AudioDrive ES1688 OS/2 Drivers
Software Release Notes
February 6, 1996
About This Release
ESS Technology is providing updated OS/2 drivers for the
AudioDrive ES1688 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.
Product: AudioDrive ES1688 OS/2 Device Drivers,
Drivers: ES1688 (with ESFM), ES1688 PnP
OS: OS/2 Warp 3.0
Release Date: February 6, 1996
The AudioDrive ES1688 OS/2 Drivers Software Release incorporates
new changes done to the previous release, Version 1.02.
Version 1.03 Changes
1. MIDI play is corrected for very fast I/O bus machines.
2. An option to use DMA single mode transfer has been added.
3. An OS/2 driver for use with ES1688 PnP is added.
4. 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. After then if the
input source is switched back to the default microphone
because a wave file is opened, you have to turn monitor off
and then on to switch back to line in.
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.
4. In ThinkPad 760C mixer CD volume of 10 starts generate noise
To install the new drivers successfully the following steps must
1. Open an OS/2 Window and run the EINSTALL.EXE program on the
installation disk by typing "A:EINSTALL 1688." For ES1688
with PnP support, use "A:EINSTALL 1688P." The program first
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
checkmark beside AudioDrive ES1688 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 ES1688 drivers to take
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 MMOS2INSTALL. 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.
For ES1688 PnP, in a system with Plug and Play support the
optimal settings will be used instead of the settings specified
in CONFIG.SYS. If you change the ES1688 PnP settings in a
system with no Plug and Play support, be sure to reset the
computer for ES1688 PnP to forget its previous settings.
These are the files copied to your hard disk: