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1993-08-31
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DOCUMENT:Q103243 26-AUG-1993 [W_NT]
TITLE :Memory Problems in Dell Computers
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
--------------------------------------------------------------------
SUMMARY
=======
Various problems have been noticed with Windows NT and some Dell
computers during installation. These problems usually take the form of
7f blue screen trap occurring during setup (see below).
==============================================================
STOP: 0x0000007f (0x0000000d,0x00000000,0x00000000,0x00000000)
UNEXPECTED_KERNEL_MODE_TRAP
eax=ffdff13c ebx=801ac718 ecx=ffffffff edx=80197e70 esi=e1000000 edi=00000001
eip=801645ca esp=801ac388 ebp=801ac3fc p4-0300 nv up ei ng nz na po nc
cr0=8005003d cr2=00000000 cr3=00030000 cr4=00000000 irql:1 efl=801ac3e0
gdtr=80036000 gdtl=03ff idtr=80036400 idtl=07ff tr=0028 ldtr=0000
80100000 2c51c0e8 ntoskrnl.exe 80400000 2c47123b hal.dll
80010000 2c360942 atdisk.sys 80001000 2c4de536 ftdisk.sys
801e6000 2c42f49a fastfat.sys
==============================================================
An I387KD.EXE stack trace will resemble the following:
kd>kb
ChildEBP RetAddr Args to Child
801abf78 801481e2 00000001 e1000000 801ac718 NT!_DbgBreakPoint
801ac3e0 801645ca 0000007f 0000000d 00000000 NT!_KeBugCheckEx+0x38c
801ac3fc 80116be8 00000020 8012ccf6 ff29c7c8 NT!_KiSystemFatalException+0xe
801ac480 801bee29 00000001 0000000c 00000000 NT!_ExAllocatePool+0x1c2
801ac4c0 801bfae5 80267000 801b6e35 801ac74c
NT!_SepVariableInitialization+0x99
801ac4c8 801b6e35 801ac74c ffdff120 801aa308 NT!_SepInitializationPhase0+0x15
801ac5fc 801ba67a 00000000 80267000 80036c00 NT!_ExpInitializeExecutive+0x385
801ac74c 801ba3f5 801a9d20 801aa190 801ac770 NT!_KiInitializeKernel+0x25a
00000000 801ba3f5 801a9d20 801aa190 801ac770 NT!_KiSystemStartup+0x295
MORE INFORMATION
================
Confusion exists on the compatibility of SIMM memory between the 486
/L, /M, /T, /ME, and 333sl systems and previous models. Use the
following information to correctly configure memory on a Dell
computer:
486 /L, /M, and /T all use 70ns, nonparity, 72-pin SIMMs with
tin-lead contacts, in 4 megabyte (MB) and 16MB sizes. These are not
compatible with any other earlier Dell systems.
486/ME systems use 70ns, parity, 72-pin, 2MB, 4MB, 8MB, and 16MB
SIMMs with tin-lead contacts. SIMMs used in DE/SE models use gold
contacts and are 80ns, so they are not interchangeable. Due to the
parity bit, these are also not interchangeable with the /M, /T, and
/L systems.
The 333sl uses 60ns, nonparity, tin-lead, 1MB, 4MB, and 16MB 72-pin
SIMMs. These are unique to this system due to the 60ns speed.
The part numbers of the SIMMs are different for each "family" of
systems noted above, so be sure you are using the correct part for any
service activity.
All Dell EISA systems, including the ME, require SIMMs to be installed
in pairs. A single SIMM will not work.
NOTE: Memory modules that have mismatched speeds (for example, 70ns
and 80ns chips in the same computer) have also been known to produce
7f traps on setup.
Additional reference words: 3.10 crash
KBCategory:
KBSubCategory: 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 1993.