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1994-03-05
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81 lines
DOCUMENT:Q104354 04-MAR-1994 [W_NT]
TITLE :RESOLVED HOTSITE: Windows NT Traps with Dell 450M (Trap 7F&0A)
PRODUCT :Windows NT
PROD/VER:3.10
OPER/SYS:WINDOWS
KEYWORDS:
--------------------------------------------------------------------------
The information in this article applies to:
- Microsoft Windows NT operating system version 3.1
- Microsoft Windows NT Advanced Server version 3.1
--------------------------------------------------------------------------
SYMPTOMS
========
Dell 450M computers running Windows NT occasionally trap with a Trap 7F
(opcode 6) and Trap 0x0a.
MORE INFORMATION
================
Dell has confirmed that a problem exists with Dell 450Ms (BIOS revisions
including A08, A10, A11, and A12) with the 16 megabyte memory modules and
Windows NT.
Windows NT may trap occasionally with a Trap 7F (Unexpected Kernel
Mode Trap) with an opcode of 6 (illegal opcode) or trap 0x0A. The
traps appear to occur due to a BIOS problem on the Dell 450Ms. The
problem can be resolved by either slowing the machine down to a slower
speed (16 MHz) or by doing the following.
To correct the BIOS problem on the Dell 450M, do the following:
1. Start the computer with an MS-DOS floppy disk with DEBUG.COM.
2. Run Debug and issue the following commands:
- o 28 2b
- i 24
(you will see a value of 11)
- o 28 2b
- o 24 31
3. Restart the computer by pressing CTRL+ALT+DEL. Do not power cycle
the computer.
This setting stays in effect until the computer is turned back on after
being turned off. At that time, you will need to perform the above steps
again. The above changes introduce a wait cycle and turn pipeline mode on
for the computer. There will be a slight performance degradation due to
doing this, but it shouldn't be a noticeable change.
NOTE: Dell is currently testing this fix and will provide a more
appropriate way of correcting this problem soon. No time frame is available
at this time. Contact Dell Computer Corp. for more information on this
issue.
The Dell products included here are manufactured by Dell Computer Corp., a
vendor independent of Microsoft; we make no warranty, implied or otherwise,
regarding these products' performance or reliability.
Additional reference words: 3.10 450M 486
KBCategory:
KBSubCategory: hotsite STPSCRN hrdwr
=============================================================================
THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS
PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS
ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO
EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR
ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF
MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION
OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
SO THE FOREGOING LIMITATION MAY NOT APPLY.
Copyright Microsoft Corporation 1994.