OPTi 82C931 931 Sound Card Driver

This software package contains the drivers for Windows 95, Windows 3.1 and  DOS.  For Windows 95 users, please refer to the "Windows 95" section.  For Windows 3.1X/DOS users, please refer to the "Windows 3.1X/DOS" section.

Install Instructions

                  ===========
                  Windows 95
                  ===========

1. DRIVER INSTALLATION

    Insert the sound card into your system and power on the computer.
    Windows 95 will detect the sound card and prompt you for the
    driver. Insert the driver diskette into the floppy drive. Windows
    95 will step through the installation procedure.

    Notes:
    - The 82C931 is a Plug-and-Play audio device. It consists of a
      number of logical devices that could be detected and reported by
      Windows 95.  These devices are:
        . Gameport Joystick :             Joystick interface
        . OPTi Plug-N-Play MPU-401 :      MPU-401 interface
        . OPTi Plug-N-Play Sound System : Audio device
        . (optional) Standard IDE/ESDI Hard Disk Controller

    - If there is no audio device installed in the system before,
      Windows 95 would prompt user to insert the Windows 95 CD to
      add related audio utilities (like volume control, sound recorder,
      etc.) into your system.


2. RESOURCE RECONFIGURATION

    The 82C931 sound device is a fully Plug-N-Play device. Windows 95 can
    detect its available resources and allocate them on-the-fly in the
    installation sequence. In some rare cases, however, resource conflict
    could occur and it is flagged by the yellow exclamation mark shown at the
    Device Manager of the Windows 95.
    
    To resolve the conflict, click on the SYSTEM icon in the Control Panel
    folder and choose Device Manager. From Device Manager,
    double click the "Sound, video and game controller" category and the
    list of installed devices will be displayed. Double click on the
    device with yellow exclamation mark. Choose Resource. Determine the
    conflict cause thru the hints shown in the "Conflicting device lists".
    Change the resource (e.g. I/O address, DMA, IRQ) accordingly. The resource
    setting will be reconfigured.

    
3. AUDIO CONFIG IN WINDOWS 95's DOS BOX

    The audio device's configuration is valid in both Windows 95 and dos box.
    The majority of the audio applications should be running fine in DOS box.
    It was found, however, that certain soundblaster games could launch from
    dos box but failed to produce digital sound or FM music. These games could
    not use the pre-assigned resources but intead expect the popular
    soundblaster settings,i.e., IRQ=5 DMA=1 I/O=220h. As a result, the resource
    mismatch causes the problem.  To correct it, make sure the games' setting
    match the assignment shown at Device Manager.
    
   
    To find out what resources are currently assigned to the sound card,
    proceed to open the properties box associated with the "OPTi
    Plug-N-Play Sound System" (Control Panel / Device Manager, under
    "Sound, video and game controller" category) and select the Resource
    tab. The third I/O Address range in the Resources box is used for
    DOS games.  The first Direct Memory Access is used for playback.  We
    recommend you select the following resources:
          Input/Output Range:    220
          Interrupt request:     5 or 7
          Direct Memory Access:  0 or 1
        
    Choose these resources as appropriate and select OK. The Device
    Manager will dynamically configure the hardware to use the resources
    you've selected.  At this point, you may setup your DOS game with the
    settings which you have just chosen.

4. MPU-401 WAVETABLE CONFIGURATION

    if you have a wave table device on board or attached to your
    sound card, you should follow the recommended steps listed above but
    check on the "OPTi Plug-N-Play MPU-401" device settings instead.
    You may need to write down its current settings which might be needed
    for enabling the general MIDI support in some DOS games.

5. HELPFUL SETTINGS FOR DOS GAMES

    To ensure an ideal environment for DOS games, it is recommended that
    you modify the Idle Sensitivity property of the DOS Game environment
    to High. To do this, press the ALT+ENTER keys to change to a DOS Box
    Window (if not already in a Windowed session) and click on the top left
    hand corner of the DOS Box Window. A drop down menu will appear and
    at which point you should select Properties. Select the Misc tab and
    proceed to modify the aforementioned property.

    When you are playing DOS games in DOS box, you can use hot keys to
    adjust the volume:
    -Alt + Shift + PageUp   :  Turn up master volume        
    -Alt + Shift + PageDown :  Turn down master volume      
    -Alt + Shift + End      :  Mute/unmute master volume    


6. AUDIO SUPPORT UNDER REAL MODE DOS

    In Windows 95, the audio driver is requested and installed automatically
    after the plug-and-play sound card is plugged in. After the driver is
    successfully installed, user would need to run the following to install
    the DOS configuration utility, SNDINIT.EXE, which is USED to initialize
    the sound card for audio application in real mode DOS.

    To install this utility, insert the 82C931 Drivers Installation diskette
    in the floppy driver. Click on "Start" and choose "run".  Type "a:SETUP.EXE"
    The InstallShield Wizard will guide you through the installation of
    the DOS cofiguration utilities for 82C931.  

    Note: The resources setting in real mode DOS is independent of the settings
      in Windows 95.  So you can configure your sound card DOS
      resource separately. Type SNDINIT.EXE under DOS prompt, the
      DOS resource configuration user interface will be brought up.
      You can select the resources, adjust volume settings, and do sound
      test to see if the resources or the settings are OK.

       The command options of SNDINIT.EXE:

           /?     - Show all the command options

           /b     - Setup and initialize the sound card in batch mode.              

           None   - When no option is specified, it will activate the
            configuration program. Use this program to
            change the settings of your sound card.
            

                ================
                Windows 3.1X/DOS
                ================


1. DRIVER INSTALLATION

    Insert the sound card into your system and power on the computer.
    Bring up Windows 3.1, and insert this installation diskette to
    your floppy drive, then go to Program Manager | File | Run,
    select the SETUP.EXE file in the diskette.  The InstallShiled Wizard
    will guide you through the installation process and install the
    Windows 3.1X/DOS drivers and utilities.

    Your AUDOEXEC.BAT and CONFIG.SYS will be changed for using sound
    card under DOS environment.  Please refer to the user's manual
    for more details.

    The InstallShiled Wizard will create an "82C931 Application" group
    in Windows 3.1.  This consists of audio programs and utilities.
   

2. RESOURCE RECONFIGURATION

    During the driver installation, the installation program interfaces
    with the system BIOS and chooses a set of available resources for audio
    device.  These resource settings could be modified later by using the
    configuration program.

    The resource settings in Windows 3.1X and DOS are independent of each
    other. The following describes the steps to go through for reconfiguring
    resource setting in Windows 3.1X and in DOS mode:

    In Windows 3.1, go to Program Manager | Control Panel | Drivers. Select
    "OPTi 82C931 Audio Driver". Click on Setup, the configuration dialogue box
    will be brought up.  Changing the setup would cause the Windows 3.1 to
    restart to make the new resources take effect.

    In DOS environment, change to 82C931 directory and run SNDINIT.EXE.
    The DOS configuration interface will be brought up.  You can change thge
    hardware settings, perform sound test to see if the setting works out
    properly, or adjust the volume settings.
     
    The command options of SNDINIT.EXE:

     /?     - Show all the command options

     /b     - Setup and initialize the sound card in batch mode.

     None   - When no option is specified, it will activate the
          configuration program. Use this program to
          change the settings of your sound card.None   
            
    However, when Intel's CM (Config Manager) is present, you need to
    use ICU to change the sound card resources.


3. AUDIO CONFIG UNDER WINDOWS 3.1X's DOS BOX

    The audio device's configuration is valid in both Windows 3.1X and dos box.
    The majority of the audio applications should be running fine in DOS box.
    It was found, however, that certain soundblaster games could launch from
    dos box but failed to produce digital sound or FM music. These games expect
    the popular soundblaster settings, i.e., IRQ=5 DMA=1 I/O=220h. If the config
    in Windows 3.1X is set differently, the resource mismatch would cause the
    problem. If you want to play DOS games in Windows 3.1X' DOS box, please note:

      1) Make sure the game's settings match the ones in Windows 3.1X.
    
      2) Sometimes, the Setup of the PIF file of a DOS game is crucial.
     To make a game work effectively under Windows, you probably
     have to try a few alternative options through PIF editor.

      3) Not all of the DOS games can run in Windows' DOS BOX. Please refer
     to games' user manual for suggestions. If the issue persists, try to
     launch the game in pure DOS mode.

4. MPU-401 WAVETABLE CONFIGURATION

    If you have a wave table device on board or attached to your sound
    card, please make sure in the configuration dialogue, the MPU401 interface
    is ON. If users use MIDI keyboard recording, then MPU IRQ has to be selected
    (prefer IRQ = 9).

 

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