ESS DirectX Driver Upgrade Installation
                Dec. 15, 1995   ESS Technology, Inc.

      Overview

      This note shows a procedure for PC users to upgrade ESS device
      drivers to the last version 4.03.xx.  This ESS device driver upgrade
      enables new PCs with ESS audio devices to run new Games using
      Microsoft's DirectSound audio capability.



      Installing New Drivers

      The following are stepwise procedures for installing new ESS
      AudioDrive drivers with DirectX DirectSound support.

      Under Windows 95, perform right mouse click on "My Computer" to
      bring up the "System Properties" dialog box. Select "Device
      manager", double click on "Sound, video and game controllers", this
      should display the "ESS ES1688 AudioDrive". Double click on the "ESS
      ES1688 AudioDrive" to bring up the "ESS ES1688 AudioDrive
      Properties" dialog box. Select "Driver" to show the driver files,
      click the "Change Driver" button, this will bring up the "Select
      Device" dialog box. Click the "Have Disk..." button, insert the
      AudioDrive drivers disk in floppy drive and enter the appropriate
      drive letter and directory in the "Install From Disk" dialog box,
      for example: "A:\WIN_95", click "OK". This should bring up another
      "Select Device" dialog box with the "ESS ES1688 AudioDrive"
      selected, click the "OK" button. Click the "OK" button on the "ESS
      ES1688 AudioDrive Properties" dialog box the click the "Close"
      button on the "System Properties" dialog box. Restart your PC.



      Technical Summary

      As of this writing, applications using Windows95 DirectX will
      introduce Microsoft DirectX drivers to the system in situations
      where older drivers or drivers with no DirectX support are found.
      Microsoft DirectX install does not properly install these drivers in
      situations where the AudioDrive v.4.01.xx (for ES488, ES1488, ES688,
      ES1688) is on the system due to differences in driver builds.  This
      in turn causes the system to lose sound or in certain cases cause
      GPFs.  ESS is providing a newer build of AudioDrive drivers to fix
      this problem, v.4.03.02 or later will include DirectX DirectSound
      support.