PC Sound System Plus  (250-1701)     Settings         Faxback Doc. # 2662

SETTING THE ENVIRONMENT STRING:

You must include an environment string in your AUTOEXEC.BAT file * for your
PC and Sound Power to work together and run certain software.
The SETUP ENVIRONMENT option automatically sets the environment string
in your AUTOEXEC.BAT file.

If you are running Sound Power 2.0 for the first time, or whenever there
is a change in your environment settings (I/O address, Interrupt, or DMA
Channels),  you must use the SETUP ENVIRONMENT option to update the
environment string.

*Review your DOS manual for a better understanding of AUTOEXEC.BAT
procedures.

To update the AUTOEXEC.BAT file, select the SETUP ENVIRONMENT option from
the Diagnostics screen, and press ENTER.  This screen appears, prompting
your for confirmation to update.  Press Y, followed by ENTER.  The system
reboots.

CONFIGURING THE BOARD;
There are three configurable jumpers on Sound Power 2.0 that you can change:

        I/O Address                 (J1)
        GAME I/O  Port              (J2)
        IRQ Line Selector           (JP1)

For the locations of these jumpers, refer to the illustration of Page 4.
Any time you change the I/O Address setting (J1) and the IRQ Line Selector
(JP1), you must update your environment setup by following the procedures
in "Setting the Environment String" on Page 8.

SETTING THE I/O ADDRESS:

Sound Power 2.0 uses a range of your PC's I/O port addresses to transfer
data. The I/O addresses are selected by configuring jumper J1.  The default
range of addresses starts at 220H.  However, if this range conflicts with 
another device, you can select another address, starting at 240H.  The
following table shows how you can set jumper J1 to its two possible
settings.


         JUMPER J1                       SETTINGS
         Pins 2-3   closed               I/O address starts at 240H
         Pins 1-2   closed*              I/O address starts at 220H

                        * default setting.


Any time you change the I/O address setting (J1), you must update your
environment settings.  See "Setting the Environment String" on Page 8.

ENABLING\DISABLING THE GAME PORT:

Sound Power 2.0's game port is the same as a standard PC Game Control
Adapter.  You can connect any standard IBM PC-compatible analog joystick
that has a 15-pin   D-subminiature connector.  If you already have a game
port on your PC, ou might want to disable the game port on Sound Power 2.0
By changing the pin configuration on jumper J2, you can either enable or 
disable the game port.  The table shows the possible settings for JumperJ2.

               JUMPERS J2                      SETTINGS
               Pins 1-2 closed *               Game Port enabled
               Pins 2-3 closed                 Game Port disabled

                     *default setting.

SETTING THE IRQ LINE:
The sound board requires an interrupt line to facilitate DMA (Direct
Memory Access) transfers.  You can select this interrupt line by
configuring jumper block JP1.


The table below shows the available interrupt channels and the pin
positions that enable each interrupt.

JUMPER BLOCK JP1                            SETTINGS

Pins IRQ7   close *                        Interrupt line IRQ7 is enabled
Pins IRQ5   open  *                        for DMA transfers
Pins IRQ3   open  *
Pins IRQ2   open  *

Pins IRQ7   open                           Interrupt line IRQ5 is enabled
Pins IRQ5   close                          for DMA transfers
Pins IRQ3   open
Pins IRQ2   open

Pins IRQ7   open                           Interrupt line IRQ3 is enabled
Pins IRQ5   open                           for DMA transfers
Pins IRQ3   close
Pins IRQ2   open

Pins IRQ7   open                           Interrupt line IRQ2 is enabled
Pins IRQ5   open                           for DMA transfers
Pins IRQ3   open 
Pins IRQ2   close 

NOTE:  The board layout will reflect the fact that the top jumper is IRQ7.
       NOT IRQ2.
  
Any time you change the IRQ Line Selector (JP1), follow the environment
setup procedure in "Setting the Environment String" on Page 8.

NOTE:  Some computers do not allow you to use IRQ7.  Use IRQ 5 on these
       systems.

(jlc-10/12/93)