AudioDrive ES688 OS/2 Drivers, Version 2.01

                            Software Release Notes

                               October 24, 1995




        About This Release

        ESS Technology is providing updated OS/2 drivers for the
        AudioDrive ES688 chip in this Software Release.  These drivers
        are complete updates to prior ESS releases for OS/2 Warp 3.0.

        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 ES688 OS/2 Device Driver,
                        Version 2.01

        Drivers:        ES688 (with OPL3)

        OS:             OS/2 Warp 3.0

        Part Number:

        Release Date:   October 24, 1995




        Release Description

        The AudioDrive ES688 OS/2 Driver Software Release incorporates
        new changes done to the previous release, Version 2.0.

        Version 2.01 Changes

        The following changes have been incorporated:

        1. The OS/2 driver fixes the problem that I/O base addresses 230
           and 250 were not allowed.

        2. The driver correctly resets the MIDI controllers after the
           MIDI file is stopped.

        3. The driver now can play fast tempo MIDI files.

        4. The driver can play 8Khz wave files again.


        New Features in Version 2.01

        APM support

        The OS/2 driver supports Advanced Power Management (APM).  It is
        recommended that users stop audio applications before putting
        the system into suspend mode.




        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.

        2. Tempo in MIDI files is not 100% accurate due to timing delay.

        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.

        4. There is a popping noise at the beginning of wave file play
           when the PCM format has been changed.




        Installation Notes

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

        1. Open an OS/2 Window and run the ESUNINST.EXE program on the
           installation disk by typing "A:ESUNINST".  This 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 ESS driver information in COMPLIST.INI.

        2. Run the MINSTALL.EXE program on the installation disk by
           typing "A:MINSTALL".  Select AudioDrive ES688 by clicking
           the mouse on that item.  A checkmark means it is selected.
           If WinOS2 is installed in the system, you can select ES688
           WinOS2/Windows Audio support too.  If not, make sure that
           item is not selected.  Click the Install button to start the
           installation.  Once the drivers are installed, shutdown and
           restart OS/2 for the new ES688 drivers to take effect.


        These are the files copied to your hard disk:

        \MMOS2
                ES688DD.SYS
                VAUDDRV.SYS
                TIMER0.SYS
                MINSTALL.EXE
        \MMOS2\DLL
                CARDINFO.DLL
                ESSVSD88.DLL
                WININST.DLL
                WINRES.DLL
        \MMOS2\HELP
                ES688IN.HLP
        \OS2\BOOT
                CLOCK01.SYS
                CLOCK02.SYS
        \WINDOWS
                AUDDRIVE.HLP
        \WINDOWS\SYSTEM
                AUDMPIO.DRV
                ES688WIN.386
                ES688WIN.DRV
                MIDIMAP.CFG
                MSMIXMGR.DLL



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NOTE: 
** NO WARRANTY **  ANY USE BY YOU OF THE SOFTWARE IS AT YOUR OWN RISK.
THE SOFTWARE IS PROVIDED FOR USE "AS IS" WITHOUT WARRANTY OF ANY KIND. 
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ALL WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, WITHOUT
LIMITATION, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 
PARTICULAR PURPOSE. IBM IS NOT OBLIGATED TO PROVIDE ANY UPDATES TO THE
SOFTWARE.

NO LIABILITY FOR CONSEQUENTIAL DAMAGES.  In no event shall IBM or its 
suppliers be liable for any damages whatsoever (including, without limitation, 
incidental, direct, indirect special and consequential damages, damages for 
loss of business profits, business interruption, loss of business information, 
or other pecuniary loss) arising out of the use or inability to use this
product, even if IBM has been advised of the possibility of such damages.
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