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 PostPost subject: Does Windows XP have EFI?        Posted: Sun Jul 03, 2011 8:00 pm 
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I've heard different things about this. Some people said no, others said that the x64 copy did (which it didn't), then some people said that the IA64 had it (which I can't verify)

If the IA64 copy did have EFI, would there be hope in trying to boot it on my AMD UEFI system?

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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Sun Jul 03, 2011 8:17 pm 
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IA-64 is Itanium, so there's no hope of you running IA-64 software on your AMD PC.

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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Sun Jul 03, 2011 8:19 pm 
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IA64 isn't compatible with the AMD64 instruction set, so it won't run at all.

The IA64 XP edition does support EFI out of interest.

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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Sun Jul 03, 2011 8:47 pm 
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Ok thx for the responses. I was hoping that IA64 had some sort of compatibility with AMD64 or something, but guess not.

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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Mon Jul 04, 2011 12:56 am 
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Media Center 2005 (which is 32-bit only) does actually have EFI support.
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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Mon Jul 04, 2011 1:08 am 
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Derf wrote:
Media Center 2005 (which is 32-bit only) does actually have EFI support.
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I thought the only 32-bit EFI in Windows was in Windows Vista Beta 2 Build 5384.


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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Mon Jul 04, 2011 5:23 am 
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Yes Panda, I guess you're right. Vista Beta 2 was the FIRST & LAST one to support 32 bit EFI boot.

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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Mon Jul 04, 2011 6:26 am 
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Well....this version of Windows XP support bootmgr "normal",BCD and winload?


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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Mon Jul 04, 2011 8:08 am 
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So wait, media center 2005 32-bit can do EFI?

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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Mon Jul 04, 2011 2:21 pm 
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Espionage724 wrote:
So wait, media center 2005 32-bit can do EFI?

Yup. Not sure what implementation it supports or how it's used, but efi files seem to be there.


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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Wed Jul 06, 2011 7:48 am 
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Does the MCE cd/dvd have the EFI files on it for an EFI installation? I have a HP copy of MCE 2005, and it didn't contain an EFI or Boot folder.

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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Sun Jul 15, 2018 6:19 pm 
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Derf wrote:
Media Center 2005 (which is 32-bit only) does actually have EFI support.
Image

What is this computer model? Do you have this OS MCE2005 on CD/DVD or partition RAW image?

This is very interesting :)


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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Sun Jul 15, 2018 8:09 pm 
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This screenshot was not taken by Derf. It's unashamedly borrowed from a MacRumors post.

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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Mon Jul 16, 2018 2:27 am 
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Doesn't XP use NTLDR? I've never seen it on uefi. Maybe those files got there by accident? All the XP standard and MCE machines I've ever seen don't have a C:/boot folder, only later versions of Windows do.


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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Mon Jul 16, 2018 5:04 am 
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I am trying to run Vista Beta 1 Build 5112 in EFI mode in VMware Workstation 8 but I can not:
  • I installed Vista in BIOS mode
  • using this tutorial -> Adding a driver to a UEFI firmware I added the NTFS driver ntfs_ia32.efi but to 32-bit version 6020_ntfs.bin
  • I set the configuration in the .vmx file:
    Code:
    firmware = "efi"
    efi32.filename = "6020_ntfs.bin"
  • virtual machine boot in UEFI to Shell and I have access to files on the NTFS partition
  • I trying run winldfw.efi from Boot folder but there is always error:
    Exit status code: C000000D :(

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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Mon Jul 16, 2018 6:13 pm 
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Panda X wrote:
Derf wrote:
Media Center 2005 (which is 32-bit only) does actually have EFI support.
Image


I thought the only 32-bit EFI in Windows was in Windows Vista Beta 2 Build 5384.



Windows 8.1 and Windows 10 are also have x86 EFI. What about Windows XP x64? Does it have EFI?


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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Mon Jul 16, 2018 11:06 pm 
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Windows on EFI can only boot from GPT disks, therefore you can't install it with BIOS and then flip into EFI.

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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Tue Jul 17, 2018 1:57 am 
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Lotus Expeditor wrote:
[Windows 8.1 and Windows 10 are also have x86 EFI. What about Windows XP x64? Does it have EFI?


Biohead wrote:
The IA64 XP edition does support EFI out of interest.

Apparently only the IA64 edition, x86 and x86-64 versions of XP never supported nor shipped with files for efi boot. Itanium is incompatible with x86.

Derf wrote:
Media Center 2005 (which is 32-bit only) does actually have EFI support.
Image

Derf wrote:
Espionage724 wrote:
So wait, media center 2005 32-bit can do EFI?

Yup. Not sure what implementation it supports or how it's used, but efi files seem to be there.


Just read the macrumors thread, and the files in the screenshot were observed to be identical to the ones in Vista, complete with settings for UAP protection.
When installing Windows to a second partition, setup overwrites the first partition with it's own bootloader. OP had Vista December CTP installed, and realized the files weren't from XP.


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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Tue Jul 17, 2018 6:24 am 
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Lotus Expeditor wrote:
What about Windows XP x64? Does it have EFI?

WinXP x64 (amd64) not have EFI but support GPT disk:
Image
Can Windows XP x64 read, write, and boot from GPT disks?

Windows XP x64 Edition can use GPT disks for data only.


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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Tue Jul 24, 2018 3:51 pm 
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I've already seen those EFI files in Vista Build 5112, and after trying to run them in the EFI shell, it says "IA32 not supported by X64 shell". So they might be compatible with Itanium only

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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Tue Jul 24, 2018 7:47 pm 
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mahich03 wrote:
I've already seen those EFI files in Vista Build 5112, and after trying to run them in the EFI shell, it says "IA32 not supported by X64 shell". So they might be compatible with Itanium only

Let's first clear up some facts: IA-32 is 32-bit x86, while Itanium is IA-64. 64-bit x86 is AMD64.

Even though AMD64 is fully compatible with IA-32, 32-bit EFI executables will not run on a 64-bit EFI implementation. If you are using a virtualization software, you should switch the OS type to the 32-bit variant, which will make it use a 32-bit EFI implementation.

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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Thu Jul 26, 2018 11:51 pm 
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AlphaBeta wrote:
mahich03 wrote:
I've already seen those EFI files in Vista Build 5112, and after trying to run them in the EFI shell, it says "IA32 not supported by X64 shell". So they might be compatible with Itanium only

Let's first clear up some facts: IA-32 is 32-bit x86, while Itanium is IA-64. 64-bit x86 is AMD64.

Even though AMD64 is fully compatible with IA-32, 32-bit EFI executables will not run on a 64-bit EFI implementation. If you are using a virtualization software, you should switch the OS type to the 32-bit variant, which will make it use a 32-bit EFI implementation.

But the strange thing is that the EFI files I've tried to run were from the x64 version of Vista 5112, even though the shell sees them as IA-32 files

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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Sun Aug 12, 2018 7:29 pm 
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Having EFI is a property of the motherboard, not the operating system.

Also, I am pretty sure you can boot 32-bit versions of Windows XP on a system with EFI. It is possible to boot from MBR drives on systems with EFI.

Furthermore, Hard drives with a GPT partition table also have a legacy MBR.


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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Sun Aug 12, 2018 8:18 pm 
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Random_User wrote:
Having EFI is a property of the motherboard, not the operating system.

(U)EFI support actually depends on both the operating system and the motherboard.

Random_User wrote:
Also, I am pretty sure you can boot 32-bit versions of Windows XP on a system with EFI. It is possible to boot from MBR drives on systems with EFI.

Technically, you can boot from a MBR disk in EFI mode, knowing that you have a FAT32 partition containing the .EFI boot files. That means you cannot boot from a Windows XP (legacy) MBR disk in EFI mode.

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 PostPost subject: Re: Does Windows XP have EFI?        Posted: Sun Aug 12, 2018 8:41 pm 
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Right, my point is that a motherboard can have EFI, and an operating system can support booting from a GPT storage device, but an operating system cannot "have EFI".


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