Display article   Subject:  Sound Blaster Compatibility with Tandy MPCs
   04/30/97   18:37:30


SOUND BLASTER COMPATIBILITY WITH TANDY MPCS

With the shipments of Version 1.1 of the Tandy Multimedia PCs
and the 25-1085 Internal MPC upgrade kits, there have been some
questions about Sound Blaster compatibility.

The Tandy Multimedia Audio Board in Tandy  MPCs ships with its
interrupt set to IRQ10.  This is an acceptable setting for MPC
titles because the sound is routed through the Multimedia
Extensions.  However, the majority of non-MPC MS-DOS Sound
Blaster titles are hard coded to look for the sound at IRQ7.

To change the Tandy Audio Board from IRQ10 to IRQ7, follow these
steps:

1. Refer to the MPC "Getting Started" guide that comes with the MPC.

2. Turn off the computer, remove cover and access the audio board.

3. Move the jumper marked "ISEL0" so the pins are connected.

4. Replace cover.

5. Turn on the computer and go into the Windows subdirectory.

6. Edit the file SYSTEM.INI with the following changes.

   Under the section [Multimedia.Setup], change:

           Audio=Sb16snd.drv,220,10,301
   to
           Audio=Sb16snd.drv,220,7,301

   Under the section [Sndblast.drv], change:

           Int=10
   to
           Int=7


Once these changes have been made, save the SYSTEM.INI file.
The next time Windows is run, everything should work correctly.

NOTE: These changes are not recommended on the Tandy 4025 LX
computer.  On that computer, IRQ7 is used by the printer port.
You must choose between using the printer or having Sound Blaster
compatibility.
