README                       MATROX GRAPHICS INC.           January 16, 1997

                 Millennium/Mystique MGA PowerDesk for Windows 95
                             Revision 3.22.059


Table of Contents
-----------------

- Description of This Release
- Floppy Contents
- Installation
- Registry Settings
- Notes, Problems, and Limitations
- MGA Diagnostic program
- IRQSET.EXE program

Note to users of localized versions: This file may contain some last
minute information not translated into your language. We apologize for 
the inconvenience.

Description of This Release
---------------------------

This is the MGA PowerDesk software version 3.22, for Windows 95.

This product includes a Windows 95 display driver AND the Matrox
PowerDesk for Windows 95, which allows: virtual desktop, hardware 
pan and zoom, DirectDraw/Direct3D driver and more...

Floppy contents
---------------

   Basic Driver files (installed in \Windows\System):

   MGAPDX64.INF   Installation support file
   MGAPDX64.DRV   MGA Win95 Driver
   MGAPDX64.VXD   MGA miniVDD
   MGALLX64.DLL   MGA initialization dll
   MGAXDD.DRV     MGA DirectDraw 32-bit driver
   MGAXDD32.DLL   MGA 32-bit DirectDraw/Direct3D component
   MGAXDD.VXD     MGA VxD DirectDraw component

   PowerDesk files installed in \Windows\System:

   MGASHEET.DLL   MGA Display Property Sheet (replaces regular sheet)
   M_SHEET.DLL    Text strings for MGASHEET.DLL
   MGASHEET.HLP   Help file for Property Sheet
   MGAMON.DLL	  MGA Monitor Selection Property Sheet
   M_MON.DLL	  Text strings for MGAMON.DLL 
   MGAMON.HLP	  Help file for MGA Monitor Selection
   MGACTRL.EXE    MGA Control Center  (for PowerDesk)
   MGACTRL.DLL    MGA Keyboard hooker (for PowerDesk hotkeys)
   M_CTRL.DLL     Text strings for MGACTRL.EXE
   MGAPREV.BMP    MGA Pixel Depth Preview Bitmaps 
   MGABKGND.BMP	  MGA Background bitmap for property sheets
   SXCIX64.DLL    Matrox 3D library

   PowerDesk files installed in \Program Files\Matrox MGA PowerDesk:

   README         This file
   ONLINE.DOC     Documentation
   \Mon
   MGA.MON        MGA Monitor File
   MGA.BIN        Compressed MGA.MON monitor File
   \DNav
   MGADNAV.EXE    MGA Win95 Desktop Navigator program
   M_DNAV.DLL	  Text strings for MGADNAV.EXE   
   \QDesk
   MGAQDESK.EXE   MGA Win95 QuickDesk program   
   M_QDESK.DLL    Text strings for MGAQDESK.EXE
   \Color
   HGCCTL95.EXE   MGA Color resident program
   HGCCPL.DLL	  MGA Color Property Sheet page
   HGCCPL.HLP	  Help file for MGA Color Property Sheet

Installation
------------

The installation is covered in the "online.doc" file. 
You can view this file with WordPad.

The installation process can be customized by modifying the "mga.ini"
file on the diskette. Examples of customization options include:
default installation path, default driver performance switches,
default schemes, etc. The file is self-documented. This type of 
customization should be carried out by advanced users only.

Registry Settings
-----------------

PowerDesk settings are kept in the Windows 95 registry, under the keys:

HKEY_LOCAL_MACHINE\SOFTWARE\MATROX\POWERDESK 
HKEY_LOCAL_MACHINE\SOFTWARE\MATROX\DESKNAV
HKEY_LOCAL_MACHINE\SOFTWARE\MATROX\COLOR CONTROL

Notes, Problems, and Limitations
--------------------------------

- DirectDraw, Direct3D and DirectVideo support

  The DirectDraw driver we provide is compatible with DirectX 2 and includes 
  Direct3D support. For our DirectDraw/Direct3D driver to be called, and benefit 
  from hardware accelerations, Microsoft DirectX 2 MUST be installed, even 
  for applications originally made for DirectX 1.

  For your convenience we have placed a copy of the Microsoft DirectX 2 
  redistributable code on our Web site. If you are getting this driver from a
  Matrox CD-ROM, you will also find a copy of DirectX 2 on the CD.

  If you have a Millennium card, the DirectX 2 setup will detect it and print 
  the following messages:
    
    "Setup has detected display drivers that have not been tested with
    DirectX. To get the best game performance, Setup can replace your existing
    drivers."

    "Replace existing display drivers with DirectX drivers?"

  Answer "No" to the question. Otherwise, DirectX 2 would install its
  Millennium display driver which is not as optimized and does not
  support PowerDesk. 

  Note that the Microsoft DirectX 2 code does not include DirectVideo-enabled
  codecs. Hence for faster playback of Indeo and Cinepak AVI files, you should
  install the Microsoft DirectVideo redistributable files. This package is 
  available on our Web site and on our latest CD-ROM.

- Bus Mastering support under Matrox Mystique

  The Matrox Mystique supports bus mastering, which can accelerate 3D frame 
  rate and video playback in Windows 95. A switch is available in the MGA 
  Advanced Settings sheet to enable/disable bus mastering.

  Please take note of the following regarding bus mastering in this version:

  - bus mastering support is not yet implemented for video playback, hence 
  performance will be the same whether the switch is on or off. 

  - bus mastering support is however implemented in Direct3D and upcoming 
  Mystique bundled games.

  - some early PCI systems do not properly assign an interrupt to graphics
  boards such as the Mystique. Bus mastering requires an interrupt, so 
  failure to get an interrupt will result in 3D applications not using 
  this performance feature.

- PowerDesk MGA Settings property sheet page vs the Microsoft Settings page

  When selecting a vertical or horizontal desktop with the MGA Settings
  page, the Microsoft Settings page is not updated with the new desktop.
  Closing and reopening the Display Properties will refresh the Settings
  page.
 
  When selecting a new monitor in the MGA Monitor page, the Microsoft
  Settings page is not updated with the resolutions that match the monitor.  
  Closing and reopening the Display Properties will refresh the available
  resolutions in the Settings page.

  Using the Microsoft Settings page to change from a horizontal or vertical
  desktop to a non-virtual desktop mode, may result in a different desktop than
  the expected one. Rebooting the system will fix the problem.

- Media XL drivers compatibility

  This version of MGA PowerDesk is not compatible with the Media XL drivers
  1.03 and earlier.  If you want to use the MediaXL drivers and utilities,
  you will need to install at least version 1.10 of the Media XL drivers.
  The latest drivers are available on our Web site.

- Adobe Type Manager limitation

  When Adobe Type Manager is installed, you cannot run the driver if
  the "Advanced Graphics Acceleration Settings" is set to none. Note
  that ATM is installed as part of Adobe Acrobat Reader. This is an
  Adobe problem documented in the Windows 95 "display.txt" file.

- Monitors in interlaced mode

  Some old monitors such as the IBM 8514 and the NEC 3D do not support
  non-interlaced mode in all resolutions. The MGA driver does not
  properly handle interlaced mode under the Windows 95 monitor
  mechanism, so if you own one of these monitors, please use the MGA
  Monitor Program.

- DirectDraw and Automatic Power Management

  As stated in "Microsoft DirectX release Notes" dated September 30,
  1995, A DirectDraw game might be unable to restore properly if it
  is suspended by Automatic Power Management utilities.

- VESA modes:

  Your MGA Video BIOS supports DOS VESA SuperVGA applications and
  games in the following modes:

      Graphics Modes
  Mode   Resolution  Colors            
  
  100h   640x400     256        
  101h   640x480     256 
  110h   640x480     32K
  111h   640x480     64K
  112h   640x480     16.8M
  102h   800x600     16
  103h   800x600     256
  113h   800x600     32K
  114h   800x600     64K
  115h   800x600     16.8M
  105h   1024x768    256
  116h   1024x768    32K
  117h   1024x768    64K
  118h   1024x768    16.8M(*)
  107h   1280x1024   256
  119h   1280X1024   32K(*)
  11Ah   1280X1024   64K(*)

  (*) requires 4Mb memory

       Text Modes
  Mode   Columns     Rows

  108h      80         60
  109h     132         25
  10Bh     132         50
  10Ch     132         60

- More Information

  More information is available in the WordPad file "online.doc". This 
  file is included on your Matrox floppy disk, and installed in your 
  \Program Files\Matrox MGA PowerDesk\ folder.


MGA Diagnostic program
----------------------

Close all other programs before running MGA Diagnostic. 

The MGA Diagnostic program tests the bus mastering feature of your system and 
if another program is using bus mastering at the same time (a 3D game for example), 
a system error may occur.


IRQSET.EXE program
------------------

If you have a 3D program for Windows 95 that doesn't start or stops 
running, you may be having a problem with bus mastering. The Matrox card
needs an Interrupt Request (IRQ) number for bus mastering to work properly 
and some computers do not automatically give the Matrox card an IRQ. You 
can manually assign your Matrox card an IRQ through the IRQSET.EXE program 
we provide.

First, check for an IRQ number:

  (1) Right-click on the "My Computer" icon on the Windows 95 desktop.
  (2) Click on the "Properties" menu item.
  (3) Click on the "Device Manager" tab.
  (4) Click on the "Properties" button.
  (5) Check if the MGA driver appears in the IRQ list. 
      If it does, there is no need to manually assign an IRQ and you
      can stop here.
      IF NOT, note which IRQ number between 10 and 12 is not used and
      continue with the instructions below.

To manually assign an IRQ:

  (1) Open your "autoexec.bat" file with the Windows 95 Notepad program. 
      Your autoexec.bat file is in the root directory of your boot drive.

  (2) Add a line to your autoexec.bat with the path to "IRQSET", 
      followed by the IRQ you want to use (the unused number you noted 
      above). For example, to assign your Matrox card IRQ 10, insert the
      following line in your autoexec.bat (INCLUDING the quotation marks):

          "C:\Program Files\Matrox MGA PowerDesk\IRQSET" A

      (The path you use MIGHT be different if you have a customized 
      installation of MGA PowerDesk on your computer.)

      The above example is for IRQ 10. To use a different IRQ, replace 
      "A" with ONE of the following letters (capitalized):

          B (for IRQ 11)
          C (for IRQ 12)

  (3) Save the changes to the autoexec.bat and exit Notepad.

  (4) Restart your computer for the changes to take effect.

For more information on bus mastering, see "Troubleshooting" in the 
Installation Guide. 
