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Windows NT Device Drivers Version 1.41                   
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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     DPMS Support
4.0     Known Problems
5.0     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 operating system.

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

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1.1     Supported Resolutions.

                    256 colors    65000 colors    16.7 million   TRUE color
     Resolutions    8 bpp         16 bpp          24 bpp         32bpp *

     640 x  480     2/4MB         2/4MB           2/4MB          2/4MB
     800 x  600     2/4MB         2/4MB           4MB            2/4MB
    1024 x  768     2/4MB         2/4MB           4MB            4MB
    1280 x 1024     2/4MB         4MB             4MB            N/A

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

The current release of the Windows NT driver supports the following 
resolutions on ISA mach64 products:

                    256 colors    65000 colors    16.7 million   TRUE color
     Resolutions    8 bpp         16 bpp          24 bpp         32bpp *
 
     640x480        2/4MB         2/4MB           2/4MB          2/4MB 
     800x600        2/4MB         2/4MB           4MB            N/A
     1024x768       2/4MB         2/4MB           4MB            N/A
     1280x1024      N/A           N/A             N/A            N/A

2/4MB   - Supported on 2 or 4 Megabyte mach64 ISA products
4MB     - Only supported on 4 Megabyte mach64 ISA 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 
          graphic memory.

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

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2.0     Installation Notes for Windows NT

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

Windows NT drivers are included on Disk #2 of this package.  They are
located in the \NT sub-directory.

Procedure:

1. Run the Windows NT Setup program located in the Program Manager, Main
   group.  
   
2. Select Change System settings, from the Options pulldown menu.

3. Select Other, from the display options.
   
4. NT will prompt you for the correct path, enter A:\NT, where A: is
   the drive containing the mach64 Disk #2.

5. A list of all Graphics Accelerator drivers will appears, select
   the resolution and color depth desired.

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

Note: If you select a color depth or resolution, not supported by your 
      card, NT will substitute 640x480, 256 color 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 \winnt\system32\drivers
    ren ATI.sys  ATI.ati
    Windows NT looks for ATI.SYS drivers at boot time, 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     DPMS Support

VESA DPMS-compliant monitors conserve electrical energy by powering down 
during periods of inactivity when the DPMS feature is enabled. 

Auto-shutdown occurs after a defined period of keyboard and mouse inactivity. 
There are three stages for reduced power consumption: Standby, Suspend and 
Off. The amount of power that is saved at each stage is determined by the 
manufacturer of the monitor.

WARNING

Monitors that do not support VESA DPMS can be damaged by activation of the 
DPMS feature.

To enable DPMS support for NT 3.1:

1) Double click on the NT Desktop icon
2) Select the SCREEN SAVERS option
3) Select DPMS from the list of available SCREEN SAVERS
4) Click on the SETUP button, to configure DPMS stand by mode.
5) When DPMS stand by is enabled, you can then configure SUSPEND and OFF 
   time in minutes

Note: The STANDBY time intervolt is determined by the DELAY time set for 
      the SCREEN SAVER function.

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4.0     Known Problems

This driver does not currently support 1280x1024 on ISA mach64 product.

This driver does not currently support 24 bpp at resolutions greater than
640x480 on ISA mach64 product.

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.

1280x1024 is not currently supported on non-linear aperture configurations

24 BPP is not currently supported on non-linear aperture configurations at 
resolutions greater than 640x480.

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5.0     Reporting Problems

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

