	OS/2 Video Device Driver for Chips And Technologies
             65550 Flat Panel/CRT Graphics Accelerator 

1.0 Compatibility
----------------- 
This driver is designed to function with OS/2 Version 2.11 and OS/2 3.0 Warp 
operating systems. 
 
2.0 Hardware 
------------
These drivers support Chips And Technologies 65550 Flat Panel/CRT
graphics accelerator adapters in a PCI Bus configuration.

3.0 Supported Features
----------------------
This graphics accelerator driver is designed to function as a 32-bit
Presentation Manager graphics display driver under the OS/2 32 bit graphics
engine, and provides Seamless Windows 3.1 support.

This display driver also supports setting the CRT screen refresh rate using
the System-Settings notebook in the OS/2 System Setup folder.

3.1 Supported Resolutions
-------------------------
Supported resolutions are provided based on availablity in Video BIOS. Not all
systems have all resolutions provided, and may be display mode ( LCD/Simul/CRT )
dependent.

   8 Bit/Pixel  640x480x256, 800x600x256, 1024x768x256
  16 Bit/Pixel  640x480x64K, 800x600x64K, 1024x768x64K
  24 Bit/Pixel  640x480x16M

4.0 Driver Installation 
-----------------------

4.1 Preliminary Steps
---------------------
The following steps must be performed before you install the 65550/554
display driver:
  
  1. OS/2 DOS Support must be installed. 

  2. If you previously installed SVGA support, you must reset the system
     to VGA mode. VGA is the default video mode enabled when OS/2 is installed.
     To restore VGA mode, use Selective Install and select VGA for Primary
     Display. For more information on this procedure, see the section on
     Changing Display Adapter Support in the OS/2 Users Guide.

4.2 Installing from Diskette
----------------------------
To install this driver, do the following steps:
 
  1. Open an OS/2 full screen or windowed session. 

  2. Place the 65550 PCI Display Driver Diskette in drive A.

  3. At the OS/2 command prompt, type the following commands to 
     copy the files to the OS/2 drive:
     
       Type A: <ENTER> to make this the default drive.

       Type SETUP A: C: <ENTER>

          where A: is the floppy disk drive and       
                C: is the hard disk partition containing \OS2	
		      
     When the Setup Program is completed, you will need to perform a shutdown
     and then restart the system in order for changes to take effect.
	        
     A log of the information output during the install can be found
     in <root>:\OS2\INSTALL\DISPLAY.LOG
 
  4. After restarting the system, perform the following steps:
        		
       1. Open the OS/2 System folder.
     
       2. Open the System Setup folder.
	  
       3. Open the Display Driver Install Object
	  
 	  This step will execute the Display Driver Installation ( DSPINSTL )
	  utility program to finish installation of the new drivers.
 
       4. When the Display Driver Install window appears, select Primary Display
          and then select OK.
	
       5. When The Primary Display Driver List window appears, select	
  	  "Chips and Technologies 65550/554" from the list of adapter
	  types, then select OK to install the video driver.

       6. When the installation is complete, you will need to shutdown and then
	  restart the system for the changes to take effect. Make sure to remove
	  the install diskette before restarting the system.

When the system has restarted, the display driver will be initialized for
640x480x256 Color, 60Hz refresh. To switch to a different video resolution
color depth, or refresh rate, follow the steps below.

4.3 Selecting Monitor Type
--------------------------------------------
Monitor type is initially set to DEFAULT. This DEFAULT setting may not allow 
you to select all resolution/refresh combinations that are available for your
monitor. The following steps can be done to select monitor type. This section
applies only after installation, or when a different monitor is used.

  1. Open the OS/2 System folder. 
       
  2. Open the System Setup folder.
      
  3. Open the System object.
     
  4. When the System - Settings notebook appears, select the Screen tab. 
     This will take you to page 2 of the settings.
	  
  5. On Screen page 2, select your monitor type from the Display Name
     list. If your monitor is not listed, select DEFAULT. Return to
     Screen page 1.

  It may be necessary to restart your system to have all refresh rate
  options available.
	  
4.4 Selecting Screen Resolution/Refresh Rate
--------------------------------------------
To switch to a different video resolution, color depth or refresh rate,
follow the steps below.

   1. Open the OS/2 System folder. 
       
   2. Open the System Setup folder.
      
   3. Open the System object.
       
   4. From the selection windows provided, select a new Screen Resolution
      and Screen refresh rate.

      Please note, Refresh rates, other than 60Hz, are only valid when
      the display is switched to CRT only display mode.
	  
   5. Close the System-Settings notebook.
       	
   6. Perform a shutdown and restart for the changes to take effect. 
	

4.4 Installation Notes 
----------------------
  1. During the installation of this driver, DISPLAY.LOG and DSPINSTL.LOG files 
     are created in \OS2\INSTALL directory. These files identify the OS/2 system
     files that were updated and indicate whether the install was successful.
     The DISPLAY.LOG file also contains a string which identifies the version of
     driver that was installed. This information may be important when reporting
     an installation problem.

  2. During installation, DSPINSTL will invoke the SVGA Configuration program
     SVGA.EXE to determine the hardware configuration, and create the file 
     \OS2\INSTALL\SVGADATA.PMI. If this file is not created, the adapter will
     not be supported. When this step is done, the display will be blanked, and
     you may see a series of flashes on the display, and what appears to be a
     "corrupted" display. This is normal, as the configuration process is doing
     Video BIOS mode sets to determine which screen resolutions BIOS supports.
     This configuration information is then used to provide the System-Settings
     Resolution and Refresh selections.

5.0 WIN-OS/2 Sessions 
---------------------
Please note the following limitations regarding WIN-OS/2. 

  1. It is recommended that the user start all WIN-OS/2 sessions via one of the
     WIN-OS/2 icons in the Command Prompts folder.

  2. The WIN-OS/2 session settings for both WIN-OS/2 Full Screen and WIN-OS/2
     Window should be set to Enhanced Capability. The default setting is
     Standard Mode. If this setting is not changed, Windows will not run
     correctly. To make this change, do the following:
     
     1. Open the OS/2 System Folder.
     2. Open Command Prompts Folder.
     3. Place the mouse pointer over WIN-OS/2 Full Screen ( or WIN-OS/2 Window )
	icon and press mouse button 2 ( right button) to bring up the menu.
     4. Select Settings.	
     5. Place the mouse pointer over the Session tab, and select by pressing
	mouse button 1 ( left button ).
     6. Place mouse pointer over Win-OS/2 Settings, and select by pressing	
	mouse button 1 ( left button ).
     7. From the Win-OS/2 Settings - Categories, select All DOS and WIN-OS/2
        Settings and then select OK.
     8. From the list of settings that appear, make sure that	
        WIN_RUN_MODE is set to Enhanced Capability, and then "Save" these
        settings.
 
  3. Do not start WIN-OS/2 in a DOS or OS/2 Window.  The system does 
     not support the enhanced video mode being used in a window, and 
     therefore will not run. 
 
  4. When running a full screen WIN-OS/2 session, do not use ALT-HOME to
     switch to Windowed DOS session.
 
  5. The Windows SYSTEM.INI file may need to be modified to select the 
     correct mouse driver for use on the target system. The default is
     MOUSE.DRV=MOUSE.DRV. Some manufacturers may use a different mouse driver
     than the default, and the driver may reside in a directory other than
     the Windows root directory. In SYSTEM.INI, you will find two statements
     that specify the filename of the current mouse driver, MOUSE.DRV=  and 
     OS2MOUSE.DRV=  . Make sure that OS2MOUSE.DRV=  specifies the same mouse
     driver and path as MOUSE.DRV= .
	
     Example:   MOUSE.DRV=LMOUSE.DRV     ; installed by Windows
	      	OS2MOUSE.DRV=LMOUSE.DRV     ; installed by OS/2 Install
		
     If OS2MOUSE.DRV does not point to the correct mouse driver, then
     WIN-OS/2 Full Screen and WIN-OS/2 Window sessions will not run. 	
	
	
6.0 Installation Diskette Copy 
------------------------------
For proper installation of OS/2 drivers, all diskette copies must be properly
labeled "CTDISP 1". 
 
To copy the OS/2 Display Driver Diskette, do the following steps:
 
   1. Copy all files on the OS/2 Display Driver Diskette as you normally would
      onto another diskette. 
 
   2. Place the diskette copy in drive A.  At the C:\ prompt,
      type LABEL A: CTDISP 1 to properly label your diskette.  Then store 
      your diskette copy in a safe place. 
 
7.0 Installation on Merlin ( OS/2 4.0 )
---------------------------------------
If you are installing these drivers on Merlin and you receive the following
error message:

 "This fixpack is intended for OS/2 versions 4.00,3.01,3.00,2.11,2.10 only !"
 
the install script has not correctly identified the Merlin version id. This
will require editing SETUP.CMD on this disk to function correctly.

Find the following source lines in SETUP.CMD:

   IF ERRORLEVEL 210 set dsc=%src%\prereqs.dsc&& set cfg=%src%\vcfginst.exe&& GOTO VER_WARP
   GOTO VER_NOT_OK
   :VER_MERLIN
   copy %src%\chipm*.dsc %trg%\os2\install\chips*.dsc >NUL

Change these lines as follows:

   IF ERRORLEVEL 210 set dsc=%src%\prereqs.dsc&& set cfg=%src%\vcfginst.exe&& GOTO VER_WARP
   set dsc=%src%\prereqs.dsc
   :VER_MERLIN
   copy %src%\chipm*.dsc %trg%\os2\install\chips*.dsc >NUL

The install will now default to Merlin, and the drivers will get installed
correctly. Reference section 4.2 above and start install again. 


