                 Advanced Gravis Computer Technology Ltd.

       HEAD OFFICE:                       US DISTRIBUTION CENTER:
       3750 North Fraser Way,             #101 Suite H, 3140 Mercer Ave.
       Burnaby, BC, Canada                Bellingham, WA, USA
       V5J 5E9	98225

       Tel (604) 431-5020  Fax (604) 431-5155   FTP: ftp.gravis.com
       WWW: http://www.gravis.com         Email: ntsound@gravis.com
  _________________________________________________________________________

                    INSTALLATION INSTRUCTIONS AND README

                                 for the

                     UltraSound Plug & Play Windows NT
                Driver / Software Installation Instructions

                               Public Beta 2

                            -  July 11, l997  -
  _________________________________________________________________________


  CONTENTS

     1. Introduction
     2. Installation of the Windows NT Plug & Play Subsystem
     3. Running the UltraSound Plug & Play Windows NT Driver Uninstall
     4. Installing the UltraSound Plug & Play Windows NT drivers
     5. Using the 4 Megabyte RAM patch set from the UltraSound CD-ROM
     6. Using other RAM patch sets
     7. Troubleshooting
     8. Bugs fixed


  1. INTRODUCTION

     Enclosed in this package are drivers and instructions for using the
     UltraSound Plug & Play in Windows NT. Please read through this document
     completely before beginning installation process.

     It is  recommended you print this file so you have the instructions
     handy during the installation process. It is also recommended that you
     copy all these files to a floppy in the A: drive and install from
     there.

     You must log into Windows NT as "administrator" otherwise the
     installation will not be successful. If you are using a non-English
     version of NT that does not use the word "administrator", create a
     user with full admin privileges and you should then be able to perform
     the installation as that user.


  2. INSTALLATION OF THE WINDOWS NT PLUG & PLAY SUBSYSTEM

     The PnP subsystem of Windows NT 4.0 must be installed prior to
     installing the UltraSound drivers.  If the PnP subsystem is already
     installed, go to section 3.

     NOTE: The Windows NT PnP subsystem is not normally installed during the
           Windows NT installation process, even if you have ISA Plug & Play
	   cards in your system. Most people will need to follow this step.

     Step 1: Insert the Microsoft Windows NT 4.0 CD-ROM into your CD-ROM
             drive.

     Step 2: When the Windows NT setup screen show up, select "Browse this
             CD". (Alternatively you can browse using Windows Explorer).

     Step 3: Browse to the directory \DRVLIB\PNPISA\X86, right click on the
             file PNPISA.INF (the file that looks like a notepad) and select
	     "Install".

     Step 4: When prompted to restart your computer, select "Yes". When
             Windows NT restarts, you will need to follow the instructions
             in section 4.


  3. RUNNING THE ULTRASOUND PLUG & PLAY WINDOWS NT DRIVER UNINSTALL

     If you wish to install over existing UltraSound Plug & Play drivers, or
     you have previously installed the PnP subsystem but did not install any
     drivers for the UltraSound, you must follow this step.

     Step 1: Run UNINSTNT.EXE included in this package, either by selecting
             "Run" from the Start menu, or by double clicking on it from
             Windows Explorer.

     Step 2: Select OK to remove any drivers and clear the system registry
             of UltraSound Plug & Play information.

     Step 3: When prompted to restart your computer, select "Yes". When
             Windows NT restarts, you will need to follow the instructions
             in next section.


  4. INSTALLING THE ULTRASOUND PLUG & PLAY WINDOWS NT DRIVERS

     When Windows NT restarts after following the steps in section 2 or
     section 3, make sure you log in as "administrator". The installation
     proceeds as follows:

     Step 1: A "New Hardware Found - UltraSound Plug & Play (Synth & Codec)"
             dialog will appear, indicating Windows NT has found the
             UltraSound Plug & Play.

     Step 2: Select "Driver from disk provided by hardware manufacturer",
             then click "Ok".

     Step 3: At the "Install from disk" dialog, select A: drive and click
             "Ok". If you are not installing from drive A:, select "Browse"
             and browse to the directory where the UltraSound Plug & Play
             drivers are located.

     Step 4: Select "UltraSound Plug & Play Synth/Codec" and click "Ok".

     Step 5: The "Ultrasound PnP COnfiguration" screen should appear.
             If there are no conflicts, select "Ok". If there are conflicts,
             change the resource values to clear them, then select "Ok".

	     NOTE: Windows NT does not always correctly identify all
             conflicts. See the troubleshooting section below if you have
             audio problems after completing the installation.

     Step 6: If prompted for an IDE driver, select "Windows NT Default
             Driver", or "Do not install driver" if you do not wish to use
             the UltraSound's IDE interface.

     Step 7: If prompted to install "UltraSound Plug & Play (SB Compatible
             Audio)" or "UltraSound Plug & Play (MPU-401 GM Music", select
             "Do not install driver"; these items are not currently available
             and this should eliminate the finding of new hardware when
             restarting Windows NT.

     Step 8: When prompted to restart, select "Yes". When Windows NT
             restarts, audio should be working correctly.


  5. USING THE 4 MEGABYTE RAM PATCH SET FROM THE ULTRASOUND CD-ROM

     If you have already installed the 4 megabyte patch set for use in
     Windows 95 or Windows 3.x, it should already be accessible in Windows
     NT, provided you installed it to the C:\GRAVIS\ULTRASND\PATCHES
     directory. Otherwise follow these steps.

     Step 1: Using EDIT, add the following line to C:\AUTOEXEC.BAT:

             SET INTERWAVE=C:\GRAVIS\ULTRASND

	     This line may already be there from a Windows 95/Windows 3.x
             installation.

     Step 2: Insert your UltraSound Plug & Play CD into your CD-ROM drive.

     Step 3: When the Setup runs, click the "4MB Patch Set" button.

     Step 4: Install the patch set to C:\GRAVIS\ULTRASND\PATCHES

     The patch set should now be accessible in Windows NT. To select it,
     load the "InterWave Properties" from control panel, select the "MIDI"
     tab, select the "4MB RAM Patch Set" and click "Apply".

     NOTE: If you really want to use the patch set from a different
           directory, you must change the IWDIR environment variable.
           To do this, run REGEDIT and change the key:

	   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\
           Session Manager\Environment\IWDIR


  6. USING OTHER RAM PATCH SETS

     If you have used other RAM patch sets with the UltraSound Plug & Play
     under Windows 95 or Windows 3.x, you would have had to edit the IW.INI
     file. The Windows NT drivers do not use the IW.INI file, instead they
     store all information in the system registry.

     To use your own patch set, you will need to manually edit the registry
     with regedit, by changing keys under HKEY_LOCAL_MACHINE\SYSTEM\
     CurrentControlSet\Services\guspnp\Parameters\Device0. Information is
     organized in the same manner as the IW.INI file, except that when
     defining patch directories, environment variables (such as IWDIR)
     can be automatically expanded.


  7. TROUBLESHOOTING

     The most common cause of problems are resource conflicts. Tell tale
     signs are system lockups when trying to play sound is being played
     (DMA channel conflict), or  looping sounds (IRQ conflict).
     Unfortunately Windows NT does not correctly identify all conflicts.

     If you think you have a DMA channel or IRQ conflict, try changing
     the resource value and restarting your system. Resources (and other
     UltraSound settings) can be changed in the "InterWave Properties"
     control panel applet.
     (Start->Settings->Control Panel, InterWave Properties).


  8. BUGS FIXED

     Unable to change Patch Set:
     Has been fixed. A bug in guspnp.sys could cause this on a per machine
     basis, the return value of one of the kernel functions was not set.
     This problem seems to only show up in a free build version of the
     drivers, on some machines.  This has also been fixed.

     New Hardware Found messages at startup:
     Fixed with use of new .INF file allowing user to not install drivers.

     Changing volume in various apps causes drivers crash:
     Many different apps that showed a volume slider could cause the drivers
     to crash, or go to zero volume when the volume was changed.  This was a
     problem in the handling of the WODM_SET_VOLUME message.  This has been
     fixed.

     Sound breaks up in Diablo under Service Pack 3:
     We increased the number of interrupts per second. This seems to have
     improved performance quite a lot. 

     Interwave Control Panel not removed during uninstall:
     Has been fixed.

     Midi in doesn't work:
     This was a timing issue that had happened before the first release.
     It appears to have resurfaced during our last round of changes.
     Has been fixed.


  [END OF FILE]
