                        MGA Power Drivers, v 1.32
                            January 14, 1993

These floppies contain drivers for the following Matrox MGA Ultima and
Ultima-Plus boards:

   PCI/2, PCI/2+, VLB/2, VLB/2+

The following products are included:

   Setup program 
   Windows 3.1 Drivers 
   AutoCAD Driver

Windows NT, OS/2 PM and MicroStation drivers are available through the 
Supplementary driver package v 1.10.                            

                         *** Release Notes ***                    (more...)
                                                                 
Setup and Utilities:
--------------------

- Setup program

  Running the SETUP program to select a monitor is highly recommended,
  particularly if your monitor does not support all the resolutions that
  the board supports.

- VESA driver

  Even though your board can support at least 1280 X 1024 resolution, the
  VESA driver is limited to 1024 X 768. See README.SET file for a complete
  list of VESA modes supported.

Windows Drivers:
----------------

- When you install the Windows drivers, make sure to select a start-up
  mode that you monitor supports. To be safe, you can also run SETUP (to 
  select a compatible monitor) and reboot the system before installing
  the Windows drivers.

- On some systems, CTRL-ALT-DEL will not work properly if executed while a 
  DOS window is opened. 

- Switching to full screen DOS will sometimes freeze the keyboard.
  Workaround: press ALT key to free the keyboard.

- AfterDark is not recommended with the ModeSWITCH driver, because it
  inquires about screen resolution only once, when starting Windows.
  Therefore, if you change the display mode, AfterDark may not properly
  clear the screen.

- ModeSWITCH and Enhanced drivers are slower than the 8-bit 256 color 
  driver. Video for Windows profiler may find these drivers too slow 
  for ideal playback. Workaround: use 8-bit 256 colors driver.

- Device bitmaps:

  The MGA POWER Drivers support a feature of Windows 3.1 that allows
  device bitmaps to be stored in the MGA memory instead of main memory.
  Device bitmaps can increase the performance of MGA drivers if there is
  ample on-board memory.  However when this feature is activated,
  Windows 3.1 is not 100% reliable and could cause some applications to
  crash.  You can disable the device bitmaps feature by adding the
  following line in the MGA.DRV section of your SYSTEM.INI file.

        [MGA.DRV]
        .
        DevBits=OFF 
 
  DeltaGraph 2.0 is one example of an application causing problems.

- All applications accessing the VGA registers while in Windows 3.1
  may cause some unexpected results or crashes.  This is because of
  a hardware limitation.

- The MGA Windows drivers do not work when a monochrome card is installed 
  in the system, whether the MGA card has its VGA enabled or not. We are
  currently investigating this problem to see if it is a software or hardware
  limitation.

AutoCAD Driver:
---------------

- With the VLB/2 and VLB/2+ boards mapped at AC000 (the default) and the Text 
  Window feature disabled, the system will freeze when pressing F1 or typing
  "Shell". This bug will be fixed shortly. Workaround: Map your board at 
  another base address, or enable the Text Window.

- DynaView/3D is not supported on any of these boards: MGA PCI/2, PCI/2+, 
  VLB/2 and VLB/2+. 

- The DynaView driver has some limitations running 3D Studio (2.0 and 3.0).
  Please see README.ACA for the details and workarounds.

- Black vector clean-up is performed transparently (in the background).
  As a result, you may experience slower mouse response and slower text 
  output during the clean-up. That will show up mostly if you move, copy 
  or erase very large drawing areas.

  Workarounds: a) perform a manual "mflush" or "mflushall" when needed, or 
  b) disable auto clean-up all together, through the stand-alone "BLACKVEC" 
  utility, located in your \mga\acadrv subdirectory.

- The HIMEM memory manager hurts the driver performances (in commands such as
  regen, move, copy), so should be avoided if possible. However, the use of a 
  disk cache program is highly recommended in single-screen configuration, 
  even if it requires the use of HIMEM.

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This file is called readme.txt, and is located on MGA Power Drivers, disk #1
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