.                             */
    /******************************************************/
                         .
                         .
                         .
    RebootAndGotoState:
      parse arg new_state, other

      rc2 = SetState(new_state, 'RebootAndGotoState', 1)    /* Set the state */
                                                            /*  to go to in  */
                                                            /* OVERALL_STATE */

      Call SaveStates                           /* Save the environment vars */

      Call Reboot                               /* Reboot the machine */

      return

                          .
                          .
                          .


    /*****************************************************/
                END OF LCU INFORMATION TO BE ADDED
    /*****************************************************/

  Following is an explanation of the line that is
  executed in the LCU command file:

    C:\OS2\INSTALL\DSPINSTL /pd:c:\os2\install\cl54xbb.dsc
    /S:X:\img\cir_drvs /T:C: /res:640x480x256 /u

      /pd:c:\os2\install\cl54xbb.dsc
       is the dsc laid down during setup phase.

      /S:X:\img\cir_drvs
       where X:\img\cir_drvs is the redirected source path.

      /T:C:
       where C: is the drive where OS/2 is installed.

      /res:640x480x256
       is a resolution/color depth from the list of
       "Supported Resolutions" that appears earlier
       in this README.

      /u
       means Unattended installation.

  NOTES:

  1.  Be sure you have the stated video memory
      required, as listed in "Supported Resolutions"
      earlier in this README.  A safe choice is
      640x480x256.  Any of the listed resolutions can
      be selected, but your display might be damaged if
      you select a resolution that your display does
      not support.
  2.  After the Cirrus device driver has been
      successfully installed on the client machine
      using the CID method and the client machine is
      restarted, the resolution will be as specified by
      command line argument.
  3.  After the CID install, refer the end user to
      4.0 INSTALLATION FROM DISKETTE step 11.


  6.0  FUNCTIONAL RESTRICTIONS
  ____________________________

  o   After Dark** for Windows** images that move from
      left to right do not perform properly at
      640x480x16M resolution.
  o   To avoid a general protection fault while loading
      Ventura Publisher** for Windows, be sure it is in
      one of the 256 color resolutions.
  o   To avoid a trap in Lotus** 1-2-3** for OS/2, do
      not attempt to run the program at 16.7 million
      colors.
  o   WordPerfect** Versions 5.1 and 5.2 for Windows
      produce a general protection fault when the
      "Print Preview" option is selected while using
      800x600x64K or 600x480x16 million color mode.
  o   Users of the software motion video feature of
      MMPM/2* should expect satisfactory results in
      256-color modes.  However, in 64K-color modes,
      OS/2 2.1 users of the feature will experience unusual
      results.  An OS/2 pervasive-fix package is available
      as Fix Package XR06200 for APAR PJ11051. OS/2 versions
      2.11 and above have this fix. The software motion
      video feature is not supported in 16-million
  o   CorelDRAW** 2.0 will not run in a WIN-OS/2*
      window session.  It must be run in a WIN-OS/2
      full-screen session.
  o   Micrografx** Charisma 2.1 will not run in a
      WIN-OS/2 window session.  It must be run in a
      WIN-OS/2 full-screen session.
  o   Distributed Console Access Facility (DCAF) is
      supported in 256-color modes only.
  o   You might have to run the CLMODE utility to
      enable the BIOS to generate high-resolution
      modes.


  7.0  SETTING YOUR DISPLAY TO VGA MODE
  _____________________________________

  Use the following procedures to return to VGA mode.

  o   If you are installing this driver on OS/2 Warp,
      and you do not have a usable OS/2 Desktop, use
      the following procedures to return to VGA mode.
      However, if you have a usable Desktop, it is
      recommended that you use Selective Install to set
      your display to VGA mode.

      1.  Turn on your computer.  If your computer is
          already on, press Ctrl+Alt+Del to restart it.
      2.  When a small white box appears in the upper
          left-hand corner of your screen, press
          Alt+F1.
      3.  When the Recovery Choices screen appears,
          press V.
      4.  Run Selective Install to change the Windows drivers.

      Your display adapter is restored and can work in
      VGA mode.  If you want to install a new display
      adapter or video device driver, refer to Chapter
      16, "Video Procedures," in the User's Guide to
      OS/2 Warp.

  o   If you are installing this driver on OS/2 2.1,
      2.11, or OS/2 for Windows, and you do not have a
      usable OS/2 Desktop, use the following procedures
      to return to VGA mode.  However, if you have a
      usable Desktop, it is recommended that you use
      the Display Driver Install object to set your
      display to VGA mode.

      -   If you installed OS/2 from diskettes, do the
          following:

          1.  Start OS/2 using the OS/2 Installation
              Diskette.  When prompted, insert Diskette
              1 and then press Enter. When the install
              option screen appears, press F3 (or Esc) to
              exit to a command prompt.
          2.  Be sure RSPDSPI.EXE is in the
              \OS2\INSTALL directory.  If it is, go to
              step 3.  If it is not, insert Diskette 8
              into drive A and unpack RSPDSPI.EXE with
              the following command:

                C:\OS2\UNPACK A:\INSTAID C: /N:RSPDSPI.EXE

              (where A: is the drive containing
              Diskette 8, and C: is the drive where
              OS/2 is installed.)
          3.  Type C: and then press Enter.
          4.  Type CD C:\OS2\INSTALL and then press
              Enter.
          5.  Type the following:

                RSPDSPI /PK:VGA /SK:NONE /S:A:\ /T:C:

              (In /T:C:, C: is the drive where OS/2 is
              installed.  In /S:A:, A: is the diskette
              drive you use to install OS/2.)

              Then press Enter.

      -   If you installed OS/2 from CD-ROM or a LAN,
          do the following:

          1.  Start OS/2 using the OS/2 Installation
              Diskette.  When prompted, insert Diskette
              1 and then press Enter. When the install
              option screen appears, press F3 (or Esc) to
              exit to a command prompt.
          2.  Be sure RSPDSPI.EXE is in the
              \OS2\INSTALL directory.  If it is, go to
              step 3.  If it is not, unpack RSPDSPI.EXE
              with the following command:

                C:\OS2\UNPACK E:\DISK_8\INSTAID C: /N:RSPDSPI.EXE

              (where C: is the drive where OS/2 is
              installed, and E: is the CD-ROM or LAN
              drive.)
          3.  Type C: and then press Enter.
          4.  Type CD C:\OS2\INSTALL and then press
              Enter.
          5.  Type the following:

                RSPDSPI /PK:VGA /SK:NONE /S:E:\OS2SE21\ /T:C:

              (In /T:C:, C: is the drive where OS/2 is
              installed.  In /S:E:, E: is the CD-ROM or
              LAN drive.)

              Then press Enter.


  8.0  APAR FIXES INCLUDED IN THIS DRIVER
  _______________________________________

  Some fixed APARs may not be listed. If you received this
  driver through the IBM OS/2 support channel and your requested
  APAR is not listed, please install the driver, as your
  requested APAR is included.

    APAR=PJ16493
    WARP,CM/2 1.11,5250 EMULATOR IN ANY SVGA RES
    UNDERSCORE DISPLAYS OUT OF WINDOW.

    APAR=PJ17644
    GPIFLOODFILL() DOES NOT RETURN WHEN SELECTED PALETTE IS OTHER
    THAN DEFAULT. THIS HAPPENS ONLY USING CIRRUS LOGIC 5422 DRIVER.

    APAR=PJ18212
    DRAG OPEN FOLDERS INSIDE FILE MANAGER (SEAMLESS SESSION),
    AND REMNANTS OF THE BORDERS ARE LEFT INSIDE FILE MANAGER.

    APAR=PJ18892
    TOGGLING BETWEEN WINOS2 FULL SCREEN AND DESKTOP WITH CIRRUS DRIVERS
    SVGA CAUSES CORRUPTION.

    APAR=PJ19154
    CIRRUS LOGIC ACCELERATOR BBS DRIVER CAUSES CORRUPTION IN VIDEO
    DISPLAY WHEN TOGGLING INTO WINDOWS FULLSCREEN SESSIONS.

    APAR=PJ19369
    TRAP000E LOGGING OFF RESTRICTED SHELL WITH WINOS2 SESSION IN
    BACKGROUND. TRAP IS IN VSVGA.SYS CIRRUS 5430 DRIVERS.

    APAR=PJ19408
    RUNNING A PROGRAM CREATED BY GRASP IN FULLSCREEN.  DOS SESSION AND
    SWITCHING TO DESKTOP WILL CORRUPT DOS SESSION.

    ************************
    APARs FIXED DRIVER H.041
    ************************
    APAR=PJ22982
    LOTUS NOTES 4.1 SHOWS FONT CORRUPTION ON CIRRUS VIDEO


  9.0  TRADEMARKS
  _______________

  The following terms, denoted by an asterisk (*) in
  this file, are trademarks or registered trademarks of
  IBM Corporation in the United States and/or other
  countries:

    DCAF
    IBM
    MMPM/2
    OS/2
    Presentation Manager
    WIN-OS/2

  The following terms, denoted by a double asterisk
  (**) in this file, are trademarks or registered
  trademarks of other companies as follows:

  TRADEMARK                OWNER

  After Dark               Berkely Systems, Inc.

  Cirrus Logic             Cirrus Logic, Inc.

  CorelDRAW                Corel Corporation

  Lotus                    Lotus Development
                           Corporation

  Micrografx               Micrografx Incorporated

  Ventura Publisher        Ventura Software, Inc.

  Windows                  Microsoft Corporation

  WordPerfect              WordPerfect Corporation

  1-2-3                    Lotus Development
                           Corporation


  IBM DISCLAIMS ALL WARRANTIES, WHETHER EXPRESS OR
  IMPLIED, INCLUDING WITHOUT LIMITATION, THE IMPLIED
  WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE AND
  MERCHANTABILITY WITH RESPECT TO THE INFORMATION IN
  THIS DOCUMENT.  BY FURNISHING THIS DOCUMENT, IBM
  GRANTS NO LICENSES TO ANY RELATED PATENTS OR
  COPYRIGHTS.
  THIS DRIVER IS COPYRIGHTED BY INTERNATIONAL BUSINESS
  MACHINES CORPORATION.  ALL APPROPRIATE RESTRICTIONS
  APPLY.

                                (End of Document)


