                      ==========================
                      Release Notes - Windows NT
                      ==========================

Quantum3D Obsidian2 90 Series and 200SB Series
Release 4P
12 June 1998

Copyright 1997-1998  Quantum3D, Inc.  All Rights Reserved.

=====================================================================
Quantum3D, Inc.
2520 Mission College Blvd, Suite 202
Santa Clara, California, 95054-1215
Voice: (408) 919-9999   Fax: (408) 919-9980
Web Site: http://www.quantum3d.com
Technical Support: support@quantum3d.com
=====================================================================

This release includes drivers and utilties for the Obsidian2 90 and
200SB Professional Series of Graphics Accelerators with 
Windows NT 4.0. with Service Pack 3.

CONTENTS
========
   I.  Minimum System Requirements
  II.  Base Drivers Feature Notes
 III.  Before You Begin
  IV.  Installation Procedures
   V.  Obsidian2 90 Series and 200SB Series
       A. Windows NT 4.0
       B. Notes on the Obsidian2 200SB Series
  VI.  Testing the Obsidian2
 VII.  Software Utilities
VIII.  Removing the Obsidian2 Drivers
  IX.  Frequently Asked Questions


I. Minimum System Requirements
===============================
- PCI 2.1 compliant system
  (AGP compliant for 90-4440 AGP, 90-4440 AGPTV)
- Pentium(R) class or faster processor
- 16MB of system memory
- Available PCI expansion slot (ATX form factor recommended)
  (Available AGP expansion slot for 90-4440 AGP, 90-4440 AGPTV)
- Windows 95 (or later)
- Windows NT 4.0 Service Pack 3 (or later)
- DirectX 5.0 (or later - Windows 95 only)
- Windows desktop (VGA) display adapter or MGV Companion VGA
  daughtercard (200SB Series only)
- VGA compatible monitor


II. Base Driver Feature Notes
===============================
The Quantum3D Obsidian2 drivers included with this release are based
on Glide 2.50 and Direct3D 2.16 drivers.

- The Obsidian2 90 Series can operate at these video timings:
        Resolution   Refresh Rate
        512 x 384    72,75,85,120 Hz
        640 x 400    70,75,85,120 Hz
        640 x 480    60,75,85,120 Hz
        800 x 600    60,75,85,120 Hz
        960 x 720    60,75,85 Hz (Glide only)
        1024 x 768   60,75,85 Hz

- The Obsidian2 200SB Series can operate at these video timings:
        Resolution   Refresh Rate
        512 x 384    72,75,85 Hz
        640 x 400    70,75,85 Hz
        640 x 480    60,75,85 Hz
        800 x 600    60,75,85 Hz
        960 x 720    60,75,85 Hz (Glide only)
        1024 x 768   60,75,85 Hz

- Obsidian2's TV Output capabilities operate only when Voodoo2 
  Graphics is running and at these video timings:
        Resolution  Refresh Rate    Format  Scan Option
        640 x 480       60 Hz       NTSC    Overscan and Underscan
        640 x 480       50 Hz       PAL     Overscan and Underscan
        800 x 600       60 Hz       NTSC    Underscan
        800 x 600       50 Hz       PAL     Overscan and Underscan


III. Before You Begin
=====================
Whether you are installing the Obsidian2 for the first time or 
upgrading existing drivers for the Obsidian2, follow the procedure
below before you begin the driver installation.
 1. From the Start menu select Settings then Control Panel.
 2. Double-click on Add/Remove Programs, and select the 
    Install/Uninstall tab.
 3. Scroll through the list and select any existing drivers for 3Dfx
    based products, including ones from Quantum3D.
 4. Click on the Add/Remove button.  When the Uninstall is complete,
    shut down the computer.
 5. Remove any other 3Dfx adapters from the system.  Follow the 
    hardware installation procedure in the Obsidian2 Installation 
    Guide for your appropriate Obsidian2 adapter.


IV. Installation Procedures
===========================
NOTE: A minimum system requirement for the Obsidian2 with Windows NT
4.0 is Service Pack 3.  If you have not upgraded your Windows NT 4.0
operating system to Service Pack 3, you must do so before installing 
the Obsidian2 accelerator.


 V. OBSIDIAN2 90 Series and 200SB Series
========================================
 A. Windows NT 4.0
 -----------------
 Follow the procedure below to install the drivers and utilities for 
 the Obsidian2 90 Series and 200SB Series.
 1. Start Windows NT. 
 2. Log onto the computer with an account that has local Administrator
    privileges (this is required for updating the system registry).
 3. Insert the Obsidian2 Installation CD into the CD-ROM drive.
 4. From the START menu, select Programs and then Windows NT Explorer.
 5. Click on CD-ROM drive in the All Folders panel.
 6. Double click on the WINNT directory in the Contents panel.
 7. Right mouse click on OBSIDIAN.INF in the Contents panel and 
    select Install.  Windows NT will copy the Obsidian2 device 
    drivers to your hard drive.
 8. You will then be prompted to restart the computer. 
    Click on the Yes button.
 
 B. Notes on the Obsidian2 200SB Series
 --------------------------------------
- You may decrease the chance of operation issues by verifying that 
  you have the latest system BIOS for your motherboard from the 
  motherboard manufacturer.


VI. Testing the Obsidian2
=========================
To verify that your Obsidian2 is operating properly, launch the 
Glide Test applets from the Obsidian2 tab in the Display Properties.
 1. From the Start menu select Settings and then Control Panel.
 2. Double click on the Display icon. The Display Properties will 
    appear. Click on the Obsidian2 tab.
 3. In the Glide section of the Obsidian2 tab, click on the Test 
    button.  The Glide test applet should appear on the screen at 
    the default settings.
    NOTE: Direct3D is not supported under Windows NT 4.0

If the Glide applet does not appear on the screen, refer to 
Section 3: General Troubleshooting of the Obsidian2 Installation
Guide, the Online Help or the Frequently Asked Questions
section of the Driver Release Notes for additional assistance.


VII. Software Utilities
=======================
During the Obsidian2 driver installation, a number of diagnostic 
utilities are installed under the following folder:

    C:\Program Files\Q3D\Obsidian.2P\WinNT

This section describes the software utilities for the Obsidian2.

GDETECT.EXE
This utility runs from Windows and lists the PCI devices in the 
computer and what memory resources are used by each device.

GMOJO.EXE
This utility runs from Windows and displays the Obsidian adapter 
information such as virtual base address, Vendor ID, chip 
revisions and more. In this information the Pixelfx2 and Texelfx2 
chips are referred to as the FBI (Frame Buffer Interface) and 
TMU (Texture Mapping Unit) respectively.


VIII. Removing the Obsidian2 Drivers
====================================
 1. From the Start menu, select Settings, then Control Panel.
 2. Double-click on Add/Remove Programs, select the Install/Uninstall
    tab.
 3. Scroll through the list and select the Quantum3D Obsidian2 
    adapter listed.
 4. Click on the Add/Remove button.
 5. Shutdown the computer.  Remove the Obsidian adapter from the 
    computer.
 6. When Windows is restarted, the last portion of the removal is
    done automatically.


IX. Frequently Asked Questions
==============================
Q: Why is the Override Application Setting option in the Obsidian2
   tab of the Display Properties dialog checked and not available
   (grayed out)?

A: In order to maintain backward compatibility, environment
   variables set manually will take precedence over configuration 
   options.  Therefore, if you have set environment variables 
   manually, the corresponding configuration option will not be 
   available.  Removing these environment variables and restarting 
   the computer will restore the previously unavailable configuration
   options.
---------------------------------------------------------------------
Q: When TV output is enabled, why are the options for resolution 
   restricted to 640 x 480 or 800 x 600 at 60 HZ refresh rate for 
   NTSC and 50 Hz refresh rate for PAL TV output?

A: Enabling TV output restricts the resolution and refresh rate 
   options in order to display the image correctly on the TV monitor.
---------------------------------------------------------------------
Q: Why do some applications have corrupted display when the Wait for
   Vertical Retrace option in the Obsidian2 tab of the Display
   Properties dialog is not checked?

A: Disabling Wait for Vertical Retrace may increase the performance
   of some applications because the hardware is not waiting for Vysnc
   to the display monitor.  However this may cause tearing of
   images in the application. For benchmarking purposes it is
   recommended that you disable Wait for Vertical Retrace for
   maximum performance.
---------------------------------------------------------------------
Q: When attempting to run an older Glide base application, why does 
   an error message "missing DLL file 'GLIDE.DLL' not found" appear?

A: The application is attempting to specifically access an older
   version of a Glide file GLIDE.DLL which has been replaced by the
   current Glide file. Contact the software manufacturer for an 
   updated version of the application.
---------------------------------------------------------------------
Q: When using a TV monitor, why is the display corrupted?

A: Occasionally the output to the TV monitor may display incorrectly.
   Simply exit the application and restart it.
---------------------------------------------------------------------
Q: Why is the Direct3D Settings Section grayed out under 
   Windows NT 4.0?

A: Direct3D is not supported under Windows NT 4.0.  Direct3D is only
   supported under Windows 95 and Windows 98.
