
****NOTE: You must Label this diskette 4900_AUDIO in order to install*******

README -  Toshiba 4900 Business Audio Device Driver Installation
----------------------------------------------------------------------
This readme file contains information on how to install the Toshiba 4900
audio device drivers for AD1848 and OPL3 in OS/2.


System Requirement
------------------
This installation requires OS/2 WARP version 3.0 or later.

WINOS2 Audio REQUIRES the following 3 updated files in c:\windows\system
directory. Verify the following updated files are installed. These files
are located on this diskette in the WINDOWS directory.

   FILE          SIZE    DATE     TIME
   ------------------------------------
   MIDIMAP.CFG   36333  10-05-94   2:20p
   SNDPORT.DRV   62288   3-13-95   5:47p
   VSNDPORT.386  22258   1-30-95  11:00a

To install these files, insert the Toshiba 4900 Audio diskette in drive
A:, and change directory to WINDOWS.  In Windows directory type:

WIN_INST C:\WINDOWS

Toshiba 4900 Audio Installation for OS/2
----------------------------------------
To install device support, insert the Toshiba 4900 Audio diskette in drive A:
and type MINSTALL from the A: drive. Select both the "AD1848 Wave Audio" and
"OPL3 MIDI" icons.  Click Install.

The Toshiba 4900 Audio device driver installation adds 5 statements to your
CONFIG.SYS file.  These statements are displayed as follows:

   DEVICE=c:\mmos2\sndport.sys T:TOSHIBA_4900 P:530 D:1 I:10 N:BSAUD1$
   DEVICE=c:\mmos2\vbsaudio.sys BSAUD1$
   DEVICE=c:\mmos2\timer0.sys
   DEVICE=c:\mmos2\opl3.sys /P:388 /N:OPL31$

Shutdown and reboot for the Toshiba 4900 device driver installation to take
effect.  You should now have Audio in OS/2 and WINOS2.

(***NOTE:  If you have previously installed the Bussiness Audio drivers for
 another Toshiba model then your config.sys file will contain the following 
 two lines:

   DEVICE=c:\mmos2\busaudio.sys T:TOSHIBA_4900 P:530 D:1 I:10 N:BSAUD1$
   DEVICE=C:\MMOS2\AUDIOVDD.SYS BSAUD1$

 If the lines above are in your config.sys file, an error message will be
 displayed when your computer attemps to load the SNDPORT.SYS driver.
 To eliminate this error, you should "rem" out or delete the lines shown
 above from your config.sys file and then save the file and shutdown and
 reboot your computer.)


Toshiba 4900 Audio Device Driver Parameters:
--------------------------------------------

  PARM     DESCRIPTION               VALID VALUES                   DEFAULT
+-------+--------------------------+------------------------------+------------+
|  P:   |  Base I/O port address   | 530, 604, E80                |   530      |
|  D:   |  DMA channel             | 0, 1, 3                      |    1       |
|  I:   |  Interrupt level (IRQ)   | 7, 9, 10, 11 (decimal)       |    10      |
|  T:   |  Device Type (name)      | Must be TOSHIBA_4900         |TOSHIBA_4900|
|  N:   |  Name of PDD             | BSAUD1$(supplied by install) |   n/a      |
+-------+--------------------------+------------------------------+------------+


Using Audio in DOS and Win-OS/2 Sessions
----------------------------------------
To enable Audio for DOS sessions, you must set DOS properties to the
following:

   AUDIO_ADAPTER_SHARING    Required
   INT_DURING_IO            On
   HW_TIMER                 On
   VIDEO_RETRACE_EMULATION  Off


Audio Concurrency Issues - OS/2, DOS, Win-OS/2
----------------------------------------------
Using a single audio device, it is not possible for two programs
(device drivers) to use the device at the same time.

DOS applications do not participate in MMPM/2 resource management.
When DOS sessions use the audio device, all other programs are
unable to access the audio device.

Audio device drivers for Windows, installed under Win-OS/2, attempt to use
the audio device in all Windows sessions.  For Win-OS/2 sessions which do
not use the audio device, you can set the AUDIO_ADAPTER_SHARING property
to "None".  This prevents the session from accessing the audio device, and
enables the device to be used by other applications.

