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 Forum index » Off-Topic Area » Programming
Question about the Windows boot loader
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mahaju


Joined: 11 Oct 2010
Posts: 493
Location: between the keyboard and the chair

PostPosted: Tue 08 Feb 2011, 07:18    Post_subject:  Question about the Windows boot loader  

Hi
Which part of the MBR tells the computer the location of the boot.ini file in windows? Is there any way to manually change this pointer in the MBR to some other location such as, say, my_boot.ini?

Just curious
Smile
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Cust0dian


Joined: 22 Oct 2010
Posts: 28
Location: Russian Federation, St. Petersburg

PostPosted: Tue 08 Feb 2011, 10:51    Post_subject:  

Why not just edit existing boot.ini? Very Happy
Actually, there is no reference in MBR to boot.ini. MBR executes ntldr — NT Loader which reads boot.ini, so you need to edit ntldr (I don't even nearly know how this can be possible). You might want to see this.
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8-bit


Joined: 03 Apr 2007
Posts: 3368
Location: Oregon

PostPosted: Tue 08 Feb 2011, 12:28    Post_subject:  

What version of Windows are you wanting to modify the boot.ini on?
I have never had any problems just using Grub install on Windows XP and previous releases.
But Windows Vista and 7 have their boot loader made differently.
The easy way to modify that boot loader is to download and use Easy BCD to set up boot.ini.
I used it to set up the Windows Vista boot loader to boot to Puppy on a partition on a second IDE hard drive.
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amigo

Joined: 02 Apr 2007
Posts: 2252

PostPosted: Tue 08 Feb 2011, 14:24    Post_subject:  

Actually, the windows MBR doesn't even load ntldr. It simply loads the code at the start of whichever bootable partition it finds. If you make the main windows partition inactive(non-bootable), then the system will not boot. As mentioned nldr runs and process the boot.ini file.
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