
      INSTALLATION GUIDE FOR OS/2 2.1X 256 COLOR ACCELERATION DRIVERS
                   FOR CIRRUS LOGIC'S GD543X CHIPS
--------------------------------------------------------------------------

Programs you need for Installation.
-----------------------------------
Clmode.exe or Video Adapter Utility program to select monitor type.

IMPORTANT NOTE:
-----------------
IBM's DISPINST.EXE calls SVGA.EXE to identify the SVGA chipset before proceeding 
with the installation of a display driver. The IBM SVGA.EXE shipped with 
OS/2 2.1 does not correctly ID the Cirrus Logic Chipset. Running CLINST21.CMD 
will update SVGA.EXE with the new Cirrus SVGA.EXE before calling DSPINSTL.EXE. 
This will help OS/2 identify the Cirrus Logic Chipset correctly.

If you are having trouble installing the Cirrus Logic Drivers, manually 
rename the IBM SVGA.EXE TO SVGA.IBM and copy the new SVGA.EXE file 
to your OS/2 subdirectory. Information about SVGA.EXE can be found in
the OS/2 Users Manual on Page 339.  

During installation, the target file may have a newer date than the
source file, select the 'Yes' button when the installation program display
a dialog box to notify the user of this situation.

Install from floppy diskette:
-----------------------------
1. Insert OS/2 display driver disk (must have volume labeled "DISP 1") 
   into a floppy drive.

2. Invoke an OS/2 window session or an OS/2 full screen session.

3. Change to the floppy drive with the display driver disk, e.g. a:.

4. Run clinst21.cmd from the floppy drive, e.g. clinst21 c.

5. Check the 'Primary Display' check box from the DISPLAY DRIVER INSTALL
   dialog box.

6. Select "Cirrus Logic 543x Acceleration Drivers" from the PRIMARY DISPLAY ADAPTER TYPE
   dialog box.

7. The MONITOR CONFIGURATION/SELECTION UTILITY dialog box will appear. 
   Click OK for default monitor settings (which is monitor type 3) or 
   select Display Adapter Utility Program and run your display adapter
   utility program to set your monitor type. 
   For example: 
               c:\vgautil\clmode.exe t640=60 t800=60 t1024=60 t1280=87 
   Clmode.exe comes in your Cirrus Logic Utilities Disk.

8. Select the display resolution of choice from the SELECT DISPLAY RESOLUTION
   list box.

9. Click the 'Install' button in the SOURCE DIRECTORY dialog box and follow
   prompts.

Install from the hard drive:
----------------------------
1. Xcopy display driver disk one to the hard drive, target directory
   must be named DISP_1, e.g. xcopy a: c:\disp_1.

2. Invoke an OS/2 window session or an OS/2 full screen session.

3. Change to \disp_1 directory, run clinst21.cmd, e.g. clinst21 c.

4. Check the 'Primary Display' check box from the DISPLAY DRIVER INSTALL
   dialog box.

5. Select "Cirrus Logic 543x Acceleration Drivers" from PRIMARY DISPLAY ADAPTER TYPE
   dialog box.

6. The MONITOR CONFIGURATION/SELECTION UTILITY dialog box will appear. 
   Click OK for default monitor settings (which is monitor type 3) or 
   select Display Adapter Utility Program and run your display adapter
   utility program to set your monitor type. 
   For example: 
               c:\vgautil\clmode.exe t640=60 t800=60 t1024=60 t1280=87 
   Clmode.exe comes in your Cirrus Logic Utilities Disk.

7. Select the display resolution of choice from the SELECT DISPLAY RESOLUTION
   list box.

8. Click the 'Change' button in the SOURCE DIRECTORY dialog box, type
   c:\disp_1 in edit box and follow prompts.



Special Case when running OS/2 2.1 for Windows
______________________________________________

If you are running OS/2 2.1 for Windows and have installed the Cirrus
Logic OS/2 drivers and you wish to switch between the OS/2 operating system 
and DOS operating system, the following changes must be made to the SYSTEM.INI
file to run Windows 3.1 under each of the different operating systems.


Running Windows 3.1 under DOS operating system.

1. Dual Boot to DOS.
2. While in DOS before running Windows, open \Windows\System.ini and comment 
   out the line OS2VERS=21 under the [clvga] session.

FROM:

[clvga]
OS2vers=21

To:

[clvga]
;OS2vers=21

Returning to OS/2 operating system and running Windows 3.1.

1. While in DOS, open \Windows\System.ini and take out the ";" in
   front of OS2VERS=21 in [clvga] session.  

FROM:

[clvga]
;OS2vers=21

To:

[clvga]
OS2vers=21
