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 ---------------------------------------------------------------------- The information in this data sheet is subject to change without notice. AST Research, Inc. shall not be liable for technical or editorial errors or omissions contained herein; nor for incidental or consequential damages resulting from the furnishing, performance, or use of this material. This material contains information protected by copyright. No part of this material may be reproduced in any form without prior written consent from AST Research, Inc. All rights reserved. ---------------------------------------------------------------------- BWizard 1.0