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Windows NT Device Drivers Version 3.1.74              November 21, 1996
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READ THIS FILE COMPLETELY BEFORE ATTEMPTING TO USE THIS PRODUCT !

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Contents

1.0     Introduction
  1.1     Supported Resolutions
2.0     Installation Notes for Windows NT
  2.1     Uninstalling the Windows NT drivers
3.0     Known Problems
4.0     Reporting Problems


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1.0     Introduction

The Graphics device drivers supplied here are for the Microsoft Retail
Release of the Windows NT 3.51 operating system.

The drivers will substitute 640x480 by 256 colors if the mode selected is
NOT supported by the mach64/mach32/mach8 graphics hardware.

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1.1     Supported Resolutions.

                    256 colors    65535 colors    16.7 million   TRUE color
     Resolutions    8 bpp         16 bpp          24 bpp         32 bpp *

     640 x  480     2/4MB         2/4MB           2/4MB          2/4MB
     800 x  600     2/4MB         2/4MB           2/4MB          2/4MB
    1024 x  768     2/4MB         2/4MB           4MB            4MB
    1152 x  864     2/4MB         2/4MB           4MB            4MB
    1280 x 1024     2/4MB         4MB             4MB            N/A
    1600 x 1200     2/4MB         4MB             N/A            N/A

2/4MB  -  Supported on 2 or 4 Megabyte mach64 products
4MB    -  ONLY supported on 4 Megabyte mach64 products
N/A    -  Not Supported

*  Note:  TRUE color provides 16.7 million colors using a 32 bpp data
          format.  TRUE color provides higher performance, but uses more
          graphics memory.

          TRUE color is ONLY available for mach64.

          TRUE color at 800x600 is not available on all 2MB cards.

          TRUE color is not available on all DAC types.

** Note:  24 bpp is available ONLY with the linear aperture.

** Note:  Not all color depths are supported at all refresh rates.

** Note:  1600x1200 is not available on all DAC types.

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2.0     Installation Notes for Windows NT 3.51

This driver package contains:

  - ATI.SYS        (ATI Graphics miniport driver)
  - ATI.DLL        (ATI Graphics display  driver)
  - OEMSETUP.INF   (setup files used by Windows NT Setup program)
  - TXTSETUP.OEM
  - SSDPMS.SCR     (DPMS Screen Saver)
  - SSDPMS.HLP
  - ATI_VID
  - This README file

They are located in the \NT351 sub-directory.

Procedure:

1. Run the Windows NT Display program located in the Control Panel, Main
   group.

2. Select Change Display Type.

3. Select Change... from the display options.

4. Select Other...

5. NT will prompt you for the correct path, enter A:\NT351 where A: is
   the drive containing the mach64 Driver Disk, or enter the drive for the CD-ROM.

6. An "ATI Graphics Accelerators" option will appear after reading the diskette/CD;
   with this option selected, click on the INSTALL button.

7. Windows NT will once again prompt for confirmation.
   All appropriate files are then copied to the hard disk.

8. Restart Windows NT.  Windows NT will start up using the mach64 drivers.

9. NT will boot into 640x480 mode and start the Display applet allowing
   for mode selection.

Note: If you select a color depth or resolution not supported by your
      card, NT will substitute 640x480 in 256 colors for the display.


2.1     Uninstalling the Windows NT drivers

How to uninstall the mach64 Windows Device Driver.  There are TWO ways to
do this without re-installing Windows NT.

ONE method is:
    CD \winnt351\system32\drivers
    ren ATI.sys  ATI.ati

    Windows NT looks for ATI.SYS drivers at boot time, so if it cannot
    find it, it cannot use it.

SECOND method is:
    While running Windows NT, execute the Win NT Setup program.
    Select a NON-mach64 driver  (try VGA-compatible)

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3.0     Known Problems

Some applications do not handle 24bpp and 32bpp properly resulting in the
colors not looking right.

What to do if "ACCELERATOR not found" message appears:

Is there another adapter card in the system that CONFLICTS with I/O
locations in the 350-35F hex range?  Relocate the I/O to 300 to 31F range.

Attempting to run the mach64 Install program under NT will report
"Mach64 Adapter not detected".  The Install program must be run from DOS.

In certain instances after returning from a full-screen DOS session, the
mouse pointer may appear as a black square on the screen.  For example, if
you run "Introducing Windows NT," and move the mouse pointer off-screen before
entering full-screen, then after you return to the desktop, this effect may
appear.  This is a problem with NT's GDI.

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4.0     Reporting Problems

If you experience any difficulties, open the file REPORT.TXT and complete
the Problem Report form.

