Jatex’s Weblog

HOW ENABLE HT OR INSTALL A SECOND CPU
AFTER WINDOWS XP PROFESSIONL IS ALLREADY BEEN INSTALLED

Install the second cpu, or enable ht in the bios. Boot into windows, and go to the device manager, under processor check and see if windows is seeing two cpus, if not make sure your second cpu is installed properly and that the bios has smp enabled.

1. Now that your windows xp sees two processors, under processors in device manager, you are ready enable smp.
2. Located your windows xp install cd, and inside the i386 folder you should find two files, ntkrnlmp.ex_ and halmacpi.dl_, these are the files required to enable smp.
3. Next would be to extract there files to your windows system32 folder.
4. Open a new dos box, go to start run, and type in cmd.
5. Now type in
“extract x:\i386\ntkrnlmp.ex_ c:\windows\system32\ntkrnlmp.exe” (x: being the drive letter of your cdrom drive, that windows xp cd is inserted in).
6. Extract the second file, from the same dos box, “extract x:\i386\halmacpi.dl_ c:\windows\system32\ halmacpi.dll”. Please make sure that you don’t misspell the files name (if your windows xp has been installed in a different drive or folder, extract the files into where you installed windows xp and the system32 folder (drive x:\winxp\system32).
7. Now we read to edit the boot.ini. Once again go to into a dos box (start run, and type in cmd), now go to into the drive c: (your boot drive), and type in “attrib –r boot.ini”, next type in edit boot.ini (this can also be done from notepad, after you did the attrib command).
8. Inside your boot.ini, you will see a line multi(0)disk(0)rdisk(0)partition(1)WINDOWS=”Micros oft Windows XP Professional” /fastdetect or incase you got windows xp sp2 installed this line may be multi(0)disk(0)rdisk(0)partition(1)WINDOWS=”Micros oft Windows XP Professional” /fastdetect /NoExecute=OptIn
9. Now you can either copy the entire line and make a boot option for windows xp with smp or no smp.
10. After you copied the line or decide to not copy it, add, the following after the /fastdect [b]/kernel=ntkrnlmp.exe /hal=halmacpi.dll[]/b]
11. Your new line should look like multi(0)disk(0)rdisk(0)partition(1)WINDOWS=”Micros oft Windows XP Professional” /fastdetect /kernel=ntkrnlmp.exe /hal=halmacpi.dll
12. Now save the changes to your boot.ini
13. Your new boot.ini should look something like this
[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOW S
[operating systems]
14. multi(0)disk(0)rdisk(0)partition(1)\WINDOWS=”Windo ws Xp” /fastdetect /kernel=ntkrnlmp.exe /hal=halmacpi.dll
15. If you decided to have a boot option for windows xp with smp and without smp, your boot.ini can look something like this.
[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOW S
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS=”Windo ws Xp” /fastdetect /NoExecute=OptOut
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS=”Windo ws Xp SMP” /fastdetect /kernel=ntkrnlmp.exe /hal=halmacpi.dll
16. Please note you should leave a single space between, /fastdetect and /kernel=ntkrnlmp.exe and then once again a single space between /kernel=ntkrnlmp.exe and /hal=halmacpi.dll
17. Now that your allow set, save the changes to your boot.ini
18. I would highly recommend that you make two boot.ini for windows xp, one with smp and one with smp. Incase you misspelled a file name or missed a step, so you can still boot into windows xp and fix the problem.
19. Now that you are all set, reboot your computer, and boot into windows xp with smp. Windows xp should say new hardware detected, wait a bit, until it asks you to restart, now restart.
20. Once again boot into windows xp with smp. Go to into task manager, by pressing ctrl alt delete, once you are in task manager, click on the performance tab, and there should be two graphs, for cpu usage history, if there is two graphs in mean your windows xp is using both cpu. If there is only graph, please go back and carefully check all the steps.