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Q156358: How to Manually Add Support for a Second Processor

Article: Q156358
Product(s): Microsoft Windows NT
Version(s): winnt:3.5,3.51,4.0
Operating System(s): 
Keyword(s): 
Last Modified: 08-AUG-2001

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The information in this article applies to:

- Microsoft Windows NT Workstation versions 3.5, 3.51, 4.0 
- Microsoft Windows NT Server versions 3.5, 3.51, 4.0 
- Microsoft Windows NT Server version 4.0, Terminal Server Edition 
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SUMMARY
=======

This article describes how to change Windows NT from single processor support to
multiprocessor support or from multiprocessor support to single processor
support.

MORE INFORMATION
================

Before you start, make sure that you have a complete, working backup of the
system files and the registry, and that you have a current Emergency Repair Disk
(ERD). To create an updated ERD, run Rdisk.exe from a command prompt, and then
select Update Repair Info.

To add support in Windows NT for an additional processor, follow these steps:

NOTE: Some Compaq computers require a different HAL -- Halsp.dll. Refer to the
latest Compaq Software Support Disk SSD for details.

1. Install Windows NT to a separate folder on your hard disk, and then restart
  your computer to the new installation of Windows NT.

2. In the %SystemRoot%\system32 folder of your original Windows NT installation,
  rename the following files to alternate names:

  Ntoskrnl.exe
  Hal.dll
  Kernel32.dll
  Ntdll.dll
  Winsrv.dll
  Win32k.sys (additional file in Windows NT 4.0 only)

3. Determine which multiprocessor HAL your computer requires using the following
  list:

     Halast.dll    = "AST Manhattan SMP"
     Halsp.dll     = "Compaq SystemPro Multiprocessor or 100% Compatible"
     Halcbus.dll   = "Corollary C-bus Architecture"
     Halmca.dll    = "IBM PS/2 or other Micro Channel-based PC"
     halmpsm.dll   = "Micro Channel Multi Processor PC"
     Halapic.dll   = "MPS Uniprocessor PC"
     Halmps.dll    = "MPS Multiprocessor PC"
     Halncr.dll    = "NCR System 3000 Model 3360/3450/3550"
     Haloli.dll    = "Olivetti LSX5030/40"
     Hal.dll       = "Standard PC"  (single processor HAL)
     Hal486c.dll   = "Standard PC with C-Step i486"
     Halwyse7.dll  = "Wyse Series 7000i Model 740MP/760MP"

4. NOTE: The Ntkrnlmp.exe and appropriate HAL file need to be the same version
  as that of the NT installation. Failure to get files from the appropriate
  service pack will result in system instability and error message on blue
  screens. This also applies for files that require manual expansion with the
  Expand.exe tool that need to be obtained from the service pack cd or
  directory location.

  Copy the Ntkrnlmp.exe file and the appropriate HAL file from the Windows NT
  CD-ROM to the %SystemRoot%\system32 folder of your original Windows NT
  installation. If a service pack has been installed to the system, copy the
  files from the current service pack version cd or install location to the
  %SystemRoot%\system32 folder of your original Windows NT installation. Once
  the files are in place, rename them to Ntoskrnl.exe and Hal.dll,
  respectively.

5. Copy the Ntdll.dll file from the original Windows NT CD-ROM
  %SystemRoot%\system32 folder of your original Windows NT installation. If a
  service pack has been installed to the system, copy the files from the
  current service pack version cd or install location to the
  %SystemRoot%\system32 folder of your original Windows NT installation.

6. From a command prompt, expand the Kernel32.dll and Winsrv.dll files from the
  Windows NT CD-ROM or installed service pack to the %SystemRoot%\system32
  folder of your original Windows NT installation. For example, type the
  following commands:

  expand kernel32.dl_ %systemroot%\system32\kernel32.dll
  expand winsrv.dl_ %systemroot%\system32\winsrv.dll

NOTE: To properly expand files from the Windows NT CD-ROM, you must use the
Expand.exe utility included with Windows NT. The Windows NT Expand.exe utility
can only be run from a command prompt in a 32-bit environment such as Microsoft
Windows 95 or Windows NT.

NOTE: In Windows NT 4.0, the Win32k.sys file is also required. Expand it from the
original Windows NT CD-ROM or the installed service pack.

7. Restart your computer.

8. When the Windows NT kernel loads, ensure that it displays "Multiprocessor
  kernel" during startup.

Support for the second processor is now installed and is ready for use. To return
to single processor support, restore the old files to the original names in the
%System Root%\System32 folder, and then restart the computer.

NOTE: The files located on the Window NT CD-ROM and in the service packs are
multiprocessor-aware. To return to a single processor, you must install Windows
NT on a single-processor computer, install any applicable service packs, and
then copy the associated files from that computer to the computer you want to
return to a single processor. You should also update the Setup.log file in the
$SystemRoot%\Repair folder to reflect the correct state of your computer in
order for future service packs and the repair process to function properly. To
update the Setup.log file you must manually enter the correct file and checksum
value. For a listing of the correct values, see the following article in the
Microsoft Knowledge Base:

  Q168132 After Applying Service Pack NT Reports Single Processor

For additional information, see the following articles in the Microsoft Knowledge
Base:

  ARTICLE-ID: Q124541
  TITLE : Use UPTOMP.EXE to Upgrade Single-Processor to Multiprocessor

  ARTICLE-ID: Q148245
  TITLE : Upgrading from Uni- to Multi-Processor Requires Service Pack

  ARTICLE-ID: Q142660
  TITLE : Upgrade from Uni- to Multiprocessor (Uptomp.exe)and Win32k.sys

NOTE: When you change to or from single or multiple processors, if you are using
Proxy 2.0 server on the same computer, you also need to replace the Ipfltdrv.sys
driver as well (%SystemRoot%\system32\drivers). The single- processor version is
36 KB in size and is located on the Proxy 2.0 CD-ROM in the
Msproxy\I386\Routing\Up folder. The multiple-processor version is 34 KB in size
and is located on the Proxy 2.0 CD-ROM in the Msproxy\I386\Routing folder.

Additional query words:

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Keywords          :  
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT351search kbWinNT350search kbWinNT400search kbWinNTW350 kbWinNTW350search kbWinNTW351search kbWinNTW351 kbWinNTSsearch kbWinNTS400search kbWinNTS400 kbWinNTS351 kbWinNTS350 kbNTTermServ400 kbNTTermServSearch kbWinNTS351search kbWinNTS350search
Version           : winnt:3.5,3.51,4.0
Issue type        : kbhowto

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