AudioDrive OS/2 Device Drivers

                                 Version 1.00

                            Software Release Notes

                               December 18, 1995




        About This Release

        ESS Technology is providing OS/2 drivers for the AudioDrive
        ES688, ES1688, and ES1788 chips in this Software Release.

        This document provides:
        - a description of the changes to the drivers
        - installation notes

        Please read this document completely before you upgrade your
        system, and follow the instructions carefully.




        Release Information

        Product:        AudioDrive OS/2 Device Drivers,
                        Version 1.00

        Drivers:        ES688 2.01, ES1688 1.02, ES1788 1.00

        OS:             OS/2 Warp 3.0

        Part Number:

        Release Date:   December 18, 1995




        Release Description

        The AudioDrive OS/2 Device Drivers Software Release incorporates
        the following features.

        Version 1.00 Features

        One step installation

        All OS/2 drivers reside on one disk.  An installation program
        will detect the AudioDrive chip installed in the system and
        provide the appropriate choices in the Multimedia Application
        Install program.  The use only needs to enter base I/O port,
        interrupt, and DMA channel information.


        Drive uninstallation

        An OS/2 program can be used to remove audio driver information
        from CONFIG.SYS, MMPM2.INI, and COMPLIST.INI.




        Known Problems

        1. Opening too many MIDI files makes the OS/2 system unstable.
           This problem is related to MMPM/2 and depends on system
           resource.  On systems with 8 Mbs memory, the limit is 3;
           16 Mbs, 6.

        2. Tempo in MIDI files may not be 100% accurate due to timing
           delay and MMPM/2 architecture.

        3. Running MCI commands "seek wave to #" and then "play wave" to
           a 16-bit wave file sometimes generates very loud static
           noise.  Likewise using "record wave from #" to record a
           16-bit wave file may generate wrong file.  It all depends on
           the seek position.  As a result, playing and recording 16-bit
           wave files is not reliable.  It is recommended that 8-bit
           wave files be used until a fix to MMPM/2 is available.




        Installation Notes

        To install the new drivers successfully the following steps must
        be taken:

        1. Open an OS/2 Window and run the EINSTALL.EXE program on the
           installation disk by typing "A:EINSTALL".  The program first
           runs ESDETECT.EXE to detect the chip, then calls ESUNINST.EXE
           to remove old drivers.  The later program will create a
           backup of CONFIG.SYS named CONFIG.ESS and remove the audio
           device lines from CONFIG.SYS.  It also creates a backup of
           MMPM2.INI named MMPM2.ESS and removes the audio drivers
           information from MMPM2.INI.  In addition, it removes any
           other ESS driver information in COMPLIST.INI.  After then,
           the installation program calls Multimedia Application Install
           program, MINSTALL.EXE.

        3. When Multimedia Application Install program brings up, a
           checkmark beside the AudioDrive chip name means that item is
           already selected.  Click the mouse on the item to toggle
           selection.  If WinOS2 is installed in the system, you can
           select WinOS2/Windows Audio support also.  If not, make sure
           that item is not checked.  Click the Install button to start
           the installation.  Once the drivers are installed, shutdown
           OS/2 and restart the computer for the new AudioDrive drivers
           to take effect.


        These are the files copied to your hard disk:

        \MMOS2
                ES688DD.SYS, ES1688DD.SYS, ES1788DD.SYS
                VAUDDRV.SYS
                TIMER0.SYS
                ESDAEMON.EXE
        \MMOS2\DLL
                CARDINFO.DLL
                ESSVSD88.DLL
                WININST.DLL
                WINRES.DLL
        \MMOS2\HELP
                ES688IN.HLP, ES1688IN.HLP, ES1788IN.HLP
        \OS2\BOOT
                CLOCK01.SYS
                CLOCK02.SYS
        \WINDOWS
                AUDDRIVE.HLP
                AUDMPU.HLP
        \WINDOWS\SYSTEM
                AUDMPIO.DRV, AUDMPU.DRV
                ES688WIN.386, ES1688WN.386, ES1788WN.386
                ES688WIN.DRV, ES1688WN.DRV, ES1788WN.DRV
                MIDIMAP.CFG
                MSMIXMGR.DLL