OPTi 82C925 Windows 95 Drivers Version 4.03.00.2031 05/14/97 UPDATE This version has been updated from 4.00.25.01 with the following change: - Change the version number to support DirectSound. INSTALLATION PROCESS If you do not have a previous copy of the drivers installed, and you are installing this Sound Card plus Driver package for the first time, you may proceed to the FIRST TIME INSTALLATION section. However, if you are updating your previous installed drivers, you MUST follow the UPDATE PREVIOUS DRIVERS section below in order to succesfully install the new drivers. UPDATING PREVIOUS DRIVERS [Updating "OPTi Plug-N-Play Sound System" Driver] 1. You should have the latest drivers on a floppy diskette ready for installation. 2. Start Windows 95 and proceed to the Control Panel folder and select (double click) the Add New Hardware icon. This will add/update the OPTi Sound Device and it's associated drivers. 3. When prompted by Windows 95 for the Auto-Scan option for detecting new devices on your System - select NO and proceed to the next page. 4. Windows 95 will display a list of known devices that you currently wish to install. Select "Other Devices" eventhough the name of the device is included in the list. This forces Windows 95 to perform a fresh install for your device. Select Next to proceed. 5. Windows 95 will again display a list containing manufacturer names and at which point you should ignore the list and select the "Have Disk..." button. This tells Windows 95 to read special installation instructions from your diskette to correctly install the drivers for your OPTi Sound device. You will have to direct Windows 95 to the proper location of the floppy diskette. 6. Once information from the floppy diskette has been read by Windows 95, a list of devices available for installation will be displayed. This list contains driver setup options pertaining to your Sound Card's capabilities. For example, if your Sound Card has an IDE CD-ROM interface which you wish to connect your IDE CD-ROM to, select the appropriate option to enable this setup. If your Sound Card does not contain any options other than Audio functions, then just select the first option. 7. Windows 95 will now proceed to install the drivers needed for your device and configure your device accordingly. Once your device has been successfully configured, Windows 95 will prompt you to restart your system - select Yes for the new drivers to take effect. YOU MUST REBOOT for the changes to take effect! FIRST TIME INSTALLATION Install the Sound Card into your system and reboot your machine; Windows 95 should detect new PnP resource on your Sound Card and prompt you for the installation files. At this point, insert the OPTi 82C925 Windows 95 Driver diskette into your floppy drive and let Windows 95's Device Manager direct you through the installation of the drivers. When Device Manager finds a new device but cannot determine/find the correct driver for the device, it will prompt you for the location of the drivers associated with the device and will expect that the drivers are from a floppy diskette. At this time, select OK if the option "Drivers from disk..." is enabled and Device Manager will proceed to copy the drivers from the diskette. However, if the option "Windows Compatible Driver" is enabled, select OK as well to direct Device Manager to make use of default drivers for that particular device. RECONFIGURATION OF RESOURCES The OPTi 82C925 device is a fully Plug-n-Play device and all it's resources should be reconfigurable on-the-fly unless due to a similar conflicting device present in the system. To reconfigure the resources, use the SYSTEM icon located in your Control Panel folder and choose Device Manager. From Device Manager, double click the "OPTi Plug-N-Play Sound System" option and the list of installed OPTi Audio devices will be displayed. Double click on the device which you wish to change resources for. Once resources have been changed, the driver will be automatically reconfigured to operate with the new resources and function as before. AUDIO SUPPORT under REAL MODE DOS REAL MODE DOS Support is handled in "COMBO" package only. Please obtain this package to support this option. AUDIO SUPPORT under WINDOWS 95 DOS BOX DOS Game support has been added for this release and is fully functional. During the setup for your DOS games, you must ensure that the current resources assigned to the sound card matches with the current settings requested by your DOS game. 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" (Device Manager) and select the Resource tab. From the Resources box, you should see the current I/O Address range for Input/Output Range Number 1. We recommend the 220 Hex address range as opposed to the 240 Hex be selected as most games support 220 Hex by default. We also recommend the Interrupt and Direct Memory Access settings of 7 and 1 respectively. Reconfigure these resources as appropriate and select OK for Device Manager to dynamically change and update your current resources and configure the hardware. At this point, you may setup your DOS game with the settings which you have just configured. Also, if you have a Wave Table Device on board or attached to your sound card, you should also follow the recommended steps above but this time check on the "OPTi Plug-N-Play MPU-401" device settings instead. You will need it's current settings if you wish to enable General MIDI support in your DOS games. To ensure an ideal environment for DOS games, it is recommended that you modify the Idle Sensitivity property of your 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 above mentioned property. HOT-KEY SUPPORT under WINDOWS 95 DOS BOX The following are the Hot-Keys and their associated channel controls. ++M = Decrease Master Volume ++M = Increase Master Volume ++M = Mute Master Volume FULL-DUPLEX DUAL-DMA SUPPORT To enable Dual-DMA channel operation for simultaneous playback and recording, please ensure the following: 1. The DMA resource settings under Device Manager must be different and paired as follows: Playback DMA: 0 1 3 Recording DMA: 1 0 0 2. The frequency format (eg. 11KHz, 22KHz..) must be the same during simultaneous playback and recording. 3. Full-Duplex is only supported if you have CS4231/CS4248 Class CODECs interfaced with the 82C925 PnP Audio Controller. KARAOKE SUPPORT The customizeable option for supporting Karaoke Sing-A-Long basically turns on the LoopBack channel of the AD1848 class CODEC as well as forcing the input MUX to Microphone. This will ensure that the ADC signal is properly fed back to the output channel for amplification using the DAC volume control. The following options may be specified in the CUSTOM.AddReg section of the INF file. To enable support for Karaoke Sing-A-Long, the following must be specified: ..,Karaoke_Src_Name,,"Voice" To customize default settings for the Mic input gain plus the Loopback attenuation, the following must be specified: ..,"LeftKaraokeMicVol",1,0080 // Low Byte then High Byte ..,"RightKaraokeMicVol",1,0080 ..,"KaraokeLoopBackVol",1,FFFF Valid range is from 0000 -> FFFF ( 0 to 64K ) MIXER CUSTOMIZATION Mixer driver customization info should be specified in the SND925P.INF file which is located in the installation diskette and is required by Windows 95 during installation of the drivers. By default, this file instructs the Mixer driver not to support any customizations and only the manufacturer's default channel mappings and controls are supported. To enable mixer customizations, proceed to the [CUSTOM.AddReg] section in this file and modify the "Default_Codec_Mapping" field from "Yes" to "No". This tells the mixer driver not to use the manufacturer's default mixer mappings but to expect customized channels mappings and controls instead. TYPE 1) Channel Mapping Customization The following are defaults: ..,AUX1_Src_Name,,"CD" // For AUX 1 Channel ..,AUX2_Src_Name,,"Synth" // For AUX 2 Channel ..,DAC_Src_Name,,"Wave" // For LOC and ROC channels ..,MIX_Src_Name,,"Mix" // For loopback Mix Channel ..,Karaoke_Src_Name,,"Voice" // For enabling Karaoke Below are supported only if you have the extended CODEC on board such as CS4231 or AD1845. ..,LINE_Src_Name,,"Line" // For LINE Channel ..,MIC_Src_Name,,"Mic" // For Microphone Channel // Supported by AD1845 Only ..,MONOIN_Src_Name,,"Alarm" // Channel mapping customization allows renaming of a source to a different name thus changing the original assumed source mapping of the channel. TYPE 2) Extra internal controls through existing H/W resource - for controls using general purpose output bits of CODEC or MC device. These internal controls are of the ON/OFF type controlled by a single toggling bit. The following are valid: ..,Total_Internal_Controls,1,n // Total number of controls desired, // maximum is 3. // Default is assumed to be none. ..,Internal_Control_1_Name,,"SRS-3D" // Name to call this control. ..,Internal_Control_1_OnVal,1,00 or 01 // What is the default ON bit. // Default is 01. ..,Internal_Control_1_By,,"XCTL0" | "XCTL1" | "GPOUT" // What bits to use for control based on the following // available on the default H/W. XCTL0 - OUT 0 bit located at index 10 of CODEC registers XCTL1 - OUT 1 bit located at index 10 of CODEC registers GPOUT - General Purpose Output bit at MC4 ..,Internal_Control_2_Name,,"" ..,Internal_Control_2_OnVal,1,00 or 01 ..,Internal_Control_2_By,,"" . . ..,Internal_Control_n_Name,,"" ..,Internal_Control_n_OnVal,1,00 or 01 ..,Internal_Control_n_By,,"" TYPE 3) Extra external controls through external logic (Requires DLL from third party). ..,Total_External_Controls,1,n // Total number of controls desired, // maximum is 3. // Default is assumed to be none. ..,External_Control_1_Name,,"SRS-3D" // Name to call this control. ..,External_Control_1_By,,"XCONT_1.DLL" // The accompanying DLL. Each // external control has it's own // unique DLL. ..,External_Control_2_Name,,"" // Name to call this control. ..,External_Control_2_By,,"XCONT_2.DLL" ..,External_Control_3_Name,,"" // Name to call this control. ..,External_Control_3_By,,"XCONT_3.DLL" Each external control has it's own set of exported functions for the driver to call. For example, external control 1 will have the following 3 functions: XControl_1_Init(); XControl_1_On(); XControl_1_Off(); The accompanying DLL must export these functions exactly as named above. ** NOTES ** 1) Internal and External Controls must be of the ON/OFF control types; any other types are not supported for now. 2) In order to make use of the ON/OFF controls in the Volume Control application bundled with Windows 95, you will have to enable the "Advance Controls" option under the "Properties" menu item. %% END %%