    AST RESEARCH, INC.          TECHNICAL BULLETIN # 1811          4/22/98

    TITLE  Bravo MS/MS-T Lock-up During NT Boot

    ISSUE

       Some Pentium II, Bravo MS or MS-T systems may experience a lock-up
       on the Windows NT 'Version' screen during boot.

    BACKGROUND

       This issue is caused by an IRQ conflict between the parallel port
       (lpt1) and the ESS sound driver.

    ACTION

       To correct the issue, the ESS driver must be moved to another IRQ
       by the following procedure:

       1.  Turn on the system and press F2 to enter Setup, when prompted.
       2.  From System Setup, arrow over to 'Advanced', then down to
           'Peripheral Configuration', and press <enter>.
       3.  Arrow down to 'Parallel Port' and press <enter>.
       4.  Select 'Disabled' and press <enter>.
       5.  Press F10 to Save and Exit then answer 'Yes' for Setup
           Confirmation and press <enter>. The system will now restart and
           boot normally to NT.
       6.  Open Control Panel and select Multimedia.
       7.  Select the Devices tab, then expand the Audio Devices entry.
       8.  Select Audio for 1879/1869/1878/1868/1887/1888 AudioDrive and
           click Properties.
       9.  Click on the Settings button.
       10. Verify that the Base I/O Address is set to 220, then click
           Continue.
       11. Set the Capture IRQ to '5', then click OK.
       12. Select Restart Now and let the system reboot.
       13. Again, press F2 to enter Setup, when prompted.
       14. From System Setup, arrow over to 'Advanced', then down to
           'Peripheral Configuration', and press <enter>.
       15. Arrow down to 'Parallel Port' and press <enter>.
       16. Select 'Enabled' and press <enter>.
       17. Press F10 to Save and Exit then answer 'Yes' for Setup
           Confirmation and press <enter>. The system will now restart and
           boot normally to NT.

       The lock-up should not reoccur.

    NOTES

       You can download this file from the following services:

          AST WWW Site:  http://www.ast.com
          AST On-Line! BBS*:  See IB0001.TXT
          CompuServe:  GO: ASTFORUM
          Prodigy:   JUMP: ASTSUPPORT
          * Refer to IB0001.TXT for a list of AST's
            international BBS numbers.

    SYSTEMS AFFECTED

       This issue may affect the following systems: 503367, 503368,
       503369, 503370, 503502, 503542, 503615

    TAN  0200PS

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