AudioDrive ES1488 OS/2 Driver

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                         AudioDrive ES1488 OS/2 Driver

                                 Version 1.00

                            Software Release Notes

                                 April 4, 1996

        About This Release

        ESS Technology is providing OS/2 drivers for the AudioDrive

        ES1488 chip 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 ES1488 OS/2 Device Driver,

                        Version 1.00

        Drivers:        ES1488 (with OPL2)

        OS:             OS/2 Warp 3.0

        Part Number:

        Release Date:   April 4, 1996

        Release Description

        The AudioDrive ES1488 OS/2 Driver Software Release incorporates

        the following features.

        Version 1.00 Features

        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.

        Device sharing between OS/2 and WINOS2

        The audio device can be shared between Windows applications and

        OS/2 under an exclusive sharing arrangement.  If the device is

        not currently being used by an OS/2 application, when Windows

        runs an audio application, Windows will own the audio device

        until the Windows application (or session) is terminated.  Then

        ownership will pass to the next application requesting it (OS/2

        or Windows).  This all occurs while maintaining the state of the

        device for all applications.

        Input monitoring

        Input source monitoring during non-recording time is

        implemented.  However, there are some limitations to this

        feature due to the design of MMPM/2.  When Digital Audio comes

        up, the default microphone input source is used.  If you want to

        switch to line in, you must start recording to send the

        information down to the driver.  Note that ES1488 does not

        support input monitoring during recording.

        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.

        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 auto-detect the chip, then calls

           ESUNINST.EXE to remove old drivers.  That 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.

        2. When Multimedia Application Install program brings up, a

           check mark beside AudioDrive ES1488 means that item is

           already selected.  To toggle selection, click the mouse on

           the item.  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 reset the computer for the new ES1488 drivers to

           take effect.

        3. Since this version of MINSTALL.EXE changes the icons of MIDI

           player and Digital Video player to that of Digital Audio

           player in the Multimedia folder, you may want to change them

           back to the originals.  To change the icon of MIDI player,

           right click MIDI player to bring up the menu.  Select

           Settings, select General, and click the Find... button.  In

           the Start Folder window, enter \MMOS2\INSTALL.  Click the

           Find button and a window of all found icons appears.  Select

           MIDIPLAY.ICO and click OK.  Close the MIDI player Settings

           notebook.  For Digital Video player, repeat the above steps

           but select VIDPLAY.ICO instead.

        4. If the MIDI plays are not smooth in WinOS2, you need to

           change the timer resolution.  Edit SYSTEM.INI in your Windows

           directory.  Under [timer.drv] are TIMERMax386Res and

           TIMERMax286Res.  You need to change the values to less than 8

           from the default of 10.

        These are the files copied to your hard disk:
























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