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    AST RESEARCH, INC.        TECHNICAL BULLETIN # 1400A                3-14-96

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    	       Bravo MS/L/T P75/P100/P133 Adding A Joystick Port

    PROBLEM

    When adding a joystick card, or a multi-I/O card with a joystick port to the
    Bravo MS/L/T P75/P100/P133, the system may report a conflict stating that
    the system already has a joystick.

    CAUSE

    The 202762-XXX main logic board in the system uses an integrated Crystal Audio
    Chipset.  The Crystal chipset includes joystick support, but the external port
    circuitry is not present on the main logic board. This joystick port is active
    by default in the DOS and Windows 3.1 environments. The joystick port is seen
    by Windows 95 because it is a Plug-n-Play Operating System.

    SOLUTION

    For the DOS/Windows 3.x environment, follow the steps below :

    1. Boot the system to a DOS prompt.  Be sure that the DWCFGMC.SYS driver is
       loaded.  The driver is included in the default CONFIG.SYS that ships with
       the system.

    2. Load the mouse driver.  On a default factory system, this should be :

    			   C:\MOUSE\MOUSE.COM

    3. Change the directory to

    			  C:\PLUGPLAY\ICU

    4. Run ICU.EXE.  You will see the CS4232 listed.  This is the Crystal Sound
       chip.

    5. Highlight the CS4232 by clicking on it with the mouse pointer.

    6. Choose the 'Modify' button.  A list of Crystal Audio features will be
       displayed on the screen.

    7. Highlight 'Game' by clicking on it with the mouse pointer.

    8. Choose the 'Settings' button.  A window with the game port settings will
       appear on the screen.

    9. From the 'Configuration Choice' box, click on the drop arrow on the right
       and choose 'CHOICE2' from the list.

    10. Click OK and follow the prompts back to the main screen.

    11. Click on 'File' from the top menu, then 'SAVE'

    12. Click on 'File' from the top menu, then 'Exit'

    13. Power OFF the system, and add the joystick card.

    14. Power back ON.

    For a Windows 95 system

    1. Run Device Manager.

    2. Double click on Ports to expand it and click on the Joystick port.

    3. Choose the Properties button.

    4. Remove the 'X' from the current Configuration box.  This will disable the
       joystick port.

    5. Choose OK and power OFF the system.

    6. Add the joystick card.

    7. Power the system back ON.

    SYSTEMS AFFECTED
    Bravo MS/T/L

    AST Part Number and Description

    501772-XXX      Bravo MS P/75
    501774-XXX      Bravo MS P/100
    501775-XXX      Bravo MS/L P/75
    501776-XXX      Bravo MS/L P/100
    501777-XXX      Bravo MS/T P/100
    501815-XXX      Bravo MS P/133
    501860-XXX      Bravo MS/T P/133
    501950-XXX      Bravo MS P/166

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