     OPTi 82C931 Audio Device Driver for OS/2 Warp 3 and Merlin 4.0
                          Version 1.02  Release
                               (04/20/97)

     This is the OPTi 82c931 audio driver release for IBM OS/2 Warp 3
     and Merlin 4.0. Throughout this readme file, 931 refers to OPTi
     82c931 LC, AD, Vandetta and MB versions. Please note that only 931
     AD version supports CD-ROM. All CD-ROM installation descriptions
     below applies only to 931 AD version.

     The OPTi 931 driver supports both OS/2 3.00 and OS/2 Merlin 4.0. 
     Before you install OPTi 931 Device Driver make sure that you have
     installed OS/2 WARP Version 3.00 Revision 8.162 or later.  
     Enter "VER /R" from an OS/2 command prompt to verify. 

     This document describes the means for setting up your Sound Card for
     proper operation under the OS/2 operating system environment. Before
     installing, please read PART 0 What's new in this release. If you
     already have OS/2 installed, please read PART 1; if not, please
     proceed to PART 2 of this document. PART 3 of this document describes
     how to connect your existing or new IDE CD-ROM drive to your Sound Card.
     PART 4 describes the parameter options for the Sound Card setup program
     INIT931.SYS. PART 5 describes how to reconfigure your Sound Card settings
     at a later time. PART 6 describes WIN-OS/2 installation. PART 7 lists some
     known problems detected with this current release; and PART 8 describes a 
     brief trouble-shooting session for problems that may be encountered during 
     and after the installation of the Sound Card device driver. 

	 PART 0 - What's new in this release

         PART 1 - OS/2 Already Installed
                  Installing the Sound Card device driver

         PART 2 - OS/2 Not Installed
                  OS/2 Diskette Installation
                  OS/2 CD-ROM Installation (OS/2 Warp)

         PART 3 - CD-ROM Drive Interface
                  Interfacing a CD-ROM drive to your Sound Card
                  List of CD-ROM drive models supported by your Sound Card

         PART 4 - Options for INIT931.SYS Sound Card device driver

         PART 5 - How to Reconfig the Hardware Settings

         PART 6 - WIN-OS/2 support

         PART 7 - Known Problems

         PART 8 - Brief Trouble-Shooting Session

PART 0 - What's New in this release since v1.01:

        1. New support for Merlin:
           - Retreives sound card PNP resources from OS/2 PNP resource manager
           - Supports OS/2 Voice Type and QuickTime Plugin 
           - new system timer routine for audio stream

        2. Other new changes:
           - Supports sample rates that are not an exact match to codec 
             supported value
           - Support 16 bit DMA (DMA 5 and DMA 6) on 931 MB sound card.
           
PART 1 - OS/2 already installed

        Installing the Sound Card device driver:

        1. Ensure that your Sound Card has been properly installed and power
           on your system and wait for the OS/2 Desktop to appear.
        
        2. From your OS/2 Desktop, open (double click) the OS/2 System folder
           and then open the Command Prompts folder.

        3. Open either the OS/2 Window icon or the OS/2 Full Screen icon to
           start an OS/2 command prompt session.

        4. If you want to install the sound card as the primary sound card,
           or if you are not sure, continue to read this step. Otherwise, 
           go to step 5.
                
           OS/2 is capable to support multiple sound cards. If a previous 
           setup for a sound card other than OPTi 82c931 is not removed from 
           the system, the OPTi 82c931 can only be installed as a secondary
           sound card even if the first sound card is not physically in the 
           system. A secondary sound card doesn't plays system sound and it
           doesn't support OS/2 Voice-type application in Merlin.

           To check if a setup for a primary sound card other than the OPTi
           82c931 exists, go to directory \MMOS2 in the boot drive. 
           Use a editor to open the file MMPM2.INI. For example:
                CD \MMOS2
                E MMPM2.INI
           Check in the [Drivers] section. The lines 
                Waveaudio=....
                Ampmix= ....
                Sequencer=....
           exists if a setup of sound card exists.
                
           If these lines don't exist, then exit the editor and goto step 5.

           If these lines exists and they don't look like the following:
                Waveaudio=IBMWaveOPAudio01
                Ampmix=IBMAmpMixOPAudio01,IBMAmpMixOPLAudio01
                Sequencer=IBMSEQOPLAudio01
           then, a primary sound card setup other than the OPTi 82c931 exists.
           
           You may choose to remove the previous sound card setup by deleting
           the lines:
                Waveaudio=....
                Ampmix= ....
                Sequencer=....
           Save the file and then exit the editor. The installation that 
           follows will setup the OPTi 82c931 as the primary sound card.

        5. Insert device driver diskette into your floppy disk drive.
        
        6. Type "A:MINSTALL" and ENTER.
        
        7. MINSTALL will display 3 options to install - OPTi WAVE OS/2
           Driver, OPTi OPL3 Driver and OPTi WIN-OS/2 Audio Driver. Select
           the options and click "OK". Follows the instruction to complete
           the installation.
        
        8. Type "EXIT" and ENTER to return to OS/2 Desktop.
             
        9. Reboot OS/2.


PART 2  - OS/2 not installed

        OS/2 Diskette Installation:

        1. Install OS/2 and proceed to PART 1 to complete the installation of device driver
	    for your Sound Card.


        OS/2 CD-ROM Installation:

        If you intend to connect a CD-ROM to the CD-ROM interface of your
        sound card and use it for your OS/2 installation, please follow
        the steps below. If not, install your CD-ROM with the interface card
        supplied by your CD-ROM manufacturer and proceed to install OS/2 Warp,
        after your installation, proceed to PART 1 of this document to
        complete the device driver for your Sound Card.

        1. In the OS/2 Warp CD-ROM installation package, you will find two (2)
           "kicker" diskettes - a) Installation Diskette for CD-ROM, and
                                b) Diskette for CD-ROM (Disk 1).

        2. Copy the program INIT931.SYS located in your Sound Card device driver
           diskette to the OS/2 Warp "kicker" diskette labeled "Diskette for
           CD-ROM (Disk 1)".

        3. EDIT config.sys to add the following line immediately before the
           LIBPATH= statement:

	    BASEDEV=INIT931.SYS CDTYPE:I CDBASE:376 CDIRQ:15

        4. Install OS/2 Warp (be sure to install multimedia software support)
	      ************************* note *****************************
              * The OPTi 931 Audio card may be detected by OS/2 install  *
              * as a SB Pro - Remove this by clicking on Multimedia from *
              * the System Configuration menu and select remove from the *
              * Device Selections and Settings menu.			 *
	      ************************************************************
			      
	5. Follow OPTi 931 Audio Device Driver for OS/2 Procedure part 1 above.



PART 3 - CD-ROM Drive Interface (Note: This only applies to OPTi 931's AD version)

        Interfacing a CD-ROM drive to your Sound Card:

        To interface/connect your new or existing CD-ROM drive to your
        sound card, please follow the simple steps below.

        If you are interfacing an existing CD-ROM drive to your sound card,
        you only need to follow steps 1 and 2 below since you should already
        have your existing CD-ROM driver setup in your CONFIG.SYS file.
        However, if your are interfacing a new CD-ROM drive, you will need
        to follow all 3 steps below; in which case, it is recommended that
        your perform step 1 first.


        1. Hardware setup

           To connect your CD-ROM drive to your sound card, you will need
           to setup the correct data connector cable from your CD-ROM to
           your sound card. Please refer to your sound card installation
           manual for more details.


        2. Modifying/Setting the INIT931.SYS setup program

           To interface your new or existing CD-ROM drive to your Sound Card,
           use an editor to open the CONFIG.SYS file for editing and locate
           the line "BASEDEV=INIT931.SYS..."  This line should be at the first
           line of the file. Insert the following "CDTYPE:" option into the
           line and when completed, it should read:

           BASEDEV=INIT931.SYS CDTYPE:X CDBASE:XXX CDIRQ:X

           where <model> is the CD-ROM model denoted by the following characters:
                       I       - stands for IDE (secondary)

           For example, the following enables the interface for a SONY IDE CD-ROM.

           BASEDEV=INIT931.SYS CDTYPE:I CDBASE:376 

           If the above INIT931.SYS line is not located, proceed to PART 1 of
           this document for details on installing the Sound Card setup program.

           Save the file and proceed to install the CD-ROM driver if needed.


        3. Installing the CD-ROM driver

           Open the Selective Install program located in the System Setup
           folder and click on the icon next to the "CD-ROM Device Support"
           entry.  A window with the list of OS/2 supported CD-ROM drivers
           will appear. Select (click on) the CD-ROM driver name belonging
           to your CD-ROM model and click on OK to confirm. Click on OK to
           start your CD-ROM driver installation.

           If you have already successfully connected your CD-ROM drive
           to your sound card as detailed in your installation manual, you
           may shut down OS/2 and reboot your system for the changes to
           take effect. If not, please proceed to connect your CD-ROM drive
           to your sound card after shutting down OS/2 and switching off
           your system.



           Only IDE CD-ROM drive models are supported by your Sound Card.
   

PART 4 - Options for INIT931.SYS Sound Card Setup Program

        The options for INIT931.sys are different under Warp 3 and Merlin.
        
        The following lists the available options for the INIT931.SYS
        sound card setup program under Warp 3:

          MODE:   wss, sb            (default Windows Sound System)
          BASE:   220, 240           (for Sound Blaster mode, default 220)
                  534, E84, F44, 608 (for Windows Sound System mode, default 534)
          
          CDTYPE: None, IDE (default None)
                  One character is adequate (e.g. CDTYPE:N CDTYPE:I)
          
          CDBASE: None, 376
                  IDE       - 376      (fixed)
          
          CDIRQ:  None, 15
                  IDE       - 15 (fixed)
          
          SBIRQ:  5, 7, 10, 11 (default 7)
          SBDMA:  1, 2, 3 (default 1)
          
          WSSIRQ: 7, 9, 10, 11
          WSSDMA: 0, 1, 3 (default 1)
          
                  NOTE: The WSS IRQ and DMA are specified here
                        The audio PDD will query INIT931.SYS to 
                        learn of the device settings.
        
          GAMEPORT: 0,200,201,202,203,204,205,206,207  (0 disabled)
        
        Under Merlin 4.0. There's no options for INIT931.sys. INIT931.SYS
        directly queries Merlin PNP resource Manager to retreive all device
        resources.

PART 5 - How to Reconfig the Hardware Settings

        
        Under Warp 3. Type "c:\sound931\minstall" and enter, then follow the
        directions from Part 1, step 8.  Directory "SOUND931" was created in 
        root directoy during the first installation process.  It contains the 
        same files as the installation disk.
        
        Under Merlin 4.0. PNP resources are used so there is no need to 
        reconfig the hardware settings.

PART 6 - WIN-OS/2 support 

         Run MINSTALL and select OPTi WIN-OS/2 Audio Driver to install for
         WIN-OS/2 support.
         Before starting a WIN-OS/2 session, be sure to close all OS/2 Audio
         applications.

PART 7 - Known Problems
       
PART 8 - Brief Trouble-Shooting Session

        Problem:  OS/2 cannot detect your sound card and/or CD-ROM
        Solution: Ensure that the BASEDEV=INIT931.SYS... line is located  
                  immediately before the LIBPATH= statement:

        Problem:  No startup sound when starting OS/2
        Solution: Check if System Sound is enabled

        Problem:  Sounds keep repeating
        Solution: This is due to an interrupt conflict on your system. To
                  use a different interrupt selection, open the CONFIG.SYS
                  file for editing and change the SBIRQ option in the
                  INIT931.SYS line to a different interrupt. 

        Problem:  DOS games do not work under OS/2 DOS session
        Solution: Run OS/2 Add Programs located in the System Setup folder
                  to ask OS/2 to add the set of DOS games on your system.
                  This allows OS/2 to setup the DOS session settings best
                  suited for your individual games such as DOOM.

                  If the DOS game still does not run, this may be due to
                  the incompatibility of the game with OS/2. Consult the
                  OS/2 newsgroup - comp.os.os2.games on the internet for
                  FAQs relating to this subject, or the FTP site -
                  hobbes.nmsu.edu.

        Problem:  IDE CD-ROM does not work
        Solution: Ensure that the IDE CD-ROM jumper is closed on your sound
                  card. Consult your sound card manual for details.
        
        Problem:  Compact Disc player does not generate sound.
        Solution: Go to Digital Audio. Under OPTIONS, select Monitor input.
        
        Problem:  MINSTALL did not add the "BASEDEV=INIT931.SYS.." statement
                  to config.sys.
        Solution: Reduce the length "LIBPATH=.." statement in config.sys to
                  255 characters or less.

